Tapmatic Corporation - 2000 Technical Manual - FPGA-FAQ

Tapmatic Corporation - 2000 Technical Manual 

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Recommended Tapping Speeds 

Drill Selection: Inches / Metric 

Drill Selection: Forming Taps 

Drill Size Factors 

Drill Depth Clearance Blind Holes 

Tap Recommendations For Specific Materials 

Illustration of Tap Terms 

Tap & Screw Thread Nomenclature 

Coarse vs. Fine Threads 

Machining Recommendations For Cold Forming Taps 

Tapping Torque & Horse Power 

Tapping Torque vs. Thread Strength 

Standard Tap Dimensions (ANSI Shanks) 

Standard Tap Dimensions (Din Standard 371) 


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Standard Pipe Tap Dimensions (ANSI/DIN) 

Class of Threads, H Limits 

Surface Treatments for Taps 

Tapping Collets 

Tapping Formulas 

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Home | Company Profile | Tapping News Update | General Catalog 

Accessories | World Distribution | Hi-Speed Tapping | To Order 

Tapping Check List | Programming 

Installation | Tool Parts List | Technical Data | Trouble Shooting 

Tapping Safety | Customer Service | Contact Us 

TAPMATIC CORPORATION 

802 Clearwater Loop / Post Falls, ID 83854 

208.773.8048 / 800.854.6019 / Fax: 208.773.3021 

info@tapmatic.com 

Copyright © 2000 Tapmatic Corporation 

Site hosted by Firsttel.com


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Tapmatic 


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We're Certain We Can Reduce Your Tapping Costs


Double Your Tap Life And Your Tapping Production, Increase 

Your Machine Life And Cut Your Power Consumption. 

Here at www.tapmatic.com, The Tapping Site, you'll find 

comprehensive information on tapping, taps, programming, 

installation, troubleshooting - everything you need to know to improve 

your tapping operation. Contact us for the most efficient and cost 

effective tapping methods in use today. For a FREE Video 

Demonstration of the latest Tapmatic tools or person to person help, 

call 800 854-6019. 

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208.773.8048 / 800.854.6019 / Fax: 208.773.3021 






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Tapmatic is a quality driven company 

committed to total customer satisfaction, 

through teamwork, innovative design and 

continuous improvement. 


International 

Corporation in 

Kriessern, 

Switzerland, has 

been certified by 

Bureau Veritas Quality 

to be in compliance 

with ISO 9001 

standards. 

Tapmatic participates in trade shows throughout the world. 

http://www.tapmatic.com/companyprofile.html (1 of 3) [1/4/2004 12:05:11 PM] 

TAPMATIC 

CORPORATION, Post 

Falls, Idaho has been 

certified by TUV 

ESSEN to be in 

compliance with ISO 

9001 standards.


TAPMATIC do Brasil manufactures a 

complete line of industrial cutting fluids and lubricants. 

Tapmatic, an American, family owned and operated business, 

has specialized in the development and production of selfreversing 

tapping attachments from its outset in 1952. Fortyeight 

years of experience and close cooperation with our 

customers have made Tapmatic the world leader in selfreversing 

tapping attachments. Tapmatic offers the most 

complete program available for the fastest way to tap on any 

machine and any application. 

Self-Reversal, Constant Speed and Renewable Drive are just a 

few of the features and patented innovations that set Tapmatic 

apart and guarantee faster cycle times, reduced machine wear, 

longer tap life, and less power consumption. 

Tapmatic's quality system has been certified by the registrar 

TUV Essen to meet all the requirements of ISO 9001- Your 

guarantee that Tapmatic will continue to provide state-of-the-art 

quality products that meet and exceed tapping requirements 

today and in the future. 









208.773.8048 / 800.854.6019 / Fax: 208.773.3021






Better CNC Tapping Guaranteed 

With Or Without Machine Reversals 

Rigid Tapping is the most popular way to tap with 

machine reversals. Two reversals are required for each 

tapped hole. Full size machining or turning centers protect 

themselves against reversal related wear and tear by limiting 

their tapping speeds. Small “high speed” drilling and tapping 

centers can be programmed for speeds up to 8000 RPM, but 

because of reversals their average tapping speeds are substantially 

lower. See test comparison on page 4. 

Tapmatic SynchroFlex ® Tap Drivers increase Tap Life By 100% 

Or More On Rigid Tapping Applications and can operate at whatever 

tapping speeds your machine can reach. Their unique patented technology 

incorporates a precision machined flexure between the shank and the tap chuck 

that eliminates the minute discrepancies between the machine feed and traverse 

and the exact thread pitch and hole location. Any discrepancy causes extra wear 

on taps. For exact speed for a specific tap in a specific material, please follow rules. 

and charts on pages 4, 5, and 6. 

Constant Speed Tapping relies on a compact tapping head to provide 

tap reversal. The machine spindle runs in one direction at the exact 

programmed speed and reversal occurs within the tapping head 

instantaneously upon machine retraction. The holes per minute 

(HPM) rate promised by the programmed RPM will be achieved. 

By avoiding the RPM fluctuations,common to machine reversal 

tapping, tap life will also be increased. 

Tapmatic RDT Self-Reversing Tapping Heads 

Can Double Tap Life And Tapping Production 

if installed, programmed, and operated according to 

Tapmatic instructions. Tapping speed rules and charts 

on pages 4, 5 and 6 were compiled by leading tap 

manufacturers, and surface feet have been 

converted to RPM. Each box shows recommended 

speeds for specific uncoated and coated taps and 

the best head to use for the application. Please 

note a range of speeds is always shown. For the 

exact speed, you must follow the rules on page 4. 

Continuing 50 Years Of Unmatched Tapping Performance 

TAPMATIC CORPORATION- ISO 9001 CERTIFIED: 802 Clearwater Loop, Post Falls, ID 83854, 208/773-8048, FAX: 208/773-3021 

TAPMATIC CORPORATION: ISO 9001 CERTIFIED:- 802 Clearwater Loop, Post Falls, ID 83854, 208/773-8048, FAX: 208/773-3021, www.tapmatic.com 

R

SynchroFlex Tapping Increases Tap Life By 100% 

Or More On Rigid Tapping Applications. 

Mr. Sean Ziese, 

Vice President 

Ziese Products Inc. 

Cookson, Oklahoma 

USA 

Application: Rigid Tapping 

Work Piece 

Material: CF8M 

Tap Sizes: 10-32 

Tap Styles: Spiral 3 Fluted, Modified Bottoming, GH-3 

Tap Material: HSS 

Hole Depth: .4 

Speed: 222 RPM 

Coolant: Master Chemical E206 

Tap Driver: Tap Collet (Rigid Tapping) 

Machine: Mazak VTC 16-B 

Problem: Short tap life 

Solution: Installed Tapmatic SFT50 

Results: Tap Life Increased from 72 

holes per tap to 216 holes per tap. Tap 

Costs Reduced from $77.00 to $25.00 per 

day and Production Increased from not 

changing taps so often. SFT50 Paid For 

Itself In 7 Days In Tap Cost Savings Alone. 

Mr. Markus Wildhaber 

Wildhaber AG 

Maschinenbau 

Krummenau, 

Switzerland 


Work Piece 

Material: 42CrMo4 V Heat Treated to 650 N/mm2 

Tap Size: M8 x 1 Metric Fine Thread 

Tap Style: Through Hole DIN 376 

Tap Material: HSSE-PM Powder Metal Vaporized, ESO 

Hole Depth: 10mm deep 


Coolant: Aral oil emulsion 6% 

Tap Driver: Conventional Collet Chuck (Rigid Tap 

Driver) 

Machine: LINEA Horizontal Machining Center with 

11 pallets and Fanuc 16M control. Parts 

loaded on pallets by ABB robot. 

Problem: Excessive tap wear & breakage after 

only 1000 holes resulting in downtime 

during unmanned shifts. 

Solution: Installed Tapmatic SFT50 Tap Driver 

Results: Tap Life Increased from 1000 to 

between 2400 & 2900 HPT(Holes Per Tap) 

Greater security that all holes are tapped 

during an unmanned shift. 

Mr. Karl Stickel 

Criterion Machine 

Works 

Costa Mesa, 

California 

USA 


Work Piece 

Material: 8620 

Tap Size: 5/16-24 

Tap Style: Plug 


Hole Depth: 9mm Min (M6 tap) 28mm Max (M8 tap) 


Coolant: Trim Sol 

Tap Driver: Rigid Collet 

Machine: Fadal VMC 3016 

Problem: Rough torn finish on threads in DBL-202 

bar holder. Threads would come out 

under or over size and required re-work. 

Solution: Installed Tapmatic SFT50 Tap Driver. 

Results: Threads consistently gage 

correctly eliminating time consuming 

re-work. Tap life increased 100 to 150% with 

much better quality threads. 

Mr. Bruce Todd, 

MacKay Mfg. Inc. 

Spokane, 

Washington, 

USA 


Work Piece 

Material: Titanium 6AL 4V, Hardness 140,000 psi 

Tensile 

Tap Sizes: 8-32 & 10-32 1/4-28 

Tap Styles: Spiral, Cutting Spiral, TIN, Coolant Thru 

Tap Material: HSS HSS, TIN Coated 

Hole Depth: .360 .600 

Speed: 710 / 695 RPM 685 RPM 

Coolant: Manually applied specialty cutting fluid. 

Tap Driver: Conventional Collet Chuck (Rigid Tap Driver) 

Machine: Mori Seiki SV500 B 

Vertical Machining Center 

Problem: Short, Inconsistent Tap Life and Tap 

Breakage. Manually applied specialty 

cutting fluid expensive and slowed 

production. 

Solution: Installed Tapmatic SFT50 Tap Driver and 

switched to normal recirculating coolant. 

Results: Tap Life Increased up to 200%. 

Eliminated inconvenience of specialty 

cutting fluid. 

Mr. Randy W. Clark & Mr. Jeff Spencer 

Clay Precision, Inc. 

Sherman, Texas USA 


Work Piece 

Material: 316L SST 18 Rc 

Tap Size: 1/4-20 

Tap Style: Blind Hole Tap GH3 HSS-E 




Coolant: EZ Foamy Cutting Fluid 

Tap Driver: Spring Load Floating Tapping Head 

Machine: Bridgeport Verticle Machining Center with 

CAT 40 

Problem: Taps were breaking after just 3 or 4 holes. 


Results: Tap Life Increased from 3 or 4 to 

over 400 (yes, 400) HPT (Holes Per Tap) 

Do The Math For 

Your Own Applications 

And See How Quickly 

SFT Pays For Itself. 

SFT Example I 

Tap Cost: $20.00 

Tap Life Increase: 100 Holes to 

200 Holes 

Savings Per Hole: 10 centsSFT50 

($365.00) 

Paid For Itself: In 3,650 Holes. 

*SFT Example II 

Tap Cost: $20.00 

Tap Life Increase: 1000 Holes to 

2000 Holes 

Savings Per Hole: 1 cent 

SFT50 ($365.00) 

Paid For Itself In: 36,500 Holes. 

TAPMATIC CORPORATION: ISO 9001 CERTIFIED:- CERTIFIED- 802 Clearwater Loop, Post Falls, ID 83854, 208/773-8048, FAX: 208/773-3021, www.tapmatic.com 

2

Constant Speed Tapping Also Cuts Cycle Times 

In Half On High Production Applications. 

Mr. Ken Hale 

P.M. Machine Company 

Berryville, Arkansas, USA 


Work Piece 

Material: 380 Cast Aluminum 

Tap Sizes: #6-32 

Tap Styles: Spiral Bottoming 


Hole Depth: .205” Thru 

Program Speed: 1800 RPM 

Coolant: Semi-Synthetic Emulsion 

Tap Driver: Conventional Collet Chuck (Rigid) 

Machine: Daewoo DMV-500 

Problem: “Starting and stopping of the 

rigid tap cycle was costing 

us too much time. The machine 

only reached a tapping speed of 

1200 RPM before reversing. 

Machine time in the part cycle time 

was much more of a percentage 

than desired.” 

Solution: Switched to Tapmatic RDT25 

eliminating wasted time in cycle 

allowing parts to run much quicker. 

RESULTS: 53% Cycle Time Savings. Cycle 

time for four parts dropped from 91 seconds 

to 43 seconds. So tapping time went from 

79 seconds to 31 seconds for 16 total holes 

from four parts. 

Total Savings 2 Seconds Per Hole 

Tapmatic Constant Speed Tapping Attachments incorporate similar technology 

to the SFT units and offer similar increases in tap life plus the benefit of 

constant speed throughout the tapping cycle. By eliminating machine reversal, 

they avoid the RPM fluctuations common to synchronous feed tapping and 

provide absolute maximum tap life. They also double tapping production in 

most applications. But Savings On Taps And Tapping Time Are Only Part 

Of The Story... 

CST, Constant Speed Tapping Advantages 

Extend Machine Spindle 

Life: Machine down time is the 

biggest shop expense. By eliminating 

wear caused by machine reversal 

(as illustrated in the power consumption 

comparison at right) in high 

production applications some 

customers have saved as much as 

$20,000.00 per machine on spindle 

replacements and down time annually. 

CST Uses Only 1/4th As 

Much Electrical Power In high 

production tapping this is a significant cost 

savings. 

Mr. David Matthew, 

Design Consultant 

Soken Engineering Ltd. 

Sub-Contract Machining 

and Manufacturer of 

Heat Sealing Equipment. 

APPLICATION 

Work Piece Material: Aluminum 

Tap Sizes: M3 

Tap Style: Spiral Drill-Tap 


Hole Depth: 3mm 

Program Speed: 3000 RPM 

Coolant: BP Biocut FG 

Machine: Bridgeport VMC800 

Digital 

Previous Tapping Method: New Job. First time run. 

Problem: To produce threads in cooling plates for 

communication systems. These components had to be 

produced in minimum time possible. 1 minute floor to floor 

was the objective. 

Solution: Installed Tapmatic NCRT25 Constant Speed, 

Self-Reversing Tapping Unit to drill-tap plates. 

RESULTS: 30 seconds floor to floor. 50% 

time savings over objective. Only one 

operation was required to complete job. 

250 plates completed in 2 hours, 2 threads 

in each plate, 125mm center distance. 

Eliminating machine reversal resulted in 

reduced machine wear and tear. 

TEST: Tap (144) 5/16” Holes 

Results: Tapmatic RDT uses 1/4th the energy of machine 

reversal and eliminates related machine wear and tear. 

Manufacturing Engineer 

Air Conditioning Compressor 

Manufacturer, USA 

APPLICATION 

Work Piece Material: Gray Cast Iron 

170-241 BHN 

Tap Sizes: M10, M5 

Tap Style: Straight Flute 

Program Speed: M10 / 795 RPM 

M5 / 1590 RPM 

Coolant: Semi-Synthetic 

Machine: Horizontal Lathe 

Previous Tapping Method: Non-Reversing 

Tapping Head 

Problem: Cycle time too long, 214 seconds.Tap Life 

too short, 2000 holes per tap 

Solutions: Installed Tapmatic ASR50 ConstantSpeed, 

Sellf-Reversing Tapping Unit. 

RESULTS: Reduced cycle time by 16 seconds 

without changing speeds. Producing 

an additional 100 parts per day or 21000 additional 

parts per year, saved 1.2 million dollars 

due to not having to purchase a 3rd machining 

cell. We have a potential for further 

reduction in cycle time from increased 

speeds but have not yet done this. Tap life 

increased from 2000 holes per tap to over 

4000 holes per tap. 

Now Check Your 

Total Savings With The 

Added Advantages of 

Constant Speed Tapping 

CST Example 

Machine Hourly Rate: $100.00 

Typical Time Savings 

Per Tapped Hole: 1 second 

Cycle Time Savings 

Per Hole: 2.8 cents 

*Plus Tap Life Savings 

From SFT Example II 1 cent 

Total RDT Savings 

Per Tapped Hole: 3.8 cents 

RDT50 ($1,417.00) 

Paid For Itself In: 37,289 Holes 

Please Note: RDT stands for Renewable 

Drive Tapping. Routine, preventative 

maintenance will assure continuous like-new 

performance. If done at 100,000 holes, for 

example, the cost should not exceed 1/10th 

of a cent per hole and take no more than 20 

minutes. 

TAPMATIC CORPORATION: ISO 9001 CERTIFIED:- 802 Clearwater Loop, Post Falls, ID 83854, 208/773-8048, FAX: 208/773-3021, www.tapmatic.com 

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CONSTANT SPEED SELF- 

REVERSING TAPPING 

UNITS 

For High Production On 

CNC Machining Centers 

RDT 

RDTXT 

NCRT 

RSR VMC 

RDT For Specific Machines 

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REVERSING TAPPING 

UNITS 

For High Production On 

CNC Machining Centers 

With Coolant Through The 

Spindle 

RDTIC 

RDTICXT 

ID 


REVERSING DRIVEN 

TOOLING 

ASR 

RSR


RIGID AND TENSION 

COMPRESSION TAP 

DRIVERS 

For Tapping With Machine 

Reversal 

SFT 

HPT 

NC 

GS/NCL 

NSM 

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SELF-REVERSING 

MANUAL APPLICATION 

TAPPING UNITS 

For Drilling And Milling 

Machines 

R-SERIES 

X-SERIES 

TC/DC SERIES 

SPD & SPD-QC SERIES 

DRY-CUT And 

ECONOMISER 

Minimum Quantity 

Lubricant And Dispensing 

Systems For Near-Dry 

Machining 

DRY-CUT 

ECONOMISER 

COLLETS, QC ADAPTERS. ARBORS, And INSTALLATION ACCESSORIES 

TAPMATIC Attachments Adapt Easily To All Machines 








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Parts Lists & Operation Instructions 

TAPMATIC Operator Instructions posted on this web site are 

designed to be printed out for easier reading. They may be 

difficult to read on your computer screen. 

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TO ORDER 

For your convenience, Tapmatic Spare Parts and 

Accessories may be purchased through your Local 

Stocking Tapmatic Distributor* or by MASTERCARD, 

VISA or C.O.D. Shipment from Tapmatic at 

800 854-6019. 

Tools For Tapping On Manual Machines 

30X, 50X, 70X & 90X Models 

30TC/DC, 50TC/DC, 70TC/DC Models 

R3, R5, R7 Models 

SPD3, SPD5, SPD7 & SPDA Models 

Tools For Tapping On CNC Machines 

NCRT15, 25 & 50 Models 

RDT15, 25, 50 & 75 Models 

RDT & RDTIC85 &100 Models 

RDTIC25, 50 & 75 Models 

RSRVMC Models 

ID50 Models 

Tools For 4 Axis CNC Lathes 

ASR Models 

RSR Models 

Rigid And Tension-Compression Tap Drivers 

Synchroflex SFT Models 

HPT Models 

NC Models 

NSM Models


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ECONOMISER Dispensing Systems 

ECONOMISER I 

ECONOMISER II 

ECONOMISER III 








208.773.8048 / 800.854.6019 / Fax: 208.773.3021 






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• 

Or By 

• 

• 

• 

• 

For your convenience Tapmatic Accessories may be purchased: 

Through your Local Tapmatic Stocking Distributor. 

Please see the "WorldWide Distributor" button for the phone # of your 

local Tapmatic Distributor 

MasterCard 

Visa or 

C.O.D. Shipment 

Payment In Advance 

● To Order: Call either your local Stocking Tapmatic Distributor (please see the 

"WorldWide Distributor" button for the phone # of your local Stocking Tapmatic 

Distributor) or Tapmatic at 800 854-6019. 

● Please Note: Orders under $50.00 are subject to a $10.00 handling charge. 

● Prices Are Subject To Change Without Notice. 

TAPMATIC ACCESSORIES 

Quick-Change Tap Adapters 

Positive Drive Adapters 

Adjustable Torque Control Adapters 

Rubber-Flex Collet Type Adapters 

TCSC Solid ER Holders 

New CAT & BT Shank Tool Holders 

Standard Steel Collets 

Square Drive ER Collets With Inch Shanks or Metric Shanks 

Tension Tap Collets 

Clamping Nuts, Wrenches 

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ER Collet Nuts & Steel Collet Seals 

New ER-Flex Steel Collets 

Rubber-Flex Collets & Model 100XB Steel Collets 

Interchangeable Chuck Inserts For Extended Length Tools 

Rubber-Flex Collet Insert 

ER-16 Steel Collet Insert 

ER-20 Steel Collet Insert 

E-Lock High Speed Quick-Change Adapters 

Arbors 

NC & HSK Shanks 

Torque Bars, Stop Blocks and Coolant Port Blocks 

Hex Keys & Wrenches 

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Dry-Cut Lubricant & Economiser Dispensing Systems 








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TOOLS 

Tapmatic Tools may be 

purchased through Tapmatic 

Distributors. For local assistance 

or To Place An Order, please click 

on your state in the map below for 

the name and location of the 

Tapmatic Representative or 

Stocking Distributor nearest you. 

If you do not find a Stocking 

Tapmatic Distributor in your area 

or one that you have an account 

with, please call us at 800 / 854- 

6019. 

Request Quote 

http://www.tapmatic.com/us.html (1 of 3) [1/4/2004 12:05:18 PM] 

ACCESSORIES 

For your own convenience 

Tapmatic Accessory prices are shown 

on this web site and may be 

purchased in any of the following 

ways: 

Through your Local Stocking 

Tapmatic Distributor. Please click on 

your state on the map below for the 

location of the Tapmatic 

Representative or Distributor nearest 

you. 

Or By: 

● MasterCard 

● Visa 

● C.O.D. Shipment 

● Payment In Advance. 

● For Tool Prices or a Recommendation For Your Particular 

Applications Please Call Us At 800 854-6019. 

● Please Note: Orders under $50.00 are subjuct to a $10.00 

handling charge. 

● Published Prices Are Subject To Change Without Notice. 

Place Order


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Please click on your state in the map below for the name and location of the 

Tapmatic Representative or Distributor nearest you. 

If you do not find a Tapmatic Distributor in your area or one that 

you have an account with, please call us at 800/854-6019 








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Worldwide Manufacturing, 

Sales And Service Centers 

Tapmatic markets worldwide with offices and representatives throughout the United 

States and in over 50 countries around the world and so can you! If you're a 

manufacturer interested in expanding your international marketing call: 800 854- 

6019. 

Tapmatic Corporation 

802 Clearwater Loop, 

Post Falls, Idaho 83854 

USA 

Phones: 208/773-8048 

Service: 800/395-8231 

Sales: 800/854-6019 

FAX: 208/773-3021 

E-Mail: info@tapmatic.com 

Internet: www.tapmatic.com 

Tapmatic Manufacturing Plants 

Tapmatic International 

Corporation 

TIC AG Alte Rheinstrasse 

CH-9451 Kriessern, 

Switzerland 

Phone: 011 41 71 757 5900 

FAX: 011 41 71 757 5901 

E mail: info@tapmatic.ch 

Internet: www.tapmatic.ch 

Tapmatic Sales & Service Centers 

USA 


802, Clearwater Loop 

Post Falls, ID 83854 

Tel: 001-208-773 80 48 

Fax: 001-208-773 30 21 

http://www.tapmatic.com/world.html (1 of 8) [1/4/2004 12:05:23 PM] 

Tapmatic do Brazil, 

Industria e Comercio Ltda. 

Caixa Postal 1913, 

01059-970 Sao Paulo-SP 

Brazil 

Phone: 011 55 11 3326 9979 

FAX:011 55 11 3326 1288 

E mail: quimatic@quimatic.com.br 


Internet: http://www.tapmatic.com 

Click here for your Local Tapmatic 

Representative


Argentina 

Coutil S. A. 

Caldas 220, 1427 

Buenos Aires 

Phone: 54 11 4855-6145 

Fax: 54 11 4856-4967 

Australia 

Selaby EDM Sales Pty. Ltd. 

47 Titan Drive 

Carrum Downs 

Victoria 3201 

Tel: 0011-61-39-775-1699 

Fax:.0011-61-39-775-1099 

Austria 

Gustav Hamerschlag & Co. KEG 

Faistauergasse 6 

A-1130 Wien 

Tel: 0043-1-802 42 02 

Fax: 0043-1-802 42 02 

GEBR. ULMER GmbH 

Rathausplatz 4/Postfach 7 

A-6850 Dornbirn, Austria 

Tel: 0043-5-572-30 70 

Fax: 59 5572 30 73 99 

Belgium 

Imatech SA / NV 

Quai des Charbonnages 36/38 

1080 Brüssel 

Tel: 0032-2-411 67 82 

Fax: 0032-2-411 51 20 

Brazil 

Tapmatic do Brazil 

Caixa Postal 1913 

01059 - 970 Sao Paulo 

S. P. Brazil 

Tel: 0055-11-3326 99 79 

Fax: 0055-11-3326 12 88 

CELMAR Comerciale 

Importadora Ltde 

Avenida Condessa Elisabeth de 

Robiano 930 

Tatuape, Sao Paulo 

SP 03074-000 Brazil 

Sanches Blanes, S.A. 

Estrade de Sapopemba RM 41, 

Ribeirao Pires 1, 

CEP 09400-970, Brazil 

Tel: 55 11 4827 9022 

Fax: 55 11 4827 9009 


E-Mail: coutil@infovia.com.ar 

Internet: http://www.coutil.com 

E-Mail: tapmatic-wien@mail.com 

E-Mail: info@imatech.be 

Internet: http://www.imatech.be 

E-Mail: quimatic@quimatic.com.br 

Internet: http://www.quimatic.com.br 

E-Mail: celmar@celmarnet.com.br 

Internet: http://www.celmarnet.com.br


Canada 

Tyson Tool Comp. Ltd. 

75, Ormont Drive 

Weston, M9L 2S3 Ontario 

Tel: 001-416-746 36 88 

Fax: 001-416-746 54 15 

China 

Brilliant Group Investment Ltd. 

Shanghai Office 

No. 369, 17 E/F Jiang Su Road 

Shanghai 200050 China 

Tel: 86 21 52400211 

Fax: 86 21 5240210 

Bejing Office 

Room 705, 706, Fu Dong Plaza 

Beijing 

66 Xin Zhong Street 

Dong Cheng District, 

Beijing 100027 China 

Tel: 86 10 65920195 

Fax: 86 10 65920187 

Xian Office 

Room 1601 Xian People Hotel No. 

319 

Dongxin Street 

Xian 710004 China 

Tel: 86 29 7292991 

Fax: 86 29 7292992 

Shenyang Office 

Room 1807 Sankei Hi-Teh Tower 

No. 262A 

Shifu Avenue, Shenhe District 

Shenyang 110013 China 

Tel: 86 24 22791902 

Fax: 86 24 22790258 

Wuhang Office 

No. 750, Ming Zhu Rd. Wuchang, 

Wuhan 

White Rose Hotel, Room 612, 613 

Wuhang, 430071 China 

Tel: 86 27 87277448 

Fax: 86 27 87274954 

Croatia 

FTS d.o.o. 

Samoborska Cesta 145 

41090 Zagreb-Susedgrad 

Tel: 00385-1-15 66 18 

Fax: 00385-1-15 66 38 


E-Mail: sales@tysontool.com 

Internet: http://www.tysontool.com 

E-Mail: fts@zg.tel.hr


Denmark 

Fuchs & Sidal 

Industriskellet 7 

3540 Lynge 

Tel: 0045-48-18 90 33 

Fax: 0045-48-18 92 33 

Finland 

Oy Maanterae AB 

Keinumäenkuja 

P.O. Box 70 

01511 Vantaa 

Tel: 0035-89-61 53 22 

Fax: 0035-89-61 53 23 50 

France 

Saphy SA 

20-22, Place de la République 

92600 Asnières 

Tel: 0033-147-94 29 29 

Fax: 0033-147-99 87 37 

Germany 

Tapmatic Werkzeug GmbH 

Frümbergstrasse 2 

51702 Bergneustadt 

Tel: 0049-2261-48 680 

Fax: 0049-2261-49 608 

Great Britain 

Tapmatic UK Ltd. 

Millers Close 

Industrial Estate 

Fakenham, Norfolk NR21 8NW 

Tel: 0044-1328-86 36 76 

Fax: 0044-1328-85 61 18 

Greece 

VIMA 

Vartan I. Mazloumian 

Monastiriou Street 151 

54627 Thessaloniki, Greece 

Tel: 0030-31-51 71 17 

Fax: 0030-31-52 91 07 

Holland 

VIBA NV 

Bleiswijkseweg 41 

NL-2712 PB Zoetermeer 

Tel: 0031-79-341 88 81 

Fax: 0031-79-341 80 31 


India 

Lokenath Chatterjee & Sons PVT. 

Ltd. 

18, Raja Woodmunt Street 

Calcutta 700 001 

Tel: 0091-33-243 11 82 

Fax: 0091-33-243 32 94 

E-Mail: fuchs.sidal@fusi.dk 

Internet: http://www.fusi.dk 

E-Mail: maantera@maantera.fi 

Internet: http://www.maantera.fi 

E-Mail: info@saphy.fr 

Internet: http://www.saphy.fr 

E-Mail: STS.Schmidt@hswww.de 


Internet: http://www.tapmatic.co.uk 

E-Mail: vimaco@spark.net.gr 

Internet: http://www.vimaco.gr 

E-Mail: viba@viba.nl 

Internet: http://www.viba.nl 

E-Mail: lokenath@giascl01.vsnl.in


Indonesia 

Kawan Lama Sejahtera pt. 

P.O. Box 5062 

Jakarta 11050 

Tel: 0062-21-600 53 33 

Fax: 0062-21-629 80 06 

Iran 

Boresh Abzar Iran Co. Ltd. 

No. 40 Zafar Street 

Vahid Dastegerdi 

Tehran 19117 

Tel: 0098-21-222 76 10 

Fax: 0098-21-227 24 26 

Israel 

Vargus Ltd. 

34, Itshak Sade Street 

P.O. Box 20102 

Tel Aviv 67212 

Tel: 0097-23-537 32 75 

Fax: 0097-23-537 21 90 

Italy 

Aktiva S.R.L. 

Via Pastorelli 13 

20143 Milano 

Tel: 0039-02-83 56 166 

Fax: 0039-02-83 21 008 

Japan 

Meiyu Airmatic Company Ltd. 

12-2 Shin-Yokohama 2 chome 

Kohoku-ku 

Yokohama 

Tel: 0081-45-473 18 81 

Fax: 0081-45-473 18 85 

Uni Tool Co., Ltd. 

54-9, 3-Chrome, Renkoji, 

Tama-City, 

Tokyo 206, Japan 

Tel: 0423 76 8747 

Fax: 0423 76 8748 

South Korea 

Ssang-In Trading Corp. 

503, Daeji Bldg. 

502-5, Shinwol 2-Dong 

Yangchun-Ku 

Youngdeungpo 

P.O. Box 354 

Seoul 

Tel: 0082-2-2607 61 23 

Fax: 0082-2-2607 61 25 


E-Mail: baico@home.com 

E-Mail: neumo@neumo-vargus.co.il 

E-Mail: aktiva@allasia.com 

Internet: http://www.aktiva.com 

E-Mail: yuji-w@pop02.odn.ne.jp 

E-Mail: ssangin@orgio.net


Mexico 

Herramex S.A. de C.V. 

Av. Hidalgo No. 85 

52740 Ocoyoacac Juarez, México 

Tel: 0052-728-2821 777 

Fax: 0052-728-2821 753 

New Zealand 

Trade Tools Ltd. 

9, Nelson Street / PO Box 2958 

Auckland, New Zealand 

Tel: 64 9 379 32 40 

Fax: 64 9 309 46 10 

Norway 

A/S Storm Martens 

P.O. Box 21-Kalbakken 

Staalfjaera 11 

N-0901 Oslo 

Tel: 0047-22-16 20 50 

Fax: 0047-22-25 89 31 

Phillippines 

Poland 

Wemax Ltd. 

Ul. Plazowa 49/1 

PL-15-502 Bialystok 

Tel: 0048-85-743 10 95 

Fax: 0048-85-743 10 95 

Portugal 

A. Borges do Amaral Lda. 

Rua Fernandes Tomas, 471 

P-4000 Porto 

Tel: 00351-2-2339 39 80 

Fax: 00351-2-2339 39 98 

Singapore 

Sing Huat Hardware & Machinery 

Pte. Ltd. 

327-329 Jalan Besar 

Singapore 208981 

Tel: 0065-29-88 600 

Fax: 0065-29-63 274 

Slovakia 

TMC spol.s.r.o. 

Masna 9 

656 58 Brno 

Tel: 00420-5-4821 45 72 

Fax: 00420-5-4821 72 19 


E-Mail: herramex@prodigy.net.mx 

E-Mail: smm@stormmartens.no 

Internet: http://www.stormmartens.no 

E-Mail: wemax@poczta.onet.pl 

E-Mail: singhvat@mbox4.singnet.com.sg


South Africa 

Duncan MacDonald & Co. Pty. 

P.O. Box 650066 

Benmore, 2010 

Tel: 0027-11-444 43 45 

Fax: 0027-11-444 50 59 

Spain 

Trans-Inter S.A. 

Feixa Llarga 20 

09907 L’Hospitalet de Llobregat 

Tel: 0034-93-261 81 10 

Fax: 0034-93-335 81 86 

Sweden 

Wedevag Tools AB 

Industrigatan 

5-71172 Vedevag 

Tel: 0046-581-261 00 

Fax: 0046-581-263 11 

Switzerland 

Schweizerische Maschinen Import 

AG 

Schanzstrasse 1 

8330 Pfäffikon 

Tel: 0041-1-953 20 20 

Fax: 0041-1-953 20 22 

Taiwan 

Hung Chih Ltd. Co. 

No 35 Chung Cheng Road 

Tainan 700 

Taiwan Republic of China 

Tel: 886-6-225 22 16 

Fax: 886-6-220 59 93 

Turkey 

Fikret Erdogan ve 

Ort. Koll. Sti. 

Pasmakçi Cayiri Caddesi No. 9 

TR-34030 Eyüp – Istanbul 

Tel: 0090-212-544 87 53 

Fax: 0090-212-567 99 66 


E-Mail: macduck@icon.co.za 

E-Mail: info@transinter.com 

Internet: http://www.transinter.com 

E-Mail: wedevag@wedevag.se 

Internet: http://www.wedevag.se 

E-Mail: info@smiag.ch 

Internet: http://www.tapmatic.ch/start.html 

E-Mail: fikreterdogan@superonline.com 

Internet: http://www.fikreterdogan.com 








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Manufacturers Bring Us 

Their Toughest Tapping Problems... 

And We've Turned Them Into 

Better Tools For You . 

Tapmatic has specialized in the development and production of tap 

drivers and self-reversing tapping attachments from its outset in 

1952. 48 years of experience and close cooperation with our 

customers resulted in the Constant Speed Tapping system. The 

Fastest Way To Tap On Any Machine. 

Our new RDT self-reversing tapping heads represent 5 years of real 

world experience in high production tapping with the highest speeds, 

the toughest materials- exotics, stainless, high silicon aluminum, deep 

blind holes with small roll form taps, adverse coolant conditions, etc. 

These new units produce faster cycle times, prevent external coolant 

entry, eliminate rust and corrosion problems, feature new planetary 

gears for simple programming- (100% feed rate in and out) and new 

balanced internal coolant system for maximum flow without seals. 

And, of course, CST for maximum tap life. 

http://www.tapmatic.com/hispeedtapping.html (1 of 3) [1/4/2004 12:05:24 PM]


Today, the only alternative to Constant Speed Tapping is synchronous 

feed tapping, a system designed around machine reversal, which 

requires the machine to reduce RPM as the synchronized feed rate is 

slowing down near the end of the stroke. Every machinist knows 

reducing RPM in the middle of a cut is bad for tool life. 

Synchronous feed also takes much more time especially since it 

requires 2 machine reversals for each tapped hole. Televised tests 

prove that Tapmatic's CST system taps twice as fast as the new full 

sized machining centers using synchronous feed at the same RPM. Ask 

for your FREE copy of the Tapmatic "Tapping 2000" video. You'll see 

that synchronous feed programming does not deliver the RPM it 

promises on the screen. Only CST does and... 

CST Tapping Heads 

Take A Big Load Off The Machine. 

Energy Consumption Comparison 

Test: Tap (144) 5/16" Holes 

Results: Tapmatic RDT uses 1/4th 

the energy of machine reversal and 

eliminates related machine wear and 

tear. 

CST is a modular system that allows Tapmatic to assemble a special 

tool to meet the manufacturers' specific requirements whether they 

be hard to reach holes, misalignment problems, precise thread depth 

or- You Tell Us at 800/854-6019. 

http://www.tapmatic.com/hispeedtapping.html (2 of 3) [1/4/2004 12:05:24 PM] 








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Work Piece 

All Applications 

Tap 


Machine Tool 

Manual Applications 

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● What are the size and depth of the hole? 

● Will it be a through or blind hole? 

● Is the hole drilled to the correct size? 

● Is the work piece rigidly held against rotation 

and upward movement? 

● If tapping a bottom-hole, does drilled depth 

allow for chamfer teeth of tap and sufficient 

clearance to keep tap from bottoming out in 

hole? 

● What is material and hardness of the work 

piece? 

● Do you have the correct tap design for the 

application? 

● What are the tap sizes and styles? 

● What material is the tap made from? 

● Is the tap sharp? 

● Is the tap properly aligned with the drilled 

hole? 

● Is there sufficient clearance between the tap 

and the hole to allow for retraction? 

● Who is tap manufacturer? What speed do they 

recommend for optimum performance of their 

tap in this material? 

● Is machine stop set so the tap releases in 

neutral to prevent bottoming? 

● Is the machine retraction correct for tapping 

attachment being used? 

● Is the torque control set to prevent tap 

breakage? 

● Is depth control set to correspond with 

machine stop to provide the total thread depth 

required and prevent bottoming?


CNC Applications 

● What type of machine is in use? 

● What is the horsepower? 

● What is the spindle taper? 

● What is the method of fixturing? 

● Are machine feed and speed set correctly? 

All Applications ● Is the proper cutting fluid or lubricant being 

used for lubricating the tap? 

Tapping 

Attachment 


● Is the correct Tapmatic tapping attachment 

being used for the specific job requirements? 

CNC Applications ● Is the machine retraction correct for the 

tapping attachment being used? 

Tapping Head 

Installation and 

Machine Set Up 



● Never perform any installation or 

programming, before reading the operator 

instructions accompanying the tapping 

attachment and the machine as well as 

the tap manufacturers' recommendations. 

● With a self-reversing tap chuck for manual or 

CNC operations, it is important to make sure 

that stop arm is strong enough to prevent 

torque bar from bending or deflecting. 

Machine torque bar must be stronger than 

largest tap. 

● Is clearance between the drilled hole and tap 

sufficient at start position to allow the tap to 

clear the hole upon retraction? 

● If a bottom hole is being tapped is there 

sufficient chip clearance? 

Manual Applications ● If torque control attachment is being used, is 

torque set correctly so that tap will not break if 

accidentally bottomed? 

● If depth control feature is employed, is it set 

correctly to cooperate with machine stop, 

provide total thread depth required and 

prevent engagement with bottom?



CNC Applications ● The machine retraction must be correct for the 

tapping attachment being used. 

● What is the feed rate? 

● What is the actual tapping speed? 

● What is the clearance plane height? 

● Is the potentiometer canceled? 

● Be sure to follow programming instructions for 

the tool. 

● When using a self-reversing head, has the 

ramp, dwell or exact stop been disabled? 








208.773.8048 / 800.854.6019 / Fax: 208.773.3021 






800x600 



General Problem: Dimensional Accuracy 

Specific Cause Solution 

Oversize 

Pitch 

Diameter 

Incorrect Tap 1. Use Proper GH limits of taps 

2. Use longer chamfered taps. 

Chip Packing 1. Use spiral point or spiral fluted taps. 

2. Reduce number of flutes to provide 

extra chip room. 

3. Use larger hole size. 

4. If tapping a blind hole, allow deeper 

holes where applicable or shorten 

the thread length of the parts. 

5. Use proper lubricant. 

Galling 1. Apply proper surface treatment such 

as steam oxide or chrome. 

2. Use proper cutting lubricant. 

3. Reduce tapping speed. 

4. Use proper cutting angle in 

accordance with material being 

tapped. 


Operating 

Conditions 

http://www.tapmatic.com/troubleshooting.html (1 of 8) [1/4/2004 12:05:27 PM] 

1. Apply proper tapping speed. 

2. Correct alignment of tap and drilled 

hole. 

3. Use proper tapping speed to avoid 

torn or rough threads. 

4. Use tapping attachment with axial 

compensation. 

5. Use proper tapping machine with 

suitable power. 

6. Avoid misalignment of the tap and 

drilled hole from loose spindle or 

worn holder.


Oversize 

Internal 

Undersize 

Pitch 

Undersize 

Internal 

Diameter 

Tool 

Conditions 

1. Obtain proper indexing angle for the 

flutes at the cutting edge. 

2. Grind proper cutting angle and 

chamfer angle. 

3. Avoid too narrow a land width. 

4. Remove burrs from regrinding. 

Hole Size 1. Use minimum hole size. 

2. Avoid tapered hole 

3. Use proper chamfered taps. 

Galling Galling solutions 1 through 4 can be 

applied to this specific problem. 

Incorrect Tap 1. Use Oversize taps. 

a. Use for cutting materials such 

as copper alloy, aluminum alloy 

and cast iron. 

b. Use for cutting tubing which will 

have "spring back" action after 

tapping. 

2. Apply proper chamfer angle. 

3. Increase cutting angle. 

Damaged 

Thread 

1. Use proper reversing speed to avoid 

damaging tapped thread on the way 

out of the hole. 

Leftover Chips 1. Increase cutting performance to 

avoid any left over chips in the hole. 

Hole Size 1. Use maximum drill size 

General Problem: Surface Finish 


Torn or 

Rough 

Thread 

Chamfer Too 

Short 

Wrong Cutting 

Angle 


1. Increase chamfer length. 

1. Apply proper cutting angle.


Chattering 

on Tapped 

Thread 

Galling 1. Use thread relieved taps. 

2. Reduce land width. 

3. Apply surface treatment such as 

steam oxide or chrome. 

4. Use proper cutting lubricant. 



7. Obtain proper alignment between 

tap and work. 

Chip Packing 1. Use spiral pointed or spiral fluted 

taps. 

2. Use larger drill size. 

Tool Condition 1. Avoid too narrow a land width. 

2. Do not grind the bottom of the flute. 

Tool Free 

Cutting 

General Problem: Tool Life 


Breakage Incorrect Tap 

Selection 

Excessive 

Tapping 

Torque 

Operating 

Condition 


1. Reduce cutting angle. 

2. Reduce amount of thread relief. 

1. Avoid chip packing in the flutes or 

the bottom of the hole. Use spiral 

pointed or spiral fluted taps or 

fluteless taps. 

2. Apply correct surface treatment 

such as steam oxide or bright. 

1. Use larger drill size. 

2. Try to shorten thread length. 

3. Increase cutting angle. 

4. Apply a tap with more thread relief 

and reduced land width. 

5. Use spiral pointed or spiral fluted 

taps. 


2. Avoid misalignment between tap 

and the hole and tapered hole. 

3. Use floating type of tapping holder. 

4. Use tapping holder with torque 

adjustment. 

5. Avoid hitting bottom of the hole with 

tap.


Chipping Incorrect Tap 

Selection 

Tool Condition 1. Do not grind bottom of the flute. 

2. Avoid too narrow a land width. 

3. Remove all worn sections when 

regrinding the flutes. 

4. Regrind tool more frequently. 

Operating 

Conditions 

Wear Incorrect Tap 

Selection 

Operating 

Conditions 

1. Reduce cutting angle. 

2. Use a different kind of high speed 

steel tap. 

3. Reduce hardness of the tap. 


5. Avoid chip packing in the flutes or in 

the bottom of the hole by using 

spiral fluted or spiral pointed taps. 


2. Avoid misalignment between tap 

and hole. 

3. Avoid sudden return of reverse in 

blind hole tapping. 

4. Avoid galling. 


1. Apply specially designed taps for 

tapping heat treated material. 

2. Change to a type of high speed steel 

tap that contains vanadium. 

3. Apply special surface treatment such 

as nitriding. 



2. Apply proper cutting lubricants. 

3. Avoid work hardened hole. 


Tool Condition 1. Grind proper cutting angle. 

2. Avoid hardness reduction from 

grinding process. 

General Problems Related To Tap Holder 


Tap stops 

before 

reaching 

required 

depth 

Clutch of X, R 

or TC/DC is 

slipping with 

new tap. 


1. Increase torque adjustment until a 

sharp tap can be driven to proper 

depth. Then add one half turn and 

lock adjustment


Tap pulls 

out of collet 

chuck. 


or TC/DC is 

slipping with 

dull tap. 


or TC/DC slips 

when fully 

tightened. 

The housing of 

the X, R or 

TC/DC stops 

rotating. 

Drive 

disengages 

and goes into 

neutral. 

The self-feed 

adjustment of 

TC/DC is set 

to minimum 

self-feed and 

drive goes into 

neutral. 

Tap chuck nut 

is not 

tightened 

securely. 

Tap square is 

not being 

driven 

properly. 

Back jaws for 

driving tap 

square are 

damaged. 


1. Change to new sharp tap. 

1. The torque required is too great for 

the tapping attachment. Use a 

larger model. 

2. Clutch may be worn and needs 

replacing. 

1. The torque required is too great for 

the machine and the machine 

spindle is stopping. A machine with 

more torque is needed. 

1. Set machine stop to allow tap to 

feed deeper into hole. 

1. Back off self-feed adjustment for 

more forward drive engagement and 

adjust machine stop. 

2. Note: There can be confusion 

between the clutch slipping and the 

drive going into neutral. You can 

determine what is occuring from the 

sound. With the R model, there is a 

loud ratcheting sound when the 

clutch slips. When the drive goes 

into neutral it is quiet. With the X or 

TC/DC model when the clutch slips 

there is no sound and when the 

drive goes into neutral there is a 

clicking sound. 

1. Be sure to follow operator 

instructions for installation of tap. 

1. Be sure to follow operator 

instructions for installation of tap. 

1. Replace back jaws and please see 

operator instructions for installation 

of tap.


Tap stops 

and starts 

chattering 

on the way 

out of the 

hole. 

Tap stops 

and starts 

chattering 

on the way 

out of the 

hole. 

Selfreversing 

tapping 

attachment 

does not 

reverse. 

Coolant has 

entered the 

housing of 

the tapping 

attachment. 

With X, R or 

TC/DC speed 

increases by 

1.75 times for 

reverse, 

operator is not 

feeding fast 

enough to 

keep up with 

tap. 

With RDT, ID 

or NCRT on a 

machining 

center, the 

feed rate is 

not keeping 

up with the 

tap. 

Stop arm is 

not installed 

or prevented 

from rotating. 

Tapping 

attachment is 

being flooded 

with external 

coolant. 

Internal 

Coolant 

system is 

leaking due to 

pressure build 

up. 


1. Retract the machine spindle at a 

faster rate with a smooth motion. 

1. Adjust machines feed rate correctly 

according to operator instructions. 

2. Be sure that potentiometer over ride 

control is canceled. Please see 

programming in operator 

instructions. 

3. Be sure that "Ramp" or "Exact Stop" 

is not in effect. Please see 

programming in operator 

instructions. 

1. Please see operator instructions for 

stop arm and torque bar installation. 

1. Try to avoid flooding tapping 

attachment itself. 

1. Please be sure not to exceed 

maximum recommended pressure. 

Please be sure outlet for coolant 

flow is adequate. Please see 

operator instructions.


Note: Coolant can be removed by using the following procedure. 









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800x600 



To avoid serious injury and ensure 

best result for your tapping operation, 

Please Read Carefully All operator and 

safety instructions provided for your 

tapping attachment as well as all other safety instructions that are applicable, 

especially those for your machine tool. 

1. Proper Clothing: The rotating spindle of a machine tool can snag loose 

fitting clothing, jewelry or long hair. Never wear jewelry, long sleeves, neckties, 

gloves or anything else that could become caught when operating a machine tool. 

Long hair must be restrained or netted to prevent it from becoming entangled in 

rotating spindle. Steel toed boots should also be worn in any machine 

environment. 

2. Proper Eye Protection: Always wear safety 

glasses with side shields to protect your eyes from flying 

particles. 

3. Proper Work Piece Fixturing: Never hold the 

work piece or the vise it is held in, by hand. The work 

piece must be clamped firmly to the table of the machine 

so that it cannot move, rotate or lift. 

http://www.tapmatic.com/tappingsafety.html (1 of 5) [1/4/2004 12:05:30 PM]


4. Proper Stop Arm / Torque Bar 

Installation 

For Self-Reversing Attachments On 

Conventional Machines: 

Quill Clamp Max Tap 

Capacity Order # Size 

1 1/2" - 2 3/8" 29099 1/2" 

2 3/8" - 4 1/2" 290991 3/4" 

Torque Bar Max Tap 

Assembly Order # Size 

Table Mount 29097 3/4" 

Heavy Duty 

Table Mount 29096 1 3/4" 

Never extend the length of the 

standard stop arm supplied with your 

tapping attachment. A lengthened stop 

arm could break free, hitting the 

operator and causing serious injury. 

Never hold the stop arm by hand. On reversal, full power 

of the machine is transmitted through the stop arm and the 

operator could be seriously injured. 

Always mount a torque bar to hold the tapping attachment's stop arm from 

rotating. The torque bar must be mounted securely to the table or quill of your 

machine. The torque bar installation must be stronger than the largest tap in the 

capacity range of your tapping attachment. 



7. Continuous High Production Manual Tapping: Models for use on 

conventional drill press or milling machines. Speed is a critical factor in tapping. 

Please always refer to recommended tapping speed chart. Tapmatic Torque 

Control Reversing Tapping Attachments employ a planetary gear reversing 

mechanism that increases speed by a 1.75 x 1 ratio. This means that a machine 

speed of 2,000 RPM results in a reversing speed of 3,500 RPM. It is strongly 

recommended that you consider the AVERAGE TAPPING SPEED rather than 

machine speed when calculating your cycle time. For example, if machine speed is 

1,500 RPM, reverse speed is 2,625 RPM, making your AVERAGE TAPPING 

SPEED 2,062 RPM. You must not exceed the maximum allowable speed marked 

on your tapping attachment. 

8. On Machining Centers: The same rule for installation applies whether 

using the torque bar holder assembly with stop arm, torque bar cup assembly or 

stop block assembly. "Always be sure that the installation is stronger than the 

largest tap being used." 

9. Always Be Aware Of The Potential Hazards Of A Machining 

Operation: Sometimes working with your machine can seem routine. You may 

find that you are no longer concentrating on the operation. A feeling of false 

security can lead to serious injury. Always be alert to the dangers of the 

machines with which you work. Always keep hands. Body parts, clothing, jewelry 

and hair out of the areas of operation, when the machine spindle is rotating. 

Areas of operation include the immediate point of machining and all transmission 

components including the tapping attachment. Never bring your hand, other body 

parts or anything attached to your body into any of these areas until the machine 

spindle is completely stopped. 

10. The tapping attachment housing, drive spindle and tap itself can 

become hot to the touch after operation. Use caution when removing the 

attachment from the machine of handling. 

http://www.tapmatic.com/tappingsafety.html (3 of 5) [1/4/2004 12:05:30 PM] 

11. Be aware of any other applicable safety instructions requirements. 

Check List For Good Tapping


1. Never use the tapping unit before reading all safety instructions for it 

as well as those for the machine it is to be used on. 

2. Is tap sharp and of correct design for current job? 

3. Is tap in proper alignment with drilled hole? 

4. Is machine speed correct? 

5. Is machine feed correct? 

6. Is machine stop set properly so tap releases in neutral rather than 

bottoming in work piece or fixture? 

7. Is work piece held rigidly against rotation and upward movement? 

8. Is clearance between the drilled hole and tap sufficient at start position 

to allow the tap to clear the hole upon retraction? 

9. Is the stop arm of the tapping attachment held rigidly against rotation 

by the torque bar extending from the machine? 

References for this Safety Information include but are not limited to: 

American National Standards Institute 

ANSI B11.8-1983 (Adopted May 31, 1983 by Department of Defense) 

Coastal Video Communications Corporation 

Machine Guarding Copyright 1994 

Society Of Manufacturing Engineers 

Tool and Manufacturing Engineers Handbook Volume 1 Machining 

(Library of Congress Catalog No. 82-060312) 

http://www.tapmatic.com/tappingsafety.html (4 of 5) [1/4/2004 12:05:30 PM] 








208.773.8048 / 800.854.6019 / Fax: 208.773.3021 








800x600 



Special Application Tools 

Tapmatic has helped some of the biggest companies in the world tap 

holes that seemed impossible. For a special requirement or to improve 

your tapping operation, please fill out and FAX or E-Mail this 

questionaire to Tapmatic and we'll quote a tool that will do the job. 

To Place An Order 

Please check our World Distribution for the Tapmatic Distributor 

nearest you. If you don't find a distributor in your area please call us 

at (800)854-6019. 

Literature Request 

See complete listing of available information, specifications or FREE 

Video. 

Repair Service 

Warranty Registration 

How Are We Doing? 

Please Let us know. 

Case Histories 

Please let us know about your successes with our tools. 

E-Mail 






http://www.tapmatic.com/customer_service/index.html (1 of 2) [1/4/2004 12:05:31 PM] 


802 Clearwater Loop / Post Falls, ID 83854


http://www.tapmatic.com/customer_service/index.html (2 of 2) [1/4/2004 12:05:31 PM] 

208.773.8048 / 800.854.6019 / Fax: 208.773.3021 






800x600 



http://www.tapmatic.com/contact.html (1 of 2) [1/4/2004 12:05:31 PM] 


802 Clearwater Loop, Post Falls, Idaho 83854 

Phones: 208/773-8048 

Service: 800/395-8231 

Sales: 800/854-6019, 

FAX: 208/773-3021 

E-mail: info@tapmatic.com 

Tapmatic International Corporation 

TIC AG, Alte Rheinstrasse 

CH-9451 Kriessern, Switzerland 

Phone: 011 41 757 5900, FAX: 011 41 71 757 5901 

E-mail: info@tapmatic.ch, Web: www.tapmatic.ch 

Tapmatic do Brazil, 

Industria e Comercio Ltda. 

Caixa Postal 1913, 01059-970 Sao Paulo-SP Brazil 

Phone: 011 55 11 3326 9979, FAX:011 55 11 3326 1288 

E-mail: tapmatic@amcham.com.br 








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800x600 



Quality Manufacturing 

TQM is an ISO 9001 Certified, quality driven 

company committed to total customer 

satisfaction. Your guarantee that your parts will 

meet all specifications. 

Equipment 

-Mori Seiki CNC Lathe/Mills SL200 SMC with Live 

Tooling and Sub Spindles 

-7BC CNC Lathes 3" through spindle, 12 Station Turrets 

-6BC CNC Lathes 2" through spindle, 12 Station 

Turret 

-American Way Gang Tooling CNC Lathe 

-Fadal VMC 40-20 machining centers with full 4th 

axis 

-Bridgeport Mills 

-Hardinge Chuckers 

-Burgmaster Turret Drills 

-Phoenix Automatic Horizontal Saw 

-Chevalier Sinker EDM 

-SMTW CNC Angle Head O.D. Grinder 

-Cincinnati I.D. Grinder 

-Johansson OD Grinder 

http://www.tapmatic.com/jobshop.html (1 of 2) [1/4/2004 12:05:33 PM] 

Contract Manufacturing 

Services 

With 50 years in the manufacturing 

business, producing a complete 

line of world class tapping 

equipment, the Tapmatic name is 

known around the world for quality 

products and customer service. 

Because we manufacture our own 

product, Tapmatic has the 

resources and know how to provide 

complete contract manufacturing 

services on schedule to exact 

specifications. 

-Complete Deburr Department with 

2 vibrator tumblers 

-Master Cam Version 7.1 with Cad 

Key support and DNC link to 

machines 

-Complete Assembly Department 

with (2) Control Laser Marking 

Machines 

-Complete temperature controlled 

Q.C. Room including Brown and 

Sharp CMM and Deltronic MPC-5 

Optical 

-Comparator and Louis Small 

Standard and Superficial Rockwell 

Tester 

-Visual Manufacturing Software 

with 15 user station and Bar Code 

Job Tracking 

Complete services can be


-Cincinnati R-7 OD Grinder 

-Excello Center Lap 

http://www.tapmatic.com/jobshop.html (2 of 2) [1/4/2004 12:05:33 PM] 

provided including these outside 

processes: 

Heat Treating 

Anodizing 

Black Oxide 

Other Surface Treatments 








208.773.8048 / 800.854.6019 / Fax: 208.773.3021 




Determining Correct Speed Within Specified Range 

Compilation of Guidelines From Tap Manufacturers And Other Sources 

For Cutting or Cold-Forming of Threads In Relation To Work Piece Material 

Cutting Speed For Tapping: Several factors, singly or in combination can cause very great differences in the permissible 

tapping speed. The principal factors affecting the tapping speed are the pitch of the thread, the chamfer length on the tap, 

the percentage of full thread to be cut, the length of the hole to be tapped, the cutting fluid used, whether the threads are 

straight or tapered, the machine tool used to perform the operation, and the material to be tapped. From Machinery’s Handbook 

23rd edition. 

If your coolant does not contain EP additives or its lubrication quality is low, start from the lower speeds in the range. Roll 

form taps in particular require good lubrication because of the high friction forces involved. As the lubrication quality of a 

coolant is often unknown, we recommend you start from the lower speeds in the range. 

These Factors Apply to Everyone’s Tapping Speed Charts 

Comparison Test Between Fastest Rigid Tapping 

Method And Constant Speed Tapping 

Ten Factors Requiring Ten Factors Permitting 

% 

Lower Speeds 

Higher Speeds + % 

-20 Poor Lubrication 1 Good Lubrication +20 Which Is Faster At The Same RPM? 

-15 High Tensile Strength 2 Low Tensile Strength +15 

Of Material Of Material 

-15 Large Thread Diameter 4 Small Thread Diameter +15 

-10 High Alloy Materials 3 Low Alloy Materials +10 

-10 Thread Depth 5 Thread Depth +10 

More Than 1.5 x Dia. 1.5 x Dia. Or Less 

-10 Thread Pitch Coarse 6 Thread Pitch Fine +10 

-5 Drill Size 7 Drill Size +5 

More than 65% of Thread 65% or Less Thread 

-5 Tap Lead 8 Tap Lead +5 

Less Than 3.5 Thread More Than 3.5 Threads 

-5 Blind Holes 9 Through Holes +5 

-5 Free Running Spindle 10 Synchronous Spindle +5 

Inaccurate Pitch Control Lead Screw 

Hydraulic/Air Feed CNC Control 

Example: From Chart 

Tap Size:1/4”-28 Coated, Material: Aluminum Die Cast, 688-1375 RPM RPM Spread = 687 

Minus Factors: High Tensile Strength -15 

Thread Depth 3 x Dia. -10 

Drill Size = 75% Thd. -5 

Blind Hole -5 

TOTAL -35 

Plus Factors: Coolant With Good EP +20 

Small Thread Diameter +15 

Pitch Fine +10 

Lead 3.5 Threads +5 

CNC Machine +5 

TOTAL +55 

Apply The Factors Against The RPM Spread of 687 

+.55 X 687 = 378 Added to minimum RPM 688 = 1066 New Mininimum RPM 

-.35 X 687 = 240 Substracted from maximum RPM 1375 = 1135 New Maximum RPM 

Common Sense Rule: Begin with min RPM and work up to optimum efficiency and tap life. 

TAPMATIC SFT, SynchroFlex, Rigid Tap Drivers 

Model RPM Capacity 

SFT10 Limited #2 - #10-32 

SFT50 

SFT75 

Only By 

Rigid 

#10 - 1/2” 

1/2”-13 - 3/4”-10 

SFT100 Tapping 

Program 

3/4”-10 - 1” 

TAPMATIC CST, Constant Speed, Self-Reversing Tapping Heads 

Model Spindle RPM Spindle RPM Capacity 

RDT15 HD and HS Heavy Duty 5000 RPM High Speed 6000 RPM (#0-#6, M1-M3) 

RDT25 HD and HS 

RDT50 HD and HS 

Heavy Duty 3500 RPM High Speed 4000 RPM (#4-1/4”, M2.5-M6) 

Heavy Duty 2000 RPM High Speed 2500 RPM (#10-1/2”, M4.5-M12) 

RDT75 1500 RPM (#3/8”-3/4”, M10-M20) 

RDT85 1200 RPM (#1/2”-1”, M12-M25) 

Tools come with Popular Inch & Metric Size Straight Shanks adaptable to CAT, BT and HSK. 

All sizes available. See Price List. 

49.8 HPM* 

Sec. 

59.8 HPM* 

Sec. 

1999 Hi-Speed Tapping Center Tapmatic & 1996 Machining Center 

TEST: (10) 6mm Roll Form Holes, 9mm Deep, 2500 RPM, 7075 Aluminum 

Even when the tapping center’s RPM was increased to 4000, it didn’t produce more 

*Holes Per Minute (HPM) than Tapmatic at 2500. SEND FOR COPY OF THIS VIDEO. 

Seven Essential Steps 

For Trouble Free Performance 

With Self-Reversing Tapping Heads 

1. Choose the proper tap: Follow your tap manufacturers 

recommendations for your specific application. 

2. Calculate the correct tapping speed from the adjacent 

charts and the rules on this page. 

3. Common sense rule: Begin conservatively and increase 

speed until optimum results are obtained. 

4. Select the best tool for your application or applications. High 

production with one tap size (Don’t compromise), low production 

with a variety of taps, (Choose the tool that best covers range.) 

5. Follow our programming instructions exactly, and 

absolutely make sure ramp or exact stop has been eliminated 

from tapping cycle. Leaving it in will increase tapping time 30% 

increase thread depth variations substantially, and wear out the 

tapping head prematurely. 

6. Follow our installation instructions exactly and lock orientation 

collar in place once stop arm is in proper position. Then fix it 

positively with the locking screw provided. 

7. Schedule preventative maintenance. Disassembly, cleaning, 

re-lubricating, and reassembly takes no more than half an hour. 

Just consider what the head does for the machine by eliminating 

its reversal related wear and tear. Simple maintenance will keep 

the head working efficiently, and pay big dividends in trouble free 

production. 

TAPMATIC CORPORATION: ISO ISO 9001 9001 CERTIFIED- CERTIFIED:- 802 Clearwater Loop, Post Falls, ID 83854, 208/773-8048, FAX: 208/773-3021, www.tapmatic.com 4

Speed Recommendations & Tool Selection 

Standard Taps 

M2 

M3 

M4 

M5 

M6 

M7 

Tap Size 

0 

1 

2 

3 

4 

5 

6 

8 

10 

12 

1/4 

M8 5/16 

M9 

3/8 

M10 

7/16 

M12 

1/2 

M14 

9/16 

M16 

5/8 

M18 

3/4 

M20 

M22 

7/8 

M24 

M25 1 

Low Carbon 

Steel, Medium 

Carbon Steel 

High Carbon 

Steel, High 

Strength Steel 

Tool Steel 

High Strength 

Steel, Tool 

Steel Hardened 

25-50 

50-80 

1592-3183 

3183-5093 

RDT15HS 

6-30 

10-35 

382-1910 

637-2228 

RDT15HD 

Stainless 303, 

304, 316 

6-12 12-35 

20-50 

382-764 

RDT15HD 

764-2228 

1273-3183 

RDT15HD 


430, 17-4 

Hardened 

Stainless 17-4 

Annealed 

Titanium 

Alloys 

Surface Feet Per Minute 

12-15 12-15 

12-25 

1308-2617 314-1570 314-628 628-1831 628-785 628-785 157-785 523-785 2617-3401 2093-3401 

1570-3401 2617-3140 1831-2617 

2617-4186 523-1831 382-764 1047-2617 

628-1308 

2355-4710 2355-5233 

3401-5233 2617-3401 

RDT15HS RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HS RDT15HS RDT15HD RDT15HS RDT15HD 

1110-2221 267-1333 314-628 533-1555 533-666 533-666 133-666 444-666 2221-2887 1777-2887 

1333-2887 2221-2665 1555-2221 

2221-3554 444-1555 

888-2221 

533-1110 

1999-3999 1999-4442 

2887-4442 2221-2887 

RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD RDT15HD 

964-1929 231-1157 231-463 463-1351 463-579 463-579 116-579 386-579 1929-2508 1543-2508 

1157-2508 1929-2315 1351-1929 

1929-3086 386-1351 

772-1929 

463-964 

1736-3472 1736-3858 

2508-3858 1929-2508 


853-1705 205-1023 205-409 409-1194 409-512 409-512 102-512 341-512 1705-2217 1364-2217 

1023-2217 1705-2046 1194-1705 

1705-2728 341-1194 

682-1705 

409-853 

1535-3069 1535-3411 

2217-3411 1705-2217 


764-1528 183-917 183-367 367-1070 367-458 367-458 92-458 306-458 1528-1986 1222-1986 

917-1986 1528-1833 1070-1528 

1528-2445 306-1070 

611-1528 

367-764 

1375-2750 1375-3056 

1986-3056 1528-1986 


691-1382 166-829 166-332 332-969 332-415 332-415 83-415 277-415 1382-1799 1106-1799 

829-1799 1382-1658 969-1382 

1382-2211 277-969 

553-1382 

332-691 

1246-2487 1246-2764 

1799-2764 1382-1799 


583-1165 140-699 140-280 280-815 280-349 280-349 70-349 233-349 1165-1514 932-1514 

699-1514 1165-1398 815-1165 

1165-1864 233-815 

466-1165 

280-583 

1048-2097 1048-2330 

1514-2330 1165-1514 


502-1005 121-603 121-241 241-704 241-302 241-302 60-302 201-302 1005-1307 804-1307 

603-1307 1005-1205 704-1005 

1005-1607 201-704 

402-1005 

241-502 

905-1808 905-2009 

1307-2009 1005-1307 


442-884 106-531 106-212 212-619 212-265 212-265 53-265 177-265 884-1150 707-1150 

531-1150 884-1061 619-884 

884-1415 177-619 

354-884 

212-442 

796-1592 796-1769 

1150-1769 884-1150 


382-764 92-458 92-183 183-535 183-229 183-229 46-229 153-229 764-993 611-993 

458-993 764-917 535-764 

764-1222 153-535 

306-764 

183-382 

688-1375 688-1528 

993-1528 764-993 


306-611 73-367 73-147 147-429 147-184 147-184 37-184 122-184 611-796 489-796 

367-796 611-733 429-611 

611-978 122-429 

245-611 

147-306 

551-1100 551-1222 

796-1222 611-796 


255-509 61-306 61-122 122-357 122-153 122-153 31-153 102-153 509-662 407-662 

306-662 509-611 357-509 

509-815 102-357 

204-509 

122-255 

458-917 458-1019 

662-1019 509-662 


219-437 52-262 52-105 105-306 105-131 105-131 26-131 87-131 437-568 349-568 

262-568 437-524 306-437 

437-698 87-306 

175-437 

105-219 

393-786 393-873 

568-873 437-568 

RDT50 RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT50HD RDT50HD RDT85HS RDT50HD RDT85HS 

191-382 46-229 46-92 92-267 92-115 92-115 23-115 76-115 382-497 306-497 

229-497 382-458 267-382 

382-611 76-267 

153-382 

92-191 

344-688 344-764 

497-764 382-497 

RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS 

172-344 41-206 41-82 82-238 82-102 82-102 20-102 68-102 344-442 275-442 

206-442 344-412 238-344 

344-550 68-238 

137-344 

82-172 

306-619 306-687 

442-687 344-442 

RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS RDT85HS 

153-306 37-183 37-73 73-214 73-92 73-92 18-92 61-92 306-397 244-397 

183-397 306-367 214-306 

306-489 61-214 

122-306 

73-153 

275-550 275-611 

397-611 306-397 

RDT85 RDT85 RDT85 RDT85 RDT85 RDT85 RDT85 RDT85 RDT85 RDT85 RDT85 RDT85 RDT85 RDT85 

128-255 31-153 31-61 61-178 61-76 61-76 15-76 51-76 255-331 203-331 

153-331 255-306 178-255 

255-407 51-178 

102-255 

61-128 

229-458 229-509 

331-509 255-331 


109-218 26-131 26-52 52-153 52-65 52-65 13-65 44-65 218-284 175-284 

131-284 218-262 153-218 

218-350 44-153 

87-218 

52-109 

196-392 196-437 

284-437 218-284 


96-191 23-115 23-46 46-134 46-57 46-57 11-57 38-57 191-248 153-248 

115-248 191-230 134-191 

191-306 38-134 

76-191 

46-96 

172-344 172-382 

248-382 191-248 


TAPMATIC CORPORATION: ISO ISO 9001 9001 CERTIFIED:- 802 Clearwater Loop, Post Falls, ID 83854, 208/773-8048, FAX: 208/773-3021, www.tapmatic.com 

Nickel Base 

Alloys 

RPM Range Uncoated 

RPM Range Coated 

Recommended Tapmatic Attachment 

764-955 

RDT15HD 

764-955 

764-1592 

RDT15HD 

Aluminum 

Alloys 

Aluminum 

Die Cast 

Magnesium 

Uncoated Tap 

Coated Tap 

3-15 10-15 50-65 40-65 

45-90 45-100 

191-955 

RDT15HD 

637-955 

RDT15HD 

3183-4138 

RDT15HS 

2546-4138 

2865-5730 

RDT15HS 

2865-6000 

RDT15HS 

Brass, Bronze 

Copper 

30-65 50-60 

65-100 

1910-4138 

RDT15HS 

3183-3820 

4138-6000 

RDT15HS 

Cast Iron 

35-50 

50-65 

2228-3183 

3183-4138 

RDT15HS 

5

Speed Recommendations & Tool Selection 

Roll Form Taps High Speed / Top Speed Taps 

M2 

M3 

M4 

M5 

M6 

M7 

M9 

M12 

M16 

M18 

M20 

Tap Size 

0 

1 

2 

3 

4 

5 

6 

8 

10 

12 

1/4 

M8 5/16 

3/8 

M10 

7/16 

1/2 

M14 

9/16 

5/8 

3/4 

Low Carbon 

Steel, Medium 

Carbon Steel 

30-50 

65-100 

1910-3183 

4138-6000 

RDT15HS 

1570-2617 

3401-5233 

RDT15HS 

1333-2221 

2887-4442 

RDT15HD 

1157-1929 

2508-3858 

RDT15HD 

1023-1705 

2217-3411 

RDT25HD 

917-1528 

1986-3056 

RDT25HD 

829-1382 

1799-2764 

RDT25HD 

699-1165 

1514-2330 

RDT25HD 

603-1005 

1307-2009 

RDT25HD 

531-884 

1150-1769 

RDT50HD 

458-764 

993-1528 

RDT50HD 

367-611 

796-1222 

RDT50HD 

306-509 

662-1019 

RDT50HD 

262-437 

568-873 

RDT85HS 

229-382 

497-764 

RDT85 

206-344 

442-687 

RDT85 

183-306 

397-611 

RDT85 

153-255 

331-509 

RDT85 

High Carbon 

Steel, High 

Strength Steel 

191-497 

RDT85 

172-442 

RDT85 

153-397 

RDT85 

128-331 

RDT85 

Tool Steel 

1592-4138 

RDT15HD 

1308-3401 

RDT15HD 

1110-2887 

RDT15HD 

964-2508 

RDT15HD 

853-2217 

RDT25HD 

764-1986 

RDT25HD 

691-1799 

RDT25HD 

583-1514 

RDT25HD 

502-1307 

RDT25HD 

442-1150 

RDT50HD 

382-993 

RDT50HD 

306-796 

RDT50HD 

255-662 

RDT50HD 

219-568 

RDT85HS 


304, 316 

Uncoated Tap 

Coated Tap 

20-25 25-40 35-50 

25-65 25-35 

50-65 

RPM Range Uncoated 

RPM Range Coated 



1273-1592 

1592-2228 

RDT15HD 

1047-1308 

1308-1831 

RDT15HD 

888-1110 

1110-1555 

RDT15HD 

772-964 

964-1351 

RDT15HD 

682-853 

853-1194 

RDT25HD 

611-764 

764-1070 

RDT25HD 

553-691 

691-969 

RDT25HD 

466-583 

583-815 

RDT25HD 

402-502 

502-704 

RDT25HD 

354-442 

442-619 

RDT50HD 

306-382 

382-535 

RDT50HD 

245-306 

306-429 

RDT50HD 

204-255 

255-357 

RDT50HD 

175-219 

219-306 

RDT85HS 

153-191 

191-267 

RDT85 

137-172 

172-238 

RDT85 

122-153 

153-214 

RDT85 

102-128 

128-178 

RDT85 

Titanium 

Alloys 

964-1543 1351-1929 

1929-2508 

RDT15HD RDT15HD 

853-1364 1194-1705 

1705-2217 1194-2217 

RDT25HD RDT25HD RDT25HD 

764-1222 1070-1528 

1528-1986 1070-1986 


691-1106 969-1382 

1382-1799 969-1799 


583-932 815-1165 

1165-1514 815-1514 


502-804 704-1005 

1005-1307 704-1307 


442-707 619-884 

884-1150 619-1150 


382-611 535-764 

764-993 535-993 


306-489 429-611 

611-796 429-796 


255-407 

RDT50HD 

219-349 

RDT85HS 

191-306 

RDT85 

172-275 

RDT85 

153-244 

RDT85 

128-203 

RDT85 

Aluminum 

Alloys 

1592-2546 2228-3183 

3183-4138 


1308-2093 1831-2617 

2617-3401 


1110-1777 1555-2221 

2221-2887 


357-509 

509-662 

RDT50HD 

306-437 

437-568 

RDT85HS 

267-382 

382-497 

RDT85 

238-344 

344-442 

RDT85 

214-306 

306-397 

RDT85 

178-255 

255-331 

RDT85 

Aluminum 

Die Cast 

35-65 

2228-4138 

RDT15HD 

1831-3401 

RDT15HD 

1555-2887 

RDT15HD 

1351-2508 

RDT15HD 

357-662 

RDT50HD 

306-568 

RDT85HS 

267-497 

RDT85 

238-442 

RDT85 

214-397 

RDT85 

178-331 

RDT85 

M2 

M3 

M4 

M5 

M25 

Tap Size 

0 

1 

2 

3 

4 

5 

6 

8 

10 

12 

M6 

1/4 

M7 

M8 5/16 

M9 

3/8 

M10 

7/16 

M12 

1/2 

M14 

9/16 

M16 5/8 

M18 

3/4 

M20 

M22 

7/8 

M24 

1 

10505-12733 1592-6366 1910-5093 1273-2546 4138-12733 4138-6366 6366-8276 6366-8276 8276-10505 

6000 1592-6000 

4138-6000 4138-6000 6000 6000 6000 

RDT15HS RDT15HS RDT15HS RDT15HD RDT15HS RDT15HS RDT15HS RDT15HS RDT15HS 

8634-10465 1308-5233 1570-4186 1047-2093 3401-10465 3401-5233 5233-6808 5233-6808 6808-8634 

6000 3401-6000 5233-6000 5233-6000 6000 

7329-8884 1110-4442 1333-3554 888-1777 2887-8884 2887-4442 4442-5774 4442-5774 5774-7329 

5000 2887-5000 4442-5000 4442-5000 5000 

6367-7717 964-3858 1157-3086 772-1543 2508-7717 2508-3858 3858-5015 3858-5015 5015-6367 

5000 2508-5000 3858-5000 3858-5000 5000 

5628-6821 853-3411 1023-2728 682-1364 2217-6821 2217-3411 3411-4434 3411-4434 4434-5628 

5000 2217-5000 4434-5000 

5042-6122 764-3056 917-2445 611-1222 1986-6122 1986-3056 3056-3973 3056-3973 3973-5042 

4000 1986-4000 3973-4000 

4567-5536 691-2764 829-2211 553-1106 1799-5536 1799-2764 2764-3592 2764-3592 3592-4567 

4000 1799-4000 3592-4000 

TAPMATIC CORPORATION: ISO ISO 9001 9001 CERTIFIED- CERTIFIED:- 802 Clearwater Loop, Post Falls, ID 83854, 208/773-8048, FAX: 208/773-3021, www.tapmatic.com 

Low Carbon 

Steel, Medium 

RDT15HS 

RDT15HD 

RDT15HD 

RDT25HS 

RDT25HS 

2918-3537 

RDT25HS 

2521-3056 

RDT25HD 

2017-2449 

RDT50HS 

1681-2037 

RDT50HS 

1441-1748 

RDT50HD 

1261-1528 

RDT50HD 

1121-1359 

RDT85HS 

1008-1222 

RDT85HS 

840-1019 

RDT85 

720-873 

RDT85 

630-764 

RDT85 

Carbon Steel 

165-200 

442-1769 

RDT25HD 

382-1528 

RDT50HD 

306-1222 

RDT50HD 

255-1019 

RDT50HD 

219-873 

RDT50HD 

191-764 

RDT85HS 

172-687 

RDT85HS 

153-611 

RDT85 

128-509 

RDT85 

109-437 

RDT85 

96-382 

RDT85 

531-1415 

RDT25HD 

458-1222 

RDT50HD 

367-978 

RDT50HD 

306-815 

RDT50HD 

262-698 

RDT50HD 

229-611 

RDT85HS 

206-550 

RDT85HS 

183-489 

RDT85 

153-407 

RDT85 

131-350 

RDT85 

115-306 

RDT85 

RDT25HD 

RDT25HD 

RDT25HD 

RDT25HD 

RDT25HD 

354-707 

RDT25HD 

306-611 

RDT50HD 

245-489 

RDT50HD 

204-407 

RDT50HD 

175-349 

RDT50HD 

153-306 

RDT85HS 

137-275 

RDT85HS 

122-244 

RDT85 

102-203 

RDT85 

87-175 

RDT85 

76-153 

RDT85 

RDT15HD 

RDT25HS 

RDT25HS 

3843-4659 583-2330 699-1864 466-932 1514-4659 

3843-4000 1514-4000 

RDT25HS 

RDT25HS 

3317-4021 502-2009 603-1607 402-804 1307-4021 

3317-4000 1307-4000 

RDT25HS 

High Carbon 

Steel, High 

Strength Steel, 

25-100 

RDT15HS 

RDT15HD 

RDT25HD 

RDT25HD 

RDT25HD 

RDT25HD 

RDT25HD 

Tool Steel 


304, 316 

30-80 

RDT15HS 

RDT15HD 

RDT25HD 

RDT25HD 

RDT25HD 

RDT25HD 

RDT25HD 

Stainless 17-4 

Annealed 


20-40 

RDT15HD 

RDT15HD 

Aluminum 

Alloys 

65-200 

RDT15HS 

RDT15HD 

RDT25HS 

1150-3537 

RDT25HS 

993-3056 

RDT25HD 

796-2449 

RDT50HS 

662-2037 

RDT50HS 

568-1748 

RDT50HD 

497-1528 

RDT50HD 

442-1359 

RDT85HS 

397-1222 

RDT85HS 

331-1019 

RDT85 

284-873 

RDT85 

248-764 

RDT85 

Aluminum 

Die Cast 

65-100 

RPM Range Based on SFM 

RPM Range For Tapping Head if Different 


RDT15HS 

RDT15HD 

RDT25HD 

RDT25HD 

RDT25HD 

1514-2330 

RDT25HD 

1307-2009 

RDT25HD 

1150-1769 

RDT25HD 

993-1528 

RDT25HD 

796-1222 

RDT50HD 

662-1019 

RDT50HD 

568-873 

RDT50HD 

497-764 

RDT85HS 

442-687 

RDT85HS 

397-611 

RDT85 

331-509 

RDT85 

284-437 

RDT85 

248-382 

RDT85 

Magnesium 

100-130 

RDT15HS 

RDT15HD 

RDT15HD 

RDT25HS 

RDT25HS 

2330-3029 

RDT25HD 

2009-2612 

RDT25HD 

1769-2300 

RDT25HD 

1528-1986 

RDT25HD 

1222-1589 

RDT50HD 

1019-1324 

RDT50HD 

873-1135 

RDT50HD 

764-993 

RDT85HS 

687-893 

RDT85HS 

611-794 

RDT85 

509-662 

RDT85 

437-568 

RDT85 

382-497 

RDT85 

Copper 

100-130 

RDT15HS 

RDT15HD 

RDT15HD 

RDT25HS 

RDT25HS 

2330-3029 

RDT25HD 

2009-2612 

RDT25HD 

1769-2300 

RDT25HD 

1528-1986 

RDT25HD 

1222-1589 

RDT50HD 

1019-1324 

RDT50HD 

873-1135 

RDT50HD 

764-993 

RDT85HS 

687-893 

RDT85HS 

611-794 

RDT85 

509-662 

RDT85 

437-568 

RDT85 

382-497 

RDT85 

Cast Iron 

130-165 

RDT15HS 

RDT15HD 

RDT15HD RDT25HS RDT25HD RDT25HD RDT15HD RDT25HS RDT15HD RDT15HD RDT15HD 

RDT15HD 

RDT25HS 

RDT25HS 

3029-3843 

RDT25HS 

2612-3317 

RDT25HD 

2300-2918 

RDT25HD 

1986-2521 

RDT25HD 

1589-2017 

RDT50HS 

1324-1681 

RDT50HD 

1135-1441 

RDT50HD 

993-1261 

RDT50HD 

893-1121 

RDT85HS 

794-1008 

RDT85HS 

662-840 

RDT85 

568-720 

RDT85 

497-630 

RDT85 

6

Tapmatic Corporation - Drill Selection: Inches / Metric 


800x600 



For Inch/Metric Taps & Decimal 

Equivalents 

Note: Most drill size charts are based on using standard job drills which can 

drill over size by approximately .003. These charts are based on .003 over size 

condition to achieve the proper percentages of thread. With today's high precision 

drills, they are now capable of drilling to near net size. When using a high 

precision drill or a "G" drill you should refer to the drill size formula's in the 

"Tapping Formulas" section. 

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Tapmatic Corporation - Drill Selection: Forming Taps 


800x600 



For Forming Taps and Decimal 

Equivalents 

Because the thread produced by a cold forming tap is stronger than a 

conventional thread in most materials, it is highly recommended that 65% be 

taken as the proper percentage in using this tool. Much greater tool life and 

efficiency may be expected when tapping 65% of thread or less. 

Note: It is important that tap drill charts for conventional taps should not be used 

for cold forming taps. 

Drill Size Calculation Example 

Example 1/4-20 

% of thread (given) =65 

Threads per inch =20 

Then: Drill Size =.250 -.0068 x 65 

20 

Drill Size =.250 - .0220 

Drill Size =.2280 or #1 Drill 

Reference Charts: 

- Drill Selection for forming taps and Decimal Equivalents 

- Metric Roll Forms 








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Tapmatic Corporation - Drill Selection: Forming Taps 


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Tapmatic Corporation - Drill Size Factors 


800x600 



● Tapped holes deeper than 1.5 diameters often call for a larger 

tap drill. 

● Blind holes often require larger tap drills to reduce loads on the 

tap caused by chip buildup in the hole. 

● Materials that tend to gall when tapped or when fasteners are 

installed should have larger drilled holes. 

● Under tapping pressure, soft materials tend to extrude and enter 

the root area, necessiating a larger drilled hole. 

● Materials that don't readily dissipate heat, should have larger 

holes to reduce the tooth contact area and minimize heat build 

up. 

● When making threads with high helix angles using a larger tap 

drill will help reduce tap breakage. 








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Tapmatic Corporation - Drill Size Factors 

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Tapmatic Corporation - Drill Depth Clearance Blind Holes 


800x600 



Chamfer Teeth + One Pitch + 1mm = Clearance 

● Bottom Tap has 1 to 2 pitches in chamfer. 

● Semi Bottom Tap has 2 to 3 pitches in chamfer. 

● Modified Bottom Tap has 2 to 4 pitches in chamfer. 

● Plug Tap has 3 to 5 pitches in chamfer. 

● Modified Plug Tap has 5 to 7 pitches in chamfer. 

● Roll Form Tap has 2 1/2 pitches in chamfer. 

Example: 

1/4-20 Roll form tap 1/2" deep 

Chamfer Teeth = 2 1/2 x pitch (.050) = .125 

Chamfer Teeth + one pitch + 1 mm = drill depth clearance 

.125 + .050 + .039 = .214 (Drill Depth Beyond 1/2" Deep Full 

Threads) 






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Tapmatic Corporation - Drill Depth Clearance Blind Holes 

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Tapmatic Corporation - Tap Recommendations For Specific Materials 


800x600 



Tap Manufacturers offer their own unique geometries for specific materials and 

applications. This chart is meant to provide general information. For a specific tap 

recommendation for your application, please consult your tap supplier. 

Standard Straight Fluted Tap 

With 6 to 8 Threads Chamfer Length or Lead. 

These taps do not transport the chips out of the 

hole. For this reason, they should not be used for 

deep hole tapping. They work best in shallow 

depth through holes and in materials that produce 

short chips. 

Straight Fluted Taps With Spiral Point 

With 3.5 to 5 Threads Chamfer Length or 

Lead. 

These taps push the chips forward. The chips are 

curled up to prevent clogging in the flutes. They 

are used for through holes. 

http://www.tapmatic.com/tech_manual/tap_recommendations.html (1 of 5) [1/4/2004 12:05:41 PM] 

Workpiece 

Materials 

Recommended 

Tap Surface 

Treatments 

Cast Iron Nitrided or TiN 

Brass, Short 

Chipping 

Nitrided 

Cast Aluminum Nitrided 

Short Chip 

Hard 

Workpiece 

Materials 

Aluminum 

Long Chip 

Nitrided or TiN 

Recommended 

Tap Surface 

Treatments 

Bright, or Cr or 

TiN 

Exotic Alloys Nitrided or TiN 

Stainless Steel Nitrided or TiN 

Steel Bright or TiN 

or TiCN


Left Hand Spiral Fluted Tap 

With Approximately 12 Degrees 

Spiral Flutes With 3.5 to 5 Threads Chamfer 

Length. 

These taps are mostly used in thin walled parts or 

for holes interrupted by cross holes or longitudinal 

slots. 

Right Hand Spiral Fluted Tap 

With Approximately 15 Degrees 

Spiral Flutes With 3.5 to 5 Threads Chamfer 

Length. 

The spiral flutes transport chips back out of the 

hole. These taps are used in blind holes less than 

1.5 times the tap diameter deep with materials 

that produce short chips. 

Right Hand Spiral Fluted Tap 

With 40 Degrees to 50 Degrees Spiral Flutes. 

The greater helix angle provides good transport of 

chips back out o the hole. These taps are used 

only in blind holes in materials that produce long 

chips. They can also be used in deeper holes up to 

3 times the tap diameter. 

http://www.tapmatic.com/tech_manual/tap_recommendations.html (2 of 5) [1/4/2004 12:05:41 PM] 

Workpiece 

Materials 

Aluminum 

Long Chip 

Recommended 

Tap Surface 

Treatments 

Bright, or Cr 

or TiN 

Exotic Alloys Nitrided or 

TiN 

Stainless 

Steel 

Nitrided or 

TiN 

Steel Bright or 

TiN or TiCN 

Workpiece 

Materials 

Cast 

Aluminum 

Recommended 

Tap Surface 

Treatments 

Nitrided 

Titanium Nitrided or 

TiN 

Stainless 

Steel 

Bright or 

TiN 

Steel Bright or 

TiN or TiCN 

Workpiece 

Materials 

Aluminum 

Long Chip 

Stainless 

Steel 

Steel Alloy 

Cr-Ni 

Soft 

Material 

Recommended 

Tap Surface 

Treatments 

Bright, or Cr 

or TiN 

Bright or 

TiN 

Bright or 

TiN or TiCN 

Bright


Rake Angle 

The best rake angle for a tap 

depends on the material. Materials 

that produce long chips normally 

require a tap with greater rake angle. 

Materials that produce short chips 

require a smaller rake angle. Difficult 

materials like Titanium or Inconnell 

require a compromise between 

greater rake angle for longer chips 

and smaller rake angle for more 

strength. 

Relief Angle In The Lead Of A Tap 

A small relief angle can be used in soft materials. Harder materials like stainless 

steel can be cut easier with a tap having a greater relief angle which reduces the 

friction. Tough materials like Inconnel and nickel can be cut more easily with an 

even greater angle. 

The relief angle is smaller on taps for blind holes that on taps for through holes 

so that the chip root can be sheared off when the tap reverses without breaking 

the taps cutting edge. 

Chamfer Length (Lead) 

The actual cutting of the thread is done by the lead of the tap. When there are 

more threads in the chamfer length or lead the torque is reduced, producing the 

thread is much easier, and the life of the tap will be increased. In blind holes 

where there is not enough room to drill deep enough for a tap with a longer 

lead, taps with short leads are used. In some cases the lead of the tap is 

reduced to as little as 1.5 threads. This greatly increases torque and reduces tap 

life. Even when using taps with shortened lead it is still important to drill deep 

enough for adequate clearance. It is recommended to allow one thread length 

plus one mm beyond the lead of the tap as drill clearance. 

Relief Angle In The Thread Profile (Pitch Diameter Relief) 

The relief angle effects true to gage thread cutting, and also the free cutting 

ability and life of the tap. It has an effect on how the tap is guided when it 

enters the hole. If the relief angle is too great pitch guidance and self centering 

of the tap can not be guaranteed especially in soft materials. In materials like 

stainless steel or bronze the relief angle should be larger to allow free cutting 

and to allow more lubrication to reach the cutting and friction surfaces. A bigger 

relief angle can allow higher tapping speed provided the tap is guided 

concentrically into the hole by the machine and tap holder. 

http://www.tapmatic.com/tech_manual/tap_recommendations.html (3 of 5) [1/4/2004 12:05:41 PM]


Roll Form Taps 

Workpiece 

Materials 

All Ductile Materials 

Recommended 

Tap Surface 

Treatments 

These taps form the thread rather than cut. Since no chips are produced they can 

be used in blind or through holes. Cold forming is possible in all ductile materials. 

Advantages include no waste in the form of chips, no mis-cutting of threads, no 

pitch deviation, higher strength, longer tool life, and higher speed. Please note 

that the core hole diameter must be larger than with a cutting tap. Good 

lubrication is important , more torque is required, and the minor diameter of the 

thread will appear rough due to forming process. 








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Tapmatic Corporation - Illustrations of Tap Terms 


800x600 



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Tapmatic Corporation - Tap & Screw Thread Nomencalture 


800x600 



Allowance: The minimum clearance or maximum interference which is intended 

between mating parts. 

Angle of thread: The angle included between the flanks of a thread measured in 

an axial plane. 

Back of taper: A slight taper on threaded portion of the tap making the pitch 

diameter near the shank smaller than that at the chamfer. 

Basic: The theoretical or nominal standard size from which all variations are 

made. 

Chamfer: The tapered and relieved cutting teeth at the front end of the threaded 

section. Common types of chamfer are: Taper, 8 to 10 threads long; Plug, 3 to 5 

threads and Bottoming, 1.5 threads. 

Crest: The top surface joining the two sides or flanks of a thread. 

Cutting face: The leading side of the land. 

Flute: The longitudinal channels formed on a tap to create cutting edges on the 

thread profile. 

Heel: The following side of the land. 

Height of thread: In profile, distance between crest and bottom section of 

thread measured normal to the axis. 

Hook face: A concave cutting face of the land. This may be varied for different 

materials and conditions. 

Interrupted thread: Alternate teeth are removed in the thread helix on a tap 

having an odd number of flutes. 

Land: One of the threaded sections between the flutes of a tap. Lead of thread: 

The distance a screw thread advances axially in one turn. 

Major diameter: The largest diameter of the screw or nut on a straight screw 

head. 

Minor diameter: The smallest diameter of the screw or nut on a straight screw 

head. 

Neck: The reduced diameter; on some taps, between the threaded portion and 

the shank. 

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Pitch: The distance from a point on one thread to a corresponding point on the 

next thread, measured parallel to the axis. 

Pitch diameter: On a straight screw thread, the diameter of an imaginary 

cylinder where the width of the thread and the width of the space between 

threads is equal. 

Point diameter: The diameter at the leading end of the chamfered portion. 

Radial: The straight face of a land, the plane of which passes through the axis of 

the tap. 

Rake: The angle of the cutting face of the land in relation to an axial plane 

intersecting the cutting face at the major diameter. 

Relief: The removal of metal behind the cutting edge to provide clearance 

between the part being threaded and a portion of the threaded land. Also, see 

back taper. 

Chamfer Relief: The gradual decreasing land height from cutting 

edge to heel on the chamfered portion of the tap land to provide 

radial clearance for the cutting edge. 

Con-Eccentric Relief: Radial relief in the thread form starting back 

of a concentric margin. 

Eccentric Thread Relief: Radial relief in the thread form starting at 

the cutting edge and continuing to the heel. 

Root: The bottom surface joining the flanks of two adjacent threads. 

Side of flank of thread: The surface of the thread which connects the crest to 

the root. 

Shank: The portion of the tap by which it is held and driven. 

Spiral point: An oblique cutting edge ground into the lands to provide a shear 

cutting action on the first few threads. 

Square: The squared end of the tap shank. 

Thread: The helical formed tooth of the tap which produces the thread in a 

tapped hole. 

Thread lead angle: The angle made by the helix of the thread at the pitch 

diameter; with a plane perpendicular to the axis. 

Threads per inch: The number of threads in one inch of length. 

Thread: SINGLE: A thread which is equal to pitch. DOUBLE: A thread in which 

lead is equal to twice the pitch. TRIPLE: A thread in which lead is equal to triple 

the pitch. 



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Tapmatic Corporation - Coarse Threads vs. Fine Threads 


800x600 



Coarse Threads 

For most applications, course threads offer these advantages: 

● Easier and faster assembly, providing a better start with less 

chance of cross threading. 

● Nicks and burrs from handling are less liable to affect assembly. 

● They are less likely to seize in temperature applications and in 

joints where corrosion will form. 

● Less prone to strip when threaded into lower strength metals. 

● More easily tapped in brittle materials and or materials that 

crumble easily. 

Fine Threads 

Fine threads may make for a superior fastener for applications with 

specific strength or other requirements. 

● They are about 10% stronger that coarse threads due to their 

greater cross-section area. 

● In very hard materials, fine threads are easier to tap. 

● They can be adjusted more precisely because of their smaller 

helix angle. 

● Where length of engagement is limited, they provide greater 

strength. 

● Thinner wall thickness can be used because of their smaller 

thread cross section. 






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Tapmatic Corporation - Coarse Threads vs. Fine Threads 

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Tapmatic Corporation - Machine Recommendations For Cold Forming Taps 


800x600 



Cold Forming Internal Threads With Taps: Internal threads can be produced 

by a cold forming or swaging process. The desired thread is formed in the metal 

under pressure and the grain fibers, as in good forging, follow the contour of the 

thread. These grain fibers are not cut away as in conventional tapping. The cold 

forming tap has neither flutes nor cutting edges and therefore, it produces no 

chips and cannot create a chip problem. The resulting thread has a burnished 

surface. 

Material Recommended: Care must be taken to minimize surface damage to 

the hole when tapping materials which are prone to work harden. This may be 

accomplished by using sharp drills, correct speed and feeds. Surface damage may 

cause torque to increase to a point of stopping the machine or breaking the tap. 

Cold forming taps have been recommended for threading ductile materials. 

Examples of material classes which have been tapped are: 

● Low carbon steels 

● Leaded steels 

● Austenitic stainless steels 

● Aluminum die casting alloys (low silicon) 

● Wrought aluminum alloys (ductile) 

● Zinc die casting alloys 

● Copper and copper alloys (ductile brasses) 

Cold Forming Tap Application Information 

Tapping Application The Same: Except for changes in hole size, the application 

of cold forming taps differs in no way from conventional cutting taps. 

Blind Hole Tapping Possible: Whenever possible, in blind holes, drill or core 

deep enough to permit the use of the plug style taps. These tools, with four 

threads of taper, will require less torque, will produce less burr upon entering the 

hole, and will give greater life. 

Torque: Where the operation calls for 75% of thread or less, the torque required 

varies with the material from no additional torque to 50% additional torque. On 

most applications, therefore, conventional equipment is suitable for driving cold 

forming taps. 

No Lead Screw Necessary: These taps work equally well when used in a 

http://www.tapmatic.com/tech_manual/machine_recommendations.html (1 of 3) [1/4/2004 12:05:46 PM]


standard tapping head, automatic screw machine, or lead screw tapper. It is 

unnecessary to have lead screw tapping equipment in order to run the cold 

forming tap because the tool will pick up its own lead upon entering the hole. 

Standard Lubrication: In general it is best to use a good cutting oil or lubricant 

rather than a coolant for cold forming taps. We recommend MQL Systems Dry-Cut 

Cutting Fluid. 

Spindle Speeds: For most materials, spindle speeds may be increased over 

those recommended for conventional cutting type taps. Generally, the tap 

extrudes with greater efficiency at higher RPMs but it is also possible to run the 

tap at lower speeds with satisfactory results. 

Counter Sinking or Chamfering Helpful: Because these taps displace metal, 

some metal will be displaced above the mouth of the hole during tapping. For this 

reason it is best to countersink or chamfer the hole prior to tapping, so that the 

extrusion will raise within the countersink and not interfere with the mating part. 

Tapping Cored Holes Possible: Cored holes may be tapped with these taps 

provided the core pins are first changed to form the proper hole size. Because 

core pins have a draft or are slightly tapered the theoretical hole size should be at 

a point on the pin that is one-half the required length of engagement of the 

thread to be formed. In designing core pins for use with these taps, a chamfer 

should be included on the pin to accept the vertical extrusion. 

Drill Selector Chart: The chart shown previously is based upon a formula 

derived from research statistical data and is designed to reflect the flow 

characteristics of all ductile materials. Laboratory experiment proved that there 

are only slight differences in the flow characteristics of the different metals as 

related to internal threading. It will be necessary to deviate slightly from the 

recommended hole size when tapping extremely ductile or extra hard metals. 

The formula for these theoretical hole size determinations is as follows: 

Theoretical Hole Size 

Example: To determine the proper drill size to form 65% of thread with a 1/4-20 

cold form tap. 










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Tapmatic Corporation - Tapping Torque & Horsepower 


800x600 



Note: Numbers are in inch-pounds. All values given are for 1010 mild 

steel. For other materials multiply the values by the factors given in 

the torque and horsepower calculation table. 

Reference Charts: 

- Tapping Torque & Horsepower Requirements Torque Setting Data For HSS 

Straight Flute Plug Taps 

- Torque Setting Data For Pipe Taps 

- Torque And Horsepower Calculation Factors 








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Tapmatic Corporation - Tapping Torque & Horsepower 

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Tapmatic Corporation - Tapping Torque vs. Thread Strength 


800x600 



Suggested Percentage Of Full Threads In Tapped Holes 

It stands to reason that it takes more power to tap to a full depth of thread than 

it does to tap to a partial depth of thread. The higher the metal removal rate, the 

more torque required to produce the cut. 

It would also stand to reason that the greater the depth of thread, the stronger 

the tapped hole. This is true, but only to a point. Beyond that point (usually about 

75% of full thread) the strength of the hole does not increase, yet the torque 

required to tap the hole rises exponentially. Also, it becomes more difficult to hold 

size, and the likelihood of tap breakage increases. With this in mind, it does not 

make good tapping sense to generate threads deeper than the required strength 

of the thread dictates. 

As a general rule, the tougher the material, the less the percentage of thread is 

needed to create a hole strong enough to do the job for which it was intended. In 

some harder materials such as stainless steel, Monel, and some heat-treated 

alloys, it is possible to tap to as little as 50% of full thread without sacrificing the 

usefulness of the tapped hole. 

workpiece 

material 

hard or tough 

cast steel 

drop forgings 

Monel metal 

nickel steel 

stainless steel 

free-cutting 

aluminum 

brass 

bronze 

cast iron 

copper 

mild steel 

tools steel 

deep 

hole 

tapping 

http://www.tapmatic.com/tech_manual/tapping_torque_vs.html (1 of 3) [1/4/2004 12:05:47 PM] 

average 

commercial 

work 

thin 

sheet stock 

or stampings 

55% - 65% 60% - 70% - 

60% - 70% 65% - 75% 75% - 85%


% Of Thread Calculation for Cutting Taps 








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Tapmatic Corporation - Standard Tap Dimensions 


800x600 



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800x600 



Metric Taps 

To Din STD (371) 

Metric Iso Threads 








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800x600 



Metric Taps 












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800x600 



Metric Taps 












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Tapmatic Corporation - Standard Pipe Tap Dimensions 


800x600 



Taper Pipe Taps 

Straight Pipe Taps 

Din Shank Pipe Taps NPT 

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Tapmatic Corporation - Standard Pipe Tap Dimensions 








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Tapmatic Corporation - Class of Threads 


800x600 



Classes Of Threads 

There are (3) established Classes of Thread, designated in the unified 

series by adding: "A" for Screws and "B" for Nuts (or other intenal 

threads) to show definite limits and tolerances. 

Class 1B Thread 

Is wherea 1A screw can run in readily for quick and easy assembly. The 

hole is classified as 1B. The fit is a 1B thread, (very seldom used in 

modern metal working) 


Consists of a 2A screw in a 2B hole. 2B thread has wide applications. It is 

used to accomodate plating, finishing and coating to a limited extent and 

threfore, has fair tolerance allowances. 


3A screw in a 3B nut or internal threaded hole, used where tolerance 

limits are close. 

GH Numbers 

GH Numbers are listed below. "G" designates Ground Thread. "H" 

designates the pitch diameter is on high side of basic. These two letters 

(GH) are followed by a numeral indicating the Tolerance of Pitch diameter 

oversize. 

H1 = Basic to Plus .0005 

H2 = Basic Plus .0005 to Plus .0010 




H6 = Basic Plus .0025 to Plus .0030 H=Above Basic 

H7 = Basic Plus .0030 to Plus .0035 L=Below Basic 

http://www.tapmatic.com/tech_manual/class_of_threads.html (1 of 3) [1/4/2004 12:05:56 PM]


Relation Of Tap Pitch Diameter to Basic Pitch Diameter 

American Tap Manufacturers use a series of tap pitch diameter limits. 

These limits feature a .0005 tolerance in tap sizes #0 Thru 1" and a .001" 

or greater tolerance in tap sizes above 1" thru 1 1/2" diameter. 

Example: 1/2-20. Relationship between Tap Pitch diameter limits and 

basic nominal pitch diameter. 

Basic 

Pitch Diameter: 

Notes: 

GL1 ----.2200 

GL1 ----.2190 

GL1 ----.2185 

GH2 ----.2180 

GH1 ----.2175 

GL1 ----.2170 

1. A tap cannot produce a class of thread it can produce a tapped 

hole within specific product limits. 

2. Since the tap is used only in tapping a hole or producing an 

internal thread, a tap has no control over the fitting properties of 

the mating external thread. 

3. To produce what is commonly referred to as a class of thread both 

external and internal threads must be within their respective 

product limits. Only when both members of a thread assembly fall 

within their desired class limits can the proper fit be assured. 

4. The acceptability of any class of threaded hole is determined only 

by an accurate "G0" or "HI" Thread plug gage of corresponding 

class. The acceptability of the male part with an external Thread is 

also determined by a corresponding "GO" or "LO" Thread Ring 

gage. 

5. Tap limits refer to the various sizes of tap manufactured. A tap 

whould be selected which will produce an internal Thread within 

the desired product limit. Tap limits are designated as L1, H1, H2, 

H3 etc. 

6. Although ground taps are produced to precision tolerances under 

closely controlled manufacturing processes and are guaranteed for 

accuracy of individual elements, there is always the possibility of 

the presence of unknown factors which can be a detriment to good 

tap perfomance. 








208.773.8048 / 800.854.6019 / Fax: 208.773.3021 







Tapmatic Corporation - Surface Treatments for Taps 


800x600 



Nitride 

A hard superficial case, approximately 68 HRC, on the surface of a finished tap 

produced by means of a cyanide salt bath. 

Purpose to resist abrasion and increase wear resistance due to the 

higher surface hardness. 

Application Effective in both abrasive and tough materials, cast 

iron, plastic, stainless steel and high tensile strength steels. 

Note! Care must be used when selecting nitride surface treatment because the 

increase hardness has a tendency to make the tap easy to chip and damage: 

Nitride not recommended for fast spiral flute taps and taps smaller than 

machine screw #2. 

Double Nitride 

Very similar to Nitride surface treatment with the exception that the hard case 

produced is deeper and harder than standard Nitride. 

Application Extremely abrasive materials, plastic and gray cast 

iron. 

Oxided 

Produced on surface of a finished tap by means of a steam furnace or cyanide 

salt bath. Well know heat treatment by which an oxide layer (Fe3O4) is formed 

on the surface of the tap. This will improve the adherence of threading agent 

which leads to improved output of taps. 

Categories of Oxide 

Steam Oxide: To counteract galling or loading lubricate tap 

surfaces. Best for low carbon, leaded steel, stainless and gummy 

material. 

Nitride and Oxide: For stress relief and light coating. Copper 

alloys of medium machinability. 

Nitride Plus Steam Oxide: To add wear life and reduce loading. 

High speed production tapping, poor lubrication. Steam Oxide Plus 

Nitride: To add wear life and provide self lubrication. Use in cast 

iron. 

http://www.tapmatic.com/tech_manual/surface_treatments.html (1 of 3) [1/4/2004 12:05:57 PM]


Heavy Nitride Plus Steam Oxide: To add wear life in hard and 

dense metals. For tapping hard steel alloys, titanium, exotic metals 

and hard copper alloys. 

Black Oxide: Helps retain cutting fluid in the working portion of 

the tap. Improves Performance in stainless steel, steel forgings, 

tool and die steel, and hot and cold rolled steels. 

Hard Chrome 

A surface treatment in the form of a thin hard chromium layer deposit (.0001 

approximately). Increases the taps surface hardness and help reduce torque 

required to drive the tap. 

Purpose: Proven very advantages in non-ferrous materials, such 

as copper, brass and bronze. 

PVD Process (TiN, and TiCN) 

Used to resist abrasion and chip welding. Biggest potential is for ferrous 

materials below 40RC. 

TiN Titanium Nitriding 

In the PVD treatment a 2-4 micron layer is formed. The coating is a gold color 

with a hardness of about 2300 HV with good friction characteristics and coating 

adhesion for improved tool life. TiN coating remains resistant up to 600 degrees 

centigrade. 

TiCN Titanium Carbonitriding 

A similar PVD process as TiN coating. Friction characteristics are still better than 

TiN. The TiCN coating remains resistant up to 400 degrees centigrade. The 

coating is a grey-purple color. 

Insulation 

A method of surface treatment which has a marked influence on diminishing the 

possibility of "cold welding" especially good for machining softer steels. 

Jetting 

A surface treatment through which the sliding property of the tap is increased, 

especially for machining different nonferrous metals. 








208.773.8048 / 800.854.6019 / Fax: 208.773.3021 







Tapmatic Corporation - Tapping Collets 


800x600 



The GB style collets can also be supplied for ISO, DIN, and Japanese 

standard manufactured taps, when ordering one of these collets, 

please specify the standard and the tap shank diameter in 

millimeters. 

http://www.tapmatic.com/tech_manual/tapping_collets.html (1 of 2) [1/4/2004 12:05:59 PM]

Tapmatic Corporation - Tapping Collets 








208.773.8048 / 800.854.6019 / Fax: 208.773.3021 




http://www.tapmatic.com/tech_manual/tapping_collets.html (2 of 2) [1/4/2004 12:05:59 PM]

Tapmatic Corporation - Tapping Formulas 


800x600 



RPM = (SFM x 3.82) divided by D D = Diameter of Tap in inches 

SFM = (3.14 x D x RPM) divided by 12 D = Diameter of Tap in inches 

Inch Taps 

.01299 x % of Full Thread 

Drill Size = Major Diameter of Tap minus 

# Of Threads / inch 

Inch Taps 

Major Dia. of Tap minus Drill Diameter 

% of Full Thread = Threads/in x 

.01299 

Metric Taps 

% of Thread x Metric Pitch 

Drill Size = Major Diameter of Tap (mm) minus 

76.98 

Metric Taps 

% of Full Thread = 76.980 

x (Basic Major Diameter (mm) minus Drilled Hole (mm)) 

Metric Pitch 

Form Tap Drill Size = Basic Tap OD minus 

.0068 x % of Threads 

Threads / Inch 

Inch Taps 

IPM (For Threads) = RPM divided by TPI (Threads per Inch) 

Inch Taps 

IPR (For Threads) = 1 divided by TPI 

Inch Taps 

IPM (Inches Per Minute) = IPR x RPM 

Inch Taps 

IPR (Inches Per Rev.) = IPM divided by RPM 

Metric Taps 

MM/Min = RPM x Metric Pitch 

Inch Taps 

In/Min = RPM divided by # of Threads / in. 

Distance = Rate x Time 

http://www.tapmatic.com/tech_manual/tapping_formulas.html (1 of 2) [1/4/2004 12:06:00 PM]

Tapmatic Corporation - Tapping Formulas 

Distance 

Time = 

Rate 








208.773.8048 / 800.854.6019 / Fax: 208.773.3021 




http://www.tapmatic.com/tech_manual/tapping_formulas.html (2 of 2) [1/4/2004 12:06:00 PM]



800x600 



New SynchroFlex Rigid Tap Driver 

Increases Tap Life By 100% Or More. 

How Much Can You Save If You Cut Your Tap 

Costs In Half? 

Mr. Sean Ziese, Vice President, 

Ziese Products Inc. 

Cookson Oklahoma USA 

Application: 

Work Place 

Rigid Tapping 

Material: CF8M 

Tap Sizes: 10-32 

http://www.tapmatic.com/tappingnewsupdate.html (1 of 6) [1/4/2004 12:06:02 PM]


Tap Styles: Spiral 3 Fluted, Modified Bottoming, GH-3 




Coolant: Master Chemical E206 

Tap Driver: Tap Collet (Rigid Tapping) 

Machine: Mazak VTC 16-B 

Problem: Short tap life 


Results: -Tap Life Increased from 72 holes per tap to 216 

holes per tap. 

-Tap Costs Reduced from $77.00 to $25.00 per day 

and 

-Production Increased from not changing taps so 

often. 

Mr. Karl Stickel 

Criterion Machine Works 

Costa Mesa, California USA 


Work Place 

http://www.tapmatic.com/tappingnewsupdate.html (2 of 6) [1/4/2004 12:06:02 PM] 

SFT50 Paid For Itself In 7 Days In Tap Cost Savings, 

Alone.


Material: 8620 

Tap Sizes: 5/16-24 

Tap Styles: Plug 


Hole Depth: 9mm Min (M6 tap) 28mm Max (M8 tap) 


Coolant: Trim Sol 

Tap Driver: Rigid Collet 

Machine: Fadal VMC 3016 

Rough torn finish on threads in DBL-202 bar 

Problem: 

holder. Threads would come out under or over 

size and required for re-work. 

Solution: Installed Tapmatic SFT50 Tap Driver. 

Driver 

Results: Threads consistentaly gage correctly eliminating 

consuming re-work. Tap life increased 100 to 150% 

with much better quality threads. 

Do The Math For Your Own Applications And See How 

Quickly SFT Pays For Itself 

STF Example I: 

Tap Cost: $20.00 · Tap Life Increased from 100 Holes to 200 

Holes · Savings Per Hole: 10 cents • SFT50 Paid for in 3,650 holes. 

STF Example II: 

Tap Cost: $20.00 · Tap Life Increased from 1000 Holes to 2000 

Holes · Savings Per Hole: 1 cent • SFT50 Paid for in 36,500 Holes. 

Switch To Constant-Speed Tapping 

And Also Cut Cycle Time In Half 

Tapmatic RDT / IDT attachments Incorporate similar technology to the SFT 

units and offer similar increases in tap life plus the benefit of Constant 

Speed throughout the tapping cycle. By eliminating machine reversal, they 

avoid the RPM fluctuations common to Synchronous Feed Tapping and 

provide absolute maximum tap life. They also double tapping production in 

most applications 



Mr. Ken Hale, General Manager 

P.M. Machine Company 

Berryville, Arkansas, USA 

Application: Originally Rigid Tapping 

Work Place 

Material: 380 Cast Aluminum 

Tap Sizes: #6-32 

Tap Styles: Spiral Bottoming 


Hole Depth: .205" Thru 


Coolant: Semi-Synthetic Emulsion 

Tap Driver: Conventional Collet Chuck (Rigid Tap Driver) 

Machine: Daewoo DMV-500 

Problem: "Starting and stopping of the rigid tap cycle 

was costing us too much time. The machine 

only reached a tapping speed of 1200 RPM 

before reversing. Machine time in part cycle 

time was much more of a percentage than 

desired." 

Solution: P.M. Machine switched to a Tapmatic RDT25 

Constant Speed, Self-Reversing Tapping 

Attachment. This eliminated the wasted time in 

the cycle allowing the parts to run much 

quicker. 

Results: 53% Cycle Time Savings. Cycle time for four parts 

dropped from 91 seconds to 43 seconds. So tapping 

time went from 79 seconds to 31 seconds for 16 

total holes from four parts. 

Total Savings 2 Seconds Per Hole 


Now Check Your Total Savings With The 

Added Advantages of Constant Speed Tapping


CST Example: 

Machine Hourly Rate: $100.00 

Typical Time Savings Per Tapped Hole: 1 second 

Cycle Time Savings Per Hole: 2.8 cents 

Plus Tap Life Savings Per Hole from SFT Example II: 1 cent 

Total RDT/IDT Savings Per Tapped Hole: 3.8 cents 

RDT 50 (price $1,417.00) Paid for itself in: 37,289 holes 

Please Note: 

RDT stands for Renewable Drive Tapping. Routine, preventative 

maintenance will assure continuous like-new performance. If done at 

100,000 holes, for example, the cost should not exceed 1/10th of a cent 

per hole and take no more than 20 minutes. 


If You Have An Application That Would Make 

A Good Case History, Please Let Us Know About It. 








208.773.8048 / 800.854.6019 / Fax: 208.773.3021 








800x600 



http://www.tapmatic.com/programming/index.html (1 of 2) [1/4/2004 12:06:03 PM] 

● Program Depth And Machine Feed For Self-Reversing 

Tapping Attachments 

● CNC Programming For SPD, NSM, NC, ASR & RSR 

● Programming For RDT 15, 25, 50, 75 and NCRT 25 & 50 








208.773.8048 / 800.854.6019 / Fax: 208.773.3021 





http://www.tapmatic.com/programming/index.html (2 of 2) [1/4/2004 12:06:03 PM]



800x600 



● RDT Series Self-Reversing Tapping Units 

● NCRT25 & 50 Series Self-Reversing Units 

http://www.tapmatic.com/installation/index.html (1 of 2) [1/4/2004 12:06:04 PM] 








208.773.8048 / 800.854.6019 / Fax: 208.773.3021 





http://www.tapmatic.com/installation/index.html (2 of 2) [1/4/2004 12:06:04 PM]

Tapmatic Corporation - 2000 Technical Manual - FPGA-FAQ

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