What is TDX Drill

TDX-type TAC Drill Manual 

TAC DRILL Manual 

DW chipbreaker 

DS chipbreaker 

DJ chipbreaker

CONTENTS 

What is TDX Drill ? ··········································· 1 

• Nomenclature for TAC Drill ········································· 1 

• Cutting mechanism of TAC Drill ································· 1 

Features of TDX Drill ········································· 2 

Components of TDX Drill series ···························· 3 

• Body ··········································································· 3 

• Inserts ········································································· 3 

• Optional components ················································· 3 

Features of drill body ········································ 4 

Features of chipbreakers ··································· 5 

• DJ chipbreaker ··························································· 5 

• DS chipbreaker ··························································· 5 

• DW chipbreaker ·························································· 5 

Application area of each chipbreaker type ·············· 6 

Features and applications of insert grades ·············· 6 

Insert selection guide ······································· 7 

Recommended cutting conditions ························· 7 

• Points to consider ······················································ 7 

Chip shapes···················································· 8 

• Chip shapes produced by central edge ····················· 8 

• Chip shapes produced by peripheral edge ················ 9 

Medium to high carbon steels, alloy steels, etc. 

Stainless steels, low carbon steels, low alloy steels, etc. 

• Chip control for snarled chips ·································· 10 

• Chip control for low carbon steels at low cutting speeds ·········· 11 

• Chip control for aluminum alloys ······························ 12 

Chip shapes (DW chipbreaker)····························· 13 

• Comparison of chip shapes at high feeds ················ 13 

• Chip shapes at normal conditions ···························· 13 

• Chip shapes of stainless steels, alloy steels, 

and low carbon steels ·············································· 13 

Cutting performance of long body types ················· 14 

Selection of L/D in drill specifications ··················· 15 

Machining data ·············································· 16 

• Tool life comparison in drilling alloy steel ················· 16 

• Tool life comparison in drilling stainless steel ·········· 16 

• Improvement in drilling of stainless steel ················· 16 

• Machining of hardened steel with small diameter (ø 13 mm) drill ····· 17 

• Machining example of hardened steel ····················· 17 

• Improvement in drilling of hard cast iron ·················· 17 

• Deep hole drilling of low carbon steel 

with large-diameter (ø 50 mm) drill ··························· 18 

• MQL deep-hole drilling of carbon steel with 

small diameter (ø 12.5 mm) drill ······························· 18 

• High-efficiency drilling with DW insert (GH730) ······· 19 

Finished hole diameters ···································· 20 

Determination of tool life ·································· 21 

• Tool life determination for insert ······························· 21 

• Tool life determination for drill body ························· 22

Cutting forces ················································ 22 

Surface finish ················································ 23 

Shapes of hole bottom ······································ 24 

Use of TDX drill on machining centers ··················· 24 

• Selecting toolholders ················································ 24 

• Adjusting drilling diameter ········································ 24 

Use of TDX drill on lathes ·································· 25 

• Mounting of drill body on turret (tool post) ··············· 25 

• Checking of cutting edge height ······························ 25 

• Checking of setting conditions by try machining ····· 26 

• Adjusting of cutting edge height ······························ 26 

Offset machining on lathes ································ 27 

• Offset machining ······················································ 27 

Cautions when using on lathes ···························· 28 

• Through-hole drilling ················································ 28 

• When a disc-like uncut piece is left on the exit side ········ 28 

• When machining a large-diameter hole 

in excess of the maximum drilling diameter ············· 28 

• When using TDX drill on lathe 

without internal coolant supply ································ 28 

Special machining ··········································· 29 

• Surface conditions to be machined ························· 29 

• Drilling of interrupted hole ········································ 29 

• Drilling of stacked plates ·········································· 30 

• Enlarging of drilled hole ············································ 30 

MQL machining ·············································· 31 

• What is “MQL” machining ? ····································· 31 

• Cautious points in selecting drilling conditions ········ 31 

Cautious points in use ······································ 32 

• Cutting fluids ···························································· 32 

• Maximum drilling depth ············································ 32 

• Machining of through hole ········································ 32 

• Drilling through-hole on work-rotating condition······ 32 

Troubleshooting ·········································· 33,34 

Specifications of TDX drills ································ 35 

• L/D=2 (metric) ··························································· 35 

• L/D=2 (inch) ······························································ 36 

• L/D=3 (metric) ··························································· 37 

• L/D=3 (inch) ······························································ 38 

• L/D=4 (metric) ··························································· 39 

• L/D=5 (metric) ··························································· 40 

Test report format ··········································· 41 

Specifications of inserts for TDX drills ·················· 42 

EZ-sleeves specially designed for TDX drills ··········· 42 

• Use EZ sleeves for the following purposes ·············· 42 

• Setting of EZ sleeve·················································· 43 

• Specifications ··························································· 43 

CONTENTS

What is TDX Drill ? 

• A drill which has dual indexable-inserts configured on the front end of a steel holder. 

• Both inserts share the cutting zone. 

• Insert grades and geometries can be selected to suit the machining situation. 

Nomenclature for TAC Drill 

Flange diameter 

Shank 

Peripheral insert 

Maximum drilling depth 

Overall length 

Shank length 

Drill diameter 

Shank diameter 

Central insert 

Flute 

Flange 

Taper pipe thread ( PT screw ) 

Cutting mechanism of TAC Drill 




Cutting zone of central edge 

Cutting zone of 

peripheral edge 


Drill diameter øD 

1

Features of TDX Drill 

Outstanding economy 

Four cutting edges per insert can be 

economically utilized by indexing it as 

shown below. 

Exceptional chip control 

The newly designed 3-dimensional 

chipbreakers provide exceptional chip control 

over a wide range of work materials. 

Specially designed chip pocket helps to 

effectively remove chips from the cutting zone. 


Insert 

changing 

Indexing 


Stable drilling and low vibration 

Can enter the cut smoothly with less 

vibration and allows stable machining. 

Exceptional reliability 

The thicker insert design increases impact 

resistance and extends tool life. 

Good surface quality 

The stable cutting balance allows excellent 

chip evacuation and good surface finish. 

2

Components of TDX Drill series 

Body 

Only Tungaloy offers a full lineup of drill diameters (ø12.5 to ø54.0) 

and L/D ratios (2, 3, 4 and 5) ! 

Unavailable 

 

 

 

Competitive indexable insert drills 

 


Inserts 

Three types of chipbreaker geometries and four insert grades are 

available. Inserts are selectable from the eight combinations of grades 

and chipbreaker types. 

Chipbreaker types 

Grades 

AH740 

AH120 

DJ 

 

DS 

 

DW 

 

 

 

 

GH730 

T1015 

 

 

 

 

 

Optional components 

Eccentric sleeves specifically designed for the TDX drills extend 

the application range. 

 

 

3

Features of drill body 

New drills specially designed for deep holes have realized stable 

drilling of deep holes up to 5 times the drill diameters !! 

Ideally balanced design 

Higher reliability 

Existing 4-corner inserts can be economically 

used for these new drills. 

The design of the insert configuration allows 

stable deep hole drilling up to 5 

times the drill diameter. 

Excellent chip control 

New oil-hole design and increased crosssectional 

area of the flute have vastly improved 

chip evacuation ability. 

Highly rigid tool design 

By optimizing the flute design, the deflection 

of the drill body could be suppressed 

to a minimum. 

Example of stable drilling with small diameter drill 

Spindle power consumption (A) 

15 

10 

5 

0 

Entrance 

Amount of oversize 

Spindle power 

consumption 

1.0 

0.8 

0.6 

0.4 

0.2 

0 

Bottom 

TDX 

 

 

Amount of oversize (mm) 

Competitor “A” (ø13) 

15 

10 

5 

0 

Entrance 

Amount of oversize 

Spindle power 

consumption 

1.0 

0.8 

0.6 

0.4 

0.2 

0 

Amount of oversize (mm) 

Bottom 

Competitor “A” (ø13) 

Machine : Vertical machining 

center (BT50) 

Work material : High carbon steel 

(JIS S55C) 

Drilling depth : 52 mm 

(L/D=4, Blind hole) 

Cutting speed : Vc=150 m/min 

Feed : f =0.1 mm/rev 

4

Features of chipbreakers 

Three types of chipbreakers are available for various applications 

 

 

General purpose chipbreaker usable for almost all applications. 

Features low cutting forces and allows 

stable drilling. 

Low cutting forces 

and long tool life 

Bumps and grooves formed on 

the rake face reduce the contact 

area with chips resulting in 

reduction of cutting forces and 

longer tool life. 

Chipbreaker for 

peripheral edge 

Deeply formed chip groove performs 

exceptionally free cutting action 

and effective chipbreaking. 

Chipbreaker for 

central edge 

Relatively shallow chip groove prevents 

chips from packing. 

 

 

Performs excellent chip control for gummy materials 

such as stainless steels and low carbon steels. 

Entirely new rake 

face design 

Can effectively form gummy material 

chips into short sections. 

Sharp cutting edges 

Exceptionally free cutting action 

improves chip control. 

Strengthened corner 

Strengthened corner geometry minimizes 

insert breakage even in drilling 

stainless steels 

 

 

Strong chipbreaker for 

high feeds 

Can forcibly curl thick 

chips produced in high 

feeds and causes them to 

break into short sections. 

Also it allows for large volume 

chip removal. 

In comparison with conventional inserts, this chipbreaker 

allows higher feeds and produces superior surface finish. 

Wiper design 

Can improve surface roughness 

at normal feeds and minimizes 

surface degradation at high 

feeds. 

Extraordinarily 

strengthened corner 

Increased land width plus a two 

step relief angle strengthens the 

corner section . 

5

Application area of each chipbreaker type 

DJ 

 

DW 

 

DS 

0.05 0.1 0.15 0.2 

f 

Stainless steels 

 

Steels 

Cast irons 

Features and applications of insert grades 

AH740 

GH730 

 

By combining ultra fine grain cemented carbide with “Flash-coat”, 

this grade provides both wear resistance and impact resistance. 

Can be used for a wide range of applications. 

 

By combining ultra fine grain cemented carbide with “Premium-coat”, 

the impact resistance is improved without sacrificing wear resistance. 

Combined with DW-chipbreaker, this grade can be used for high-feed 

machining of steels. 

T1015 

AH120 

 

By combining specially designed hard carbide substrate with 

newly developed multilayer compound coatings, this grade 

provides excellent wear resistance in machining cast irons. 

 

By combining highly reliable carbide substrate with “Flash-coat”, 

this grade provides superior impact resistance and wear resistance 

in high-speed machining. Best suitable for drilling stainless steels. 

T1015 

T1015 

AH740 

GH730 

AH740 

GH730 

AH120 

0.05 0.1 0.15 0.2 

f 

AH120 

100 150 200 250 300 

Vc 

Stainless steels Steels Cast irons 

6

Insert selection guide 

Select the appropriate insert by following this guide. 

Work materials 

Low carbon steels (C < 0.3) 

JIS SS400, SM490, S25C, etc. 

Carbon steels (C > 0.3) 

JIS S45C, S55C, etc. 

Low alloy steels 

JIS SCM415, etc. 

Alloy steels 

JIS SCM440, SCr420, etc. 

Stainless steels (Austenitic) 

JIS SUS304, SUS316. etc. 

Stainless steels(Martensitic and ferritic) 

JIS SUS430, SUS416, etc. 

Stainless steels(Precipitation hardening) 

JIS SUS 630, etc. 

Gray cast irons 

JIS FC250, etc. 

Ductile cast irons 

JIS FCD700, etc. 

Aluminum alloys 

JIS A2017. ADC12, etc. 

First 

choice 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High-feed High-speed 

machining machining Breakage 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Troubleshooting 

Wear 

 

 

 

 

 

 

 

 

 

 

 

 

Surface 

finish 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For high-feed machining, apply a feed 

rate that is approximately 1.5 times the 

standard feed conditions. 

High-speed machining means cutting 

speeds over 150 m/min. 

When using DW insert for troubleshooting, 

use it within the range of standard 

cutting conditions. 

Recommended cutting conditions 

Points to consider 

• Selecting the cutting conditions is an important point for proper machining. 

Therefore, when selecting cutting conditions, place the priority on chip control. 

• The cutting condition range which allows proper chip control depends on the 

types of chipbreaker and the material to be machined. 

• The chart at right shows the basic flow to select cutting conditions. 

Work materials 

Low carbon steels 

(C < 0.3) 

JIS SS400, SM490, S25C, etc. 

Carbon steels (C > 0.3) 

JIS S45C, S55C, etc. 

Low alloy steels 

JIS SCM415, etc. 

Alloy steels 

JIS SCM440, SCr420, etc. 


(Austenitic) 

JIS SUS304, SUS316. etc. 


(Martensitic and ferritic) 

JIS SUS430, SUS416, etc. 


(Precipitation hardening) 

JIS SUS 630, etc. 

Gray cast irons 

JIS FC250, etc. 

Ductile cast irons 

JIS FCD700, etc. 


JIS A2017. ADC12, etc. 

Cutting 

speed 

Series 

Vc (m/min) 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Feed f (mm/rev) 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Initially use this guide to select and 

adjust cutting conditions to 

achieve appropriate chip control. 

Check the cutting condition range 

which is appropriate to the spindle 

power and rigidity of the machine 

to be used. 

Check the cutting condition range 

in which abnormal tool failure such 

as chipping and breakage does 

not occur. 

Select the cutting conditions 

appropriate to the 

scheduled tool life and 

machining time. 

When the hardness of the work 

material is higher than 40 HRC, 

the feed should be reduced to 

within 1/2 of the values shown in 

the table. 

When machining difficult-to-cut 

materials such as heat-resisting 

alloys which develop heat excessively 

during machining, reduce 

the cutting speed to within 1/2 of 

the values for carbon steels. 

7

Chip shapes 

In TAC drills, because the central insert and the peripheral insert cut entirely different zones, two types 

of chips are produced. The following are the features of each shape. 

Chip shape produced with central insert 

• A conical coil shape whose apex point coincides with the rotating center 

of the drill is the basic shape. The chips are broken into small sections 

with increases in feed. But, excessively high feed causes the chip 

to increase in thickness and develops vibration which disturbs stable 

machining. 

• In TDX drills, marked chips shown below are the most preferable 

shapes. This type of chip is broken into adequate length by centrifugal 

forces when used in tool-rotating condition. On the other hand, when 

used in work-rotating condition such as on a lathe, a continuously long 

chip is often produced without entangling. 

Relation between chip shapes and feeds (In the case of central insert) 

Carbon steels, alloy steels, etc. 

Low carbon steels, stainless steels, etc. 

 

 

 

 

 

 

 

Example of chip shape in work-rotating applications (In the case of central insert) 

(ø26, S45C, Vc= 100m/min, f= 0.1mm/rev) 

100mm 

8

TDX drill 

Competitive 

drill A 

Comparison of chip shapes produced 

with central inserts 

(ø22 drills, vertical machining center) 

Alloy steel 

(JIS SCM440) 

Stainless steel 

(JIS SUS304) 

Mild steel 

(JIS SS400) 

Vcf Vcf Vcf 

DJ chipbreaker 


 

 


Comparison of surface finish influ 

enced by variations of chip shapes 

(ø22, SUS316L, NC lathe,Vc=100m/min, f=0.08mm/rev) 

Surface finish is affected by chip shapes 

produced with the central insert. 

Competitive 

drill B 

 

 

 

TDX DS 

Competitor “C” 

Competitive 

drill C 

 

 

 

 

 

Chip shape produced with peripheral insert 

• Chip problems such as entangling are mainly caused by chips produced 

with the peripheral insert. These problems are dependent on 

the types of work material and the cutting conditions. 

• As shown below, when the feed is extremely low, the chips jump 

over the chipbreaker groove and the continuously long chips may 

wrap around the drill body. 

• When the feed is too high, the chips increase the thickness and can 

not be curled. 

• Therefore, it is important to select proper cutting conditions to suit 

the machining so that well controlled chips will be formed. 

Relation between feeds and chip control 

Chips likely to wrap around drill body. 

Likely to cause chip packing 

 

Feed is too low. 

Adequate feed Feed is too high. 

• Just after start of cutting, a continuously long, 

coil-shaped chip is formed, but when the drilling 

depth reaches to 0.5 D to 1 D, the chip tends to 

shorten the length. 

• The chip shape in the early stage of cut , as both 

the cutting speed and feed are increased, tends 

to shorten the length. 

Chip shape in early stage of cut 

Start of cut 

9

Chip shapes formed with the peripheral insert are roughly classified, depending on the types of work 

materials, into two different types, general steels (JIS S45C, SCM440, etc.) and long-chip steels (JIS 

SS400, SUS316, S10C, SCM415, etc.). These features are described below. 

Medium to high carbon steels, alloy steels, etc. 

As shown below, several turns of coil are an ideal shape. 

As the feed increases, the curl radius and the number of turns tend to decrease. 

Typical chip shapes of general steels Variation of chip shapes relating to feeds 

f = 0.07mm/rev 

Stainless steels, low-carbon steels, low-alloy steels, etc. 

f = 0.1mm/rev 

f = 0.13mm/rev 

• When machining long-chip materials such as stainless steels and mild steels, a wrong selection of cutting 

conditions results in chip entangling and tool breakage at worst. Therefore, cutting conditions should be carefully 

selected. 

• “C” shaped, continuous coils of several to ten turns having adequately divided length are ideal shape. 

Ideal chip shapes 

DS 

chipbreaker 

DJ 

chipbreaker 

Stainless steel (JIS SUS 304) 

Vcf 

Mild steel (JIS SS400) 

Vcf 

For machining stainless steels or low carbon steels, 

DS chipbreaker is recommended. 

When using a TDX drill in tool-rotating condition, DS 

chipbreaker produces compact chips and allows more 

stable machining than DJ chipbreaker. Especially 

when using it in work-rotating condition, DS 

chipbreaker provides outstanding affect on chip control. 

Chips shapes which tend to entangle and remedies against them 

Apple-peel-like chips 

These chips are often produced in 

machining mild steels or low-carbon 

steels at low-speeds and low-feeds. 

 

Increase the cutting speed in stages 

by 20% within the range of standard 

cutting conditions. If there is no effect, 

increase the feed by about 10 % 

as the cutting speed is raised by 20%. 

Short-lead chips 

These chips are often produced in 

machining stainless steels at lowfeeds 

and tend to entangle to the tool 

in spite of short length. 

 

Increase the feed by about 10 %. If 

there is no effect, increase the cutting 

speed in stages by 10% within the 

range of standard cutting conditions. 

Very long chips 

Often produced in machining mild 

steels or low-carbon steels under 

improper cutting conditions. 

 

Increase the cutting speed in stages by 

20% within the range of standard cutting 

conditions. If there is no effect, decrease 

the feed by about 10 % as the 

cutting speed is raised by 20%. 

 

 

 

10

Chip control for low-carbon steels at low cutting speeds 

In the cases shown below, the demonstrated cutting speed is less than 60 m/min. 

As shown below, the use of DS chipbreaker allows effective chip control. 

• When the cutting speed can not be raised to the standard cutting conditions because of machine limitation. 

(Especially when using a small diameter drill) 

• Safety problems could result from violently scattering chips. 

Low carbon steel ( JIS S25C ) , NC lathe, ø13, Vc = 60m/min 

Feed 

DS chipbreaker DJ chipbreaker CompetitorA 

CompetitorB 

f 

r 

r 

Remarkable vibration 

f 

r 

r 

r 

f 

r 

r 

r 

Mild steel ( JIS SS400 ) , Machining center , ø13, Vc = 60m/min 

Feed 

DS chipbreaker DJ chipbreaker CompetitorA CompetitorB 

f 

r 

Remarkable vibration 

f 

r 

r 

r 

f 

r 

r 

r 

11

Comparison of chip shapes ( ø22 drill, vertical machining center ) 

Alloy steel (JIS SCM440) 

Vcf 

Stainless steel (JIS SUS304) 

Vcf 


Vcf 


Competitor "C" Competitor "B" Competitor "A" 


 

 

 

 

 

 

 

 

When machining a gummy material, as the cutting 

speed increases, chips are likely to be broken into 

shorter sections. But, in tool-rotating applications 

such as on a machining center, chips are likely to 

be violently scattered because of the increased 

centrifugal forces as the cutting speed increases. 

In such cases, a safety protection to cover the cutting 

zone is essential. 


Applicable 

Chip control for aluminum alloys listed 

below is relatively easy and can be carried 

out by using standard inserts. 

• Aluminum alloys for casting (JIS AC4B, etc.) 

• Aluminum alloys for die casting (JIS ADC12, etc.) 

• Al-Cu based aluminum alloys (JIS A2017, etc.) 

• Al-Zn-Mg based aluminum alloys (JIS A7075, etc.) 

• Heat-treated aluminum alloys ( -T6, etc.) 

Difficult to apply 

The following aluminum alloys are highly adhering and 

tend to be thick chips. Therefore, referring to the chart 

at right, select an appropriate chipbreaker and cutting 

conditions for the machining purpose. In addition, 

as the peripheral edge especially tends to produce 

long and uncontrolled chips, step-feed drilling should 

be carried out depending on the circumstance. 

• Al-Mg based aluminum alloy (JIS A5052) 

Without 

step feed 

With step feed 

every 0.5 mm 

Feed mm/rev 

 

 

 

 

Al-Cu based aluminum alloy 

(JIS A2017) 

d=25 mm (blind hole) 

Vertical machining center, 

wet cutting 

Toolholder : TDX180L054W25 (ø18) 

Insert : XPMT06X308R-DW (GH730) 

Vc=200 m/min 

f=0.1 mm/rev 

Selection guide for chipbreaker types and cutting conditions 

in machining Al-Mg based aluminum alloys 

 

Cutting speed 

 

 

Note: When chips heavily adhere to the chipgroove, continuous 

machining is difficult in some instances. 

Al-Mg based aluminum alloy (JIS A5052) 


Machine: Vertical machining center, wet cutting 

Toolholder : TDX190L057W25 (ø19) 

Insert : XPMT06X308R-DW (GH730) 

Vc=300 m/minf=0.15 mm/rev 

Not applicable 

For the following aluminum alloys, because of remarkable chip adhering and packing on the 

chip groove, TDX drills can not be used. 

• Pure aluminum alloys (JIS A1000, etc.) 

12

Chip shapes (DW chipbreaker) 

DW chipbreaker is designed to forcibly break thick chips. The use of DW chipbreaker allows highly 

efficient machining in higher feed rate. 

Comparison of chip shapes at high feeds 

• When using a conventional chipbreaker at high feeds, the central edge produces short chips. But, as the chip 

thickness increases, the occurrence of vibration makes the machining unstable. Additionally, the chips produced 

with the peripheral edge are too thick and can not be curled. 

• DW chipbreaker is designed to have a special section shape suitable for high feeds and to break thick chips 

into short length by forcibly curling them. 

Comparison of chip shapes (JIS S55C,ø22, Vc=100 m/min, f=0.2mm/rev, Vertical machining center) 

Chips produced with central edge 

Chips produced with peripheral edge 

DJ 

chipbreaker 

For high-feed machining, the guideline to select the 

feed is about 1.5 times the standard cutting conditions. 

High-feed machining will cause a heavy-load 

on the machine. Therefore, it should be carried out 

only when the machine has sufficient power and rigidity. 

Cutting fluid should be supplied in adequate volume 

through the tool. Fluid pressure of a minimum 

1.5 MPa and volume of a minimum 10 l/min are recommended. 

Chip shapes in normal conditions 

DW chipbreaker can control chips even in 

normal conditions. But, because the cutting 

forces are higher than those of DJ chipbreaker, 

the first choice chipbreaker in normal conditions 

is the DJ chipbreaker. DW chipbreaker should 

be used where increased insert strength and 

improved surface finish are required. 

DW 

chipbreaker 



DJ 

chipbreaker 

DW 

chipbreaker 

 

 

Competitive 

“A” 

 

Competitive 

“B” 

 

 

 

Chip shapes 

(Mild steel (JIS SCM400), ø22, Vc=150 m/min, 

f=0.1 mm/rev, Vertical machining center) 

Chip shapes in machining stainless steel, alloy steels, low carbon steels 

Although DW chipbreaker can be used for 

relatively gummy materials, DS chipbreaker has 

an advantage over DW in compactness of the 

chips produced with the peripheral insert and 

the stability in machining. 

DW chipbreaker is not recommended for highfeed 

machining of stainless steels. 

Chip shapes 

(Mild steel (JIS SS400), ø22, Vc=300 m/min, 

f=0.08 mm/rev, Vertical machining center) 

DW 

chipbreaker 

DJ 

chipbreaker 



13

Cutting performance of long body types 

Allows stable machining for almost all work materials ! 


Toolholder TDX130L052W20-4 (ø13) 

InsertXPMT040104R-DJ (AH740) 

Alloy steel 

(JIS SCM440) 

230HB 

Spindle power (A) 

 

 

 

 

 

 

 

 

Machining time (s) 150 m/min 

“A” 


Competitor 

(ø13) 

Toolholder : TDX130L052W20-4 (ø13) 

Insert : XPMT040104R-DSAH120 


d=52 mm (L/D=4, blind hole) 

Vertical machining center 

wet cutting 

Vc =150 m/min 

Mild steel 

(JIS SS400) 

130HB 



wet cutting 

Vc =200 m/min 

Competitor 

(ø13) “B” 

Toolholder : TDX130L052W20-4 (ø13) 

Insert : XPMT040104R-DSAH120 

Stainless steel 

(JIS SUS304) 

170HB 



wet cutting 

Vc =140 m/min 

Competitor 

(ø13) “C” 






 

Chip packing 

 

 

 

 

 


 

 

 

 

 

 


 

 

 

 

 

 


 

 

 

 

 

 

 

 


 

 

 

 

Chip packing 

Unstable power consumption 

 

 

 

 


14

Selecting of L/D specification 

For the best performance, select the most appropriate tool for the 

machining depth. 

Comparison of L/D ratios and performance 

Followings are test results comparing the performance of L/D=2 and L/D=5 drills used for the same machining. 

The L/D=2 drill shows less tool failure and longer tool life. 

 

 

Tool failure 

Flank wear widthVB : 0.107mm 

Flank wear widthVB : 0.132mm 

Shape of hole bottom 

Stainless steel (JIS SUS304), 

170 HB 


After machining 171 holes 

(4.1 m in length) 


wet cutting 

ø12.5 DS (AH120) 

Vc=150 m/min 

f=0.05 mm/rev 

Machining diametermm 

 

 

 

 

 

 

 

 

 

 

Number of holes machined 

15

Machining data 

Recognize the high performance of TDX drills ! 

Tool life comparison in drilling alloy steel 

The chart at right shows a comparison of tool 

life curves of several drills in machining alloy 

steel. DJ insert (AH740) showed stable wear 

without any irregular failure. 

Alloy steel (JIS SCM440), 240HB 


Vertical machining center ø18, 

Wet cutting 

Vc= 100 m/min f= 0.08 mm/rev 

Corner-wear width of peripheral insert VC mm 

Competitor "B-1 " Competitor "A" 

Competitor "B-2 " 

 

 

 

 

 

Occurrence 

of chip 

entangling 

Broken central edge 

Competitor 

"C " 

 

 

Machining length m 

DJ (AH740) 

Tool life comparison in drilling stainless steel 

The following chart shows a comparison of tool life curves of several drills in machining stainless steel. DS insert (AH120) 

showed stable wear and superior wear resistance even in high-speed conditions. 

Corner wear width of peripheral edgemm 

 

 

 

 

 

Cutting speed : Vc =150 m/min 

Competitor 

“B” 

Competitor 

“C” 

Competitor 

“A” 

DSAH120 

 

Machining lengthm 

Corner wear width of peripheral edgemm 

 

 

 

 

 

Cutting speed : Vc =220 m/min 

Competitor 

“B” 

Competitor 

“C” 

Competitor 

“A” 

DSAH120 

 

Machining lengthm 

Stainless steel (JIS SUS304), 120 HB 

d=25 mm (blind hole) , Vertical machining center ø19 mm, 

wet cutting, f=0.08 mm/rev 

Proven economy 

Under the condition of Vc=150 m/min, 

machining costs per 1 m were calculated 

from the machining length before the 

corner wear width reaches to Vc=0.1 mm. 

The results are shown in the table to the 

right. The cost of TDX drill was 1/2 to 1/3 

times those of competitive drills. 

No. of corners 

per insert 

VC=0.1mm 

Tool life criterion 

Index of running 

costs 1) 

 

 

 

 

Competitor Competitor 

“A” “B” 

 

 

 

 

 

Competitor 

“C” 

 

 

 

1) Competitor “A” was placed to 100. 

Improvement in drilling stainless steel 

In this example, compared to a competitive drill, great 

improvement (600 pcs./corner, two times) in the tool 

life and cutting conditions was achieved. 

 

 

Stainless steel (JIS SUS304), 

120HB 

Drilling length: d=23 mm (Blind hole) 

Machine : CNC lathe (Wet cutting) 

Drill body : TDX180L054W25 

Insert : XPMT06X308R-DS (AH120) 

Vc=120 m/min 

f=0.06 mm/rev 

16

Machining of hardened steel with small diameter (ø13 mm) drill 

In the machining of hardened steel with small diameter drills, reliability to insert breakage was evaluated. 

Almost all inserts were broken in the competitive drills. However, the TDX drill showed normal wear 

and could continue further machining. 

 

Corner wear width of peripheral edge Vc mm 

 

 

 

 

 

Competitor “D” 

(Both central and peripheral inserts were broken) 

Competitor “B” 

(Both central and peripheral inserts were broken) 

Competitor “A” 

(Central insert was broken) 

DJ (AH740) inserts (Normal wear) 

 

Number of holes machined (Holes) 

Die steel (JIS SKD61), 50HRC 

Drilling depth : d=25 mm (Blind hole) 

Machine : Vertical machining center 

Drill dia. : ø13 mm 

Cutting fluid : Used 

Vc=100 m/min 

f=0.02 mm/rev 

Machining example of hardened steel 

After machining 1.5 m in length, the 

insert showed little tool-wear and could 

continue further machining. The 

machining was also stable. 

Forging die steel (50HRC) 

Drilling depth: d=45 mm (Blind hole) 

Machine : Horizontal machining center 



Insert : XPMT07H308R-DJ (AH740) 

Vc=80 m/min 

f=0.04 mm/rev 

Central edge 

(VN=0.08 mm) 

Peripheral edge 

(VBmax=0.03 mm, VC=0.08 mm) 

Improvement in machining hard material 

Previously used brazed carbide drills frequently chipped. After switching to TDX drills, they developed 

only small insert wear and improved surface finish. In addition, machining time was reduced to 1/10. 

60 

ø23 

High-chromium cast iron 

(52HRC) 

Drilling depth : d=60 mm (Blind hole) 

Machine : CNC lathe 



Insert : XPMT07H308R-DJ (AH740) 

Vc=40 m/min 

f=0.02 mm/rev 

17

Deep-hole drilling of low-carbon steel with large diameter (ø50 mm) drill 

This example shows test results in which low-carbon steel was machined with a large diameter (ø50 mm) TDX drill. 

In combination with DS chipbreaker, the drill achieved good chip control and stable machining without vibration. 

Power consumption 

Vc =200 m/min, f=0.07 mm/rev, 

Drilling depth =250 mm 

Machining time 

 

ø50 

250 

Mild steel (JIS SS400), 130HB 

Drilling depth : d=250 mm 

(L/D=5, Blind hole) 



Drill body : TDX500L250W40-5 

Insert : XPMT150512-DS(AH120) 


Feed : =0.07, 0.1 mm/rev 

MQL deep-hole drilling of carbon steel with small diameter (ø12.5 mm) TDX drill 

This example shows test results of MQL deep hole drilling of carbon steel with a small diameter (ø12.5 

mm) TDX drill. 

In spite of MQL machining, the drill achieved low-noise machining, good chip-removal, and excellent 

hole-diameter stability. 

Hole diameter (mm) 

13 

 

12.5 

12 

1 30 60 

Drilling depth (mm) 

ø12.5 

Carbon steel (JIS S55C), 220HB 

Drilling depth : d=63 mm (L/D=5, Blind hole) 


Cutting fluid : Semi-dry 

(Through tool supply, 2 cc/hour) 


Insert : XPMT040104R-DJ (AH740) 


Feed : f=0.06 mm/rev 

18

High efficiency machining with DW insert (GH730) 

Highly efficient, extra-low cost drilling has been realized ! 

Vf = 318mm/min 

Photographs below show tool wear on corners after drilling 5.2 m in length at cutting 

speed of 100 m/min and feed of 0.22 mm/rev. 

DW insert showed a small amount of initial wear. 


Drilled length : 5.2 m 




Insert : XPMT07H308R-DW (GH730) 



DW(GH730) 



Vf = 579mm/min 

Photographs below show tool wear on corners after drilling 5.2 m in length at cutting 

speed of 200 m/min and feed of 0.2 mm/rev. 

A combination of L/D=2-designed drill body and DW (GH730) insert has realized higher 

table-feed comparable to those of solid drills. 




Drill body :TDX220L044W25-2 

Insert : XPMT07H308R-DW (GH730) 



DW(GH730) 



Furthermore, the wiper effect of the insert produced a superior surface finish. Because 

of less tool-wear, deterioration of the surface roughness was not recognized. 

 

Surface roughness Ra m 

 

 

 

 

 

After drilling 

first hole 

DW 

(GH730) 

After drilling 5.2 m 



19

Finished hole diameters 

• TDX drills are not suitable for the drilling of holes requiring high accuracy. Differing from solid carbide drills, the 

finished hole diameter depends on three factors , 1. the accuracy of the insert , 2. the accuracy of the drill body 

, and 3. the oversize of the drilled hole. 

Therefore, a guideline for the hole tolerance is IT 12 or more. 

But, when using in a work-rotating condition, the finished diameter can be adjusted by offset machining. Even 

in tool-rotating applications, use of the eccentric sleeve (“EZ sleeve”) allows adjusting. 

• In some cases, the finished hole diameter machined with TDX drills is smaller than the drill diameter depending 

on the work material and cutting conditions. 

• When a severe tolerance to the finished diameter is required, a selection of drill diameter in consideration for 

the stock removal and finishing such as boring are required. 

• The charts below show the finishing diameters of TDX drills and competitive drills. In competitive drills, some 

variations in finishing diameters resulting from measuring points and cutting conditions can be seen. TDX drill 

showed stable finishing diameters. 

Accuracy of insert 

Accuracy of drill body 

Oversize of hole diameter to the real drill diameter 

Finishing diameter = Nominal drill diameter -0.1~+0.3 

Comparison of finishing diameters (ø34) 


Competitor “A” Competitor “B” Competitor “C” 

Carbon steel (JIS S55C) 

ø34, Vc=100m/min, Depth:3D 

 

 

 

 

 

 

 

Entrance Center Exit 

Hole-diameter measuring points 

 

 

 

 

 

 

 



 

 

 

 

 

 

 



 

 

 

 

 

 

 




ø34, Vc=180m/min, Depth:2.5D 

 

 

 

 

 

 

 



 

 

 

 

 

 

 



 

 

 

 

 

 

 



 

 

 

 

 

 

 



Stainless steel ( JIS SUS 304) 

ø34, Vc=150m/min, Depth:2.5D 

 

 

 

 

 

 

 



 

 

 

 

 

 

 



 

 

 

 

 

 

 



 

 

 

 

 

 

 



f =0.08 mm/rev f =0.1 mm/rev f =0.12 mm/rev 

20

Determination of tool life 

Change the tool a little earlier ! 

Tool life determination for insert 

As the insert failure develops, several phenomenons such as deterioration in chip controllability, 

increased cutting noise and increased cutting forces are observed. 

If the machining is continued as the failure is enlarged, it may cause breakage of the drill body. When 

the following phenomenons are recognized, index or change the tool a little earlier. 

• When excessive chipping or fracture is seen on the cutting edges. 

• When at least one of notch wear (VN), flank wear width (VB), and corner wear width of peripheral edge (VC) 

reaches 0.3 mm. 

• When the cutting noise excessively increases. 

• When chip controllability remarkably deteriorates. 

• When the net power consumption is increased by about 30 % compared to the beginning of cutting. 

Tool failure types of inserts 

For central inserts 

For peripheral inserts 

 

 

 

 

 

 

 

 

 

Insert failure and its effect on machining 

Chipping, Fracture, 

Flaking 

Rake face wear, 

Crater wear 

Flank wear, Corner 

wear , Notch wear 

• Variation in finishing diameters 

• Deteriorated chip control 

• Deteriorated surface finish 

• Deteriorated chip control 

• Increased power consumption 

• Occurrence of chatter 

• Variation in cutting noise 

• Deteriorated surface finish 

21

Tool life determination for drill body 

As same as in inserts, the drill body also fails by rubbing of chips. Excessively damaged drill body 

can not achieve the original performance. Therefore, when the following phenomenons are recognized, 

change the drill body to new one a little earlier. 

• When deformation, flaws, burrs, chip adherence are occurred on the insert pocket. 

• When the insert pocket is damaged with the insert breakage. 

• When the chip pocket is excessively damaged with the rubbing of chips. 

• When the excessive rubbing on the peripheral part of drill body is observed. 

• When the other phenomenons differing from the beginning of use are observed. 

Examples of damaged drill bodies 

Example 1: 

The chip pocket is scooped 

by rubbing of chips. 

Effects 

• A change in chip control. 

• Likely to occur chip packing. 

• The oil hole is exposed in some cases. 

Example 2: 

Damaged insert pocket accompanying 

with insert fracturing 

Effects 

• Bad influence on insert seating and clamping. 

• Likely to occur insert fracturing. 

Damaged chip pocket 

resulting from rubbing 

of chips. 

Damaged insert pocket 

Cutting forces 

The charts below show a guideline for cutting forces. Use TDX drills on a machine with ample power 

and sufficient rigidity. 

Guidelines for cutting forces 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cutting speed: Vc=100 m/min 

Work material: Alloy steel (JIS SCM440), 

240HB 

Cutting fluid: Used 

22

Surface finish 

Superior surface finish ! 

• A guideline for surface finish is about 25µm in maximum depth. It depends on the work material and cutting 

conditions. 

• When a better surface finish is required, a finishing operation is needed. 

• But, as shown in the Figure below, the use of DW insert achieves better surface finishes. 

• Surface finishes are improved as the cutting speed is increased and the feed is decreased. 

• When machining stainless steels and low carbon steels, the chip control is important. The surface finish 

obtained with DS insert is superior to those obtained with competitive inserts. 

Finished surface roughnessRam 

9 

8 

7 

6 

5 

4 

3 

2 

1 


Competitor “D” 


 

 

 

Work material: Carbon steel (JIS S55C) 

200HB 

Drill diameter: ø22 mm 


0 

0.1 0.14 0.18 0.22 

Feed f (mm/rev) 

TDX+DS 

 

RaRyRz 

50 

40 

30 

20 

10 

0 

-10 

-20 

-30 

 

-40 

-50 

-20 

Axial measuring points Entrance 

 

50 

40 

30 

20 

10 

0 

-10 

-20 

-30 

-40 

-50 

Cmpetitor “B” 

RaRyRz 

 

-20 -15 -10 -5 0 

Axial measuring points Entrance 

Work material: Stainless steel 

(JIS SUS304)180HB 



Feed: f=0.06 mm/rev 

23

Shapes of hole bottom 

Unevenness of the hole-bottom face machined with TDX drill is smaller than competitors ! 

The shape of the hole bottom machined with TDX drill is closer to 

flat compared with those machined with HSS drills. Even 

compared with competitive indexable drills, the TDX drill excels 

in flatness. 

Compare 

the 

difference ! 

Drill 

diameter 

Competitive indexable drills, brazed drills, and HSS drills 

Drill diameter ø13 ø15 ø20 ø25 ø30 ø35 ø50 

Competitors 0.8 0.8 1.6 1.8 1.9 2.1 2.8 

Brazed drills 2.4 2.7 3.6 4.5 5.5 6.6 9.1 

HSS drills 3.9 4.5 6.0 7.5 9.0 10.5 15.0 

Hmax 


ø12.5 ø15 ø17.5 ø22 ø27 ø33 ø42 

14.5 17 21.5 26 32 41 52 

Hmax 0.6 0.8 1.0 1.1 1.3 1.9 2.3 

Drill diameter øD 

Hole bottom shape obtained with TDX drill 

Competitive indexable-insert drill 

 

Example of hole-bottom finishing 

 

In addition to the maximum unevenness (Hmax) 

at the outer portion, the Hmax formed in the midsection 

is also smaller than those formed by competitive 

drills. Therefore, when finishing the hole 

bottom face, the toolholder of the finishing tool is 

less likely to interfere with the hole bottom. 

Height of unevenness 

Brazed carbide drill 

HSS drill 

 

Use of TDX drill on machining centers 

Check the specifications of the toolholder 

Selecting toolholders 

• Side-lock type toolholders for drills or milling-chuck holders 

commercially available from toolholder manufacturers are recommended. 

• Side-lock type toolholders for endmills are also usable, but the 

tool may be secured with only one screw. 

• When using some of speed-accelerator type spindles and oilhole 

holders, the drill shank must be shortened to prevent interference 

with their hole bottom. 

Examples of side-lock type toolholder for 

drills. 

• BIG: Sidelock drill holder 

Example of type:BT50-TSL32-105 

• KURODA: DA type sidelock holder 

Example of type:BT50-SLDA32-120 

• NIKKEN: Sidelock holder (for drills) 

Example of type:BT50-SL32C-105 

Adjusting drilling diameter 

• By using commercially available eccentric 

toolholders or “EZ sleeves” (eccentric 

sleeves specially designed for TDX drills), 

drilling diameters are adjustable. 

• As for the use of “EZ sleeves”, see page 

43. 

• When using “EZ sleeves”, use commercially 

available side-lock type toolholder for drills. 

“EZ sleeves” 

(eccentric sleeves specially designed for TDX drills) 

24

Use of TDX drill on lathes 

Setting of drill body is a key factor 

Mounting the drill on turret (tool post) 

• Mount the drill body so that the cutting edges will be parallel to the X-axis of the machine. 

• In normal circumstance, the drill body is mounted so that the peripheral insert can be seen from the operator. In 

some machines, mounting of 180° opposite direction is also possible without problems. 

• As the driving flat of the drill shank is machined to be parallel to the cutting edges, by tightening the flat with the 

fixing screw, the cutting edges are to be parallel to the X-axis of the machine. 

Turret 

Cutting edges are to be parallel 

to the X-axis of the machine 

Direction of screwing of 

mounting screw. 

X-axis of machine 


 

Central edge 


In normal circumstance, the drill body is mounted so that 

the peripheral insert can be seen from the operator. 

Checking of cutting edge height 

• The cutting edge height is an important factor to carry out proper machining. 

• The center axis of the tool should be below the rotating axis of the machine by 0 to 0.2 mm. 

• Prior checking of the center height of the machine by using a reference bar is recommended. 

• In this case, the checking of the center height should be carried out at the same position as the overhang length 

of the drill. 

• When the reference bar is not available, the ground part of a boring bar can be used as a substitute. 

Below the center by 

about 0.2 mm 

 

Dial gage 

 

X-axis of 

machine 

Central edge 


Overhanga length of drill 

Reference bar 

The condition of cutting edge height is not appropriate, 

adjusting of the turret is basically needed. 

But, an easy adjusting method is described on the 

next page. 

Main 

spindle 

A substitution by using a boring bar 

Same as the overhang length of drill 

25

Checking of setting conditions by trial cutting 

• After mounting the drill body, check the condition of below-center 

by trial cutting before the real machining. 

• If the drill body is properly set, a core of about ø0.5 mm in 

diameter is left in the bottom of the hole. 

• If core is not left at all, it means “above- center”. If the core 

diameter is larger than ø1 mm, it means “excessive belowcenter”. 

In such cases, again check the cutting edge height. 

• For the conditions of the trial cutting, low feeds of less than 

0.1 mm/rev and drilling depth up to 10 mm are recommended 

as a guideline. 

About 0.5 mm in diameter 

Core in center portion 

Drilling depth: Up to 10 mm 

Adjusting of cutting-edge height 

When the condition of the cutting-edge height is improper, the following method is used for the adjusting. 

q In the case of “above-center” 

If machining is carried out in such condition, the center cutting edge is likely to be chipped. 

Rotate the mounting direction by 180°. If the mounting direction can not be changed, rotate the drill 

body by 180°. But in this case, additional machining of driving flat which is parallel to the cutting 

edge is required. 

Mounting direction 

Central 

cutting edge 

Peripheral 

cutting edge 


Rotating by 

180° 

Center of drill 

Central 

cutting edge 


Peripheral 

cutting edge 

Mounting 

direction 

w In the case of 

“a little (about 0.05 mm) above-center” 

In this case, in addition to the method q, shifting 

of the mounting position to another turret 

position may improve the condition. 

e In the case of 

“excessive (over 0.2 mm) below-center” 

If the drill body is mounted in such condition, the 

core diameter is increased. If machining is carried 

out as the core diameter is larger than 1 mm, it will 

result in an unstable machining condition such as 

heavy vibration. 

In such cases, adjust the cutting edge height by 

using “EZ-sleeve” (the eccentric sleeve designed 

specially for TDX drills) or adjust the accuracy of 

the turret itself. 

For the use of 

“EZ sleeve”, refer 

to page 43. 

26

Peripheral 

edge 


the machine 

Offset machining on lathe 

A larger hole than the drill diameter can be machined ! 

Offset machining 

• When the drill is used in a work-rotating mode such as in lathes, offsetting of the drill in the X-axis of the 

machine allows fine adjustment of the drilled hole diameter. 

• When the offset machining is carried out, the drill body should be mounted so that the cutting edge will be 

parallel to the X-axis of the machine. Mount the tool referring to the aforesaid setting method. 

Interference 

Central edge 

Decreased 

drilling 

diameters 

Central edge 

Peripheral 

edge 

Increased 

drilling 

diameters 

Offsetting to the direction of 

decreased drilling diameters. 

Displacement must not 

exceed -0.1 mm. 

Drilled diameters obtained by offsetting are roughly 

calculated as following. 

Drilled diameter = Drill diameter + Displacement X 2 

Example: 


Displacement: 0.2 mm 

Drilled diameter=20 + 0.2 X 2 = ø20.4 mm 

Central edge 

Displacement (+) 

Peripheral 

edge 

Offsetting to the direction of 

increased drilling diameters. 

Direction of increased drilling diameter (+) 

Maximum allowable displacement and maximum drilling diameters 


 

 

 

 

 

Max. displacement 

 

 

 

 

 

Max. drilling 

diameter 

 

 

 

 

 


 

 

 

 

 


 

 

 

 

 

Max. drilling 

diameter 

 

 

 

 

 


 

 

 

 

 

 

 

 

 


 

 

 

 

 

 

 

 

 

Max. drilling 

diameter 

 

 

 

 

 

 

 

 

 


 

 

 

 

 

 

 

 

 


 

 

 

 

 

 

 

 

 

Max. drilling 

diameter 

 

 

 

 

 

 

 

 

 


 

 

 

 

 

 


 

 

 

 

 

 

Max. drilling 

diameter 

 

 

 

 

 

 


 

 

 

 

 

 

 

 

 


 

 

 

 

 

 

 

 

 

Max. drilling 

diameter 

 

 

 

 

 

 

 

 

 


 

 

 

 

 

 

 

 

 

 

 


 

 

 

 

 

 

 

 

 

 

 

Max. drilling 

diameter 

 

 

 

 

 

 

 

 

 

 

 

• The allowable displacement has a dependence on the drill diameters. Offsetting must not exceed the maximum 

displacement shown in the table. 

• When causing insert breakage or vibration, reduce the feed. 

• To prevent the drill-body from interfering with workpiece, the displacement to the direction of decreased diameters 

should be within 0.1 mm. Even when setting within 0.1 mm, there is a possibility of interfering depending on the 

condition of the cutting-edge height and the hole straightness. Please check these carefully. 

27

Cautions when using on lathes 

Through-hole drilling 

When the drill penetrates the hole, uncut 

disc-like piece may fly-out from between 

the chuck jaws. 

This piece has sharp edges and is very 

dangerous. A guard to cover the chuck is 

required. 

Cover 

Disc-like uncut piece 

When a disc-like uncut piece is left on the exit side 

In machining gummy materials or high-feed machining, 

a disc-like uncut piece may be left on the exit side of 

the hole. By reducing the feed from the position of about 

3 mm toward the exit, the occurrence of the piece can 

be mostly prevented. 

Exit side 

When machining a large diameter hole in excess of the maximum drilling diameter 

When machining of a large diameter hole in excess of the 

maximum drilling diameter is required, there is a method in 

which the hole once machined by solid drilling is enlarged 

by boring in several steps as shown in the Figure at right. 

But, in the boring operation, the chip control is more difficult 

than that in the solid drilling. Therefore, use of a purposemade 

boring tool is recommended for the operation. 

When using on a lathe without internal coolant supply 

When the drill is used on a lathe without internal 

coolant supply, remove the taper screw from the 

flange of the drill body and connect a coolant 

supply hose to the position. By this, coolant can 

be supplied through the tool. ( This method is 

applied only to the drills of L/D=2 and 3.) 

In this case, the rear end of the drill shank should 

be plugged with the removed taper screw. 

Taper screw for pipe 

28

Special machining 

Special caution must be taken to the following machining ! 

Specially difficult machining types are described in this page. This machining should be avoided where 

possible by carrying out some prior machining. When having no choice but to do these types of 

machining, care should be taken to the following. 

(Stack drilling is excluded.) 

Surface conditions to be machined 

(1) Drilling into angled face 

When the engaging surface or exit-side surface is 

angled, set the feed to within 0.05 mm/rev. When 

using the drill of 4D or 5D design, prior flattening of 

the engaging surface by using an end mill is recommended. 

(2) Drilling into arc face 

When the engaging surface is arc, the feed at engagement 

should be set to within 0.05 mm/rev. The 

radius of the arc should be greater than the five times 

the tool diameter. 

 

 

Drilling of interrupted hole 

The feed during the penetrating and engagement in an interrupted portion should be within 1/2 of the 

standard condition. Before engaging in the interrupted portion, a disc-like chip produced in penetrating 

must be completely removed. 

29

Drilling of stacked plates 

In drilling of stacked plates, a disc-like chip is produced between the plates. This 

may increase a possibility of causing the insert and drill body to be damaged. 

Therefore, TDX drills are not recommended for this operation. 

Disc-like chip 

Clearance between 

plates 

Enlarging of pre-drilled hole 

• When enlarging a pre-drilled hole, the hole diameter should be within 1/4 of the diameter of TDX drill. If 

chips are not well controlled, peck-drilling or dwelling (about 0.1 sec.) is recommended. 

• As shown in Figure below, the bottom face of the hole machined with TDX drill is slightly convex. In the 

next process, if drilling is carried out to the face, the risk of drill breakage or poor hole straightness may 

be increased. After pre-drilling with another drill, TDX drill should be used. 

 

 

• For counterboring of a hole, TCB-type counterboring cutters are recommended. The TCB-type cutter 

provided with two effective cutting edges allows more efficient machining than TDX drill. In addition, 

the insert with dimple-type chipbreaker performs better chip control. 

 

30

About the MQL (Minimum Quantity Lubrication) machining 

What is MQL machining ? 

“MQL machining” is a new machining method where a minimum quantity (about 10 cc/hour) 

of lubricant mixed with air is supplied to the cutting point. 

This method features: 

q The temperature of the cutting edge is lower than that of in “Absolute dry-machining”. 

Therefore, existing tools can be applied to the machining. 

w Compared with “Cooled-air machining”, the required apparatus is simple and low cost. 

Nevertheless, pronounced effect on tool life can be obtained. 

The following are key points in carrying out “MQL machining”. 

Tips in selecting cutting conditions 

In MQL machining, compared with wet machining, chip shape varies remarkably depending on the feed rate. Referring 

to the following, select the proper conditions allowing stable chip removal. When selecting, find the conditions in 

which the chips produced with the central cutting edge are continuous coil-shape. 

Cutting conditions for reference 

Cutting speed : Vc=80 ~180 m/min Feed : f =0.03 ~ 0.08 mm/rev 

Preferable chip shapes in MQL machining 

Stably continuous coil-shape chips produced with central cutting edge 




TDX180L054W25 (ø18) 

XPMT06X308R-DJ (AH740) 

Alloy steel (JIS SCM440), 230HB 





Mild steel (JIS SS400), 150HB 





Unfavorable chip shapes in MQL machining 

When the chips produced with the central 

cutting edge are crushed or elongated 

without curling, reduce the feed. 

Crushed chips produced with 

central cutting edge 

Elongated chips produced with 

central cutting edge 

• Through-the -tool coolant supply is a must in MQL machining. 

• MQL machining is not suitable for some materials, which generate high-temperature during machining, such as stainless 

steels and heat-resistant steels. 

31

Cautionary points in use 

Cutting fluids 

• Water-soluble cutting fluids (such as JIS W1-2) should 

be used. Water insoluble cutting fluids are not recommended 

because their fumes may catch fire. 

• Fluid pressure of 1 MPa or greater and fluid quantity of 

7 lit/min or more are essential. 

• For 4D and 5D types, 1.5 MPa or greater and 10 lit/min 

or more are recommended. 

• Cutting fluid should be supplied through the oil hole of 

the tool. When there is no choice other than external 

supply, reduce the cutting speed by 20 % of the standard 

condition and limit the drilling depth to within 1.5 

times the drill diameter. External supply should be 

avoided for machining stainless steel and heat-resistant 

steels. 

Within 1.5D 

 


The flute length of TDX drills is a little larger than 

the maximum drilling depth. This is needed for 

chip removal when drilling to the maximum drilling 

depth. 

Drilling in excess of the maximum drilling length 

should be avoided. 


Flute length 


Additional length for penetrating 

When drilling to the maximum drilling depth, the 

additional length for penetrating should be within 

10 % of the drill diameter. 

Additional length for 

penetrating ≤ 0.1 X øD 

Use in work-rotating condition 

See “Cautions when using on lathes” on page 28. 

32

Troubleshooting 

Type and place of trouble Cause Countermeasures 

Abnormal wear of insert 

Chipping and fracture of insert 

Trouble and countermeasures 

Central 

cutting 

edge 

Peripheral 

cutting 

edge 

Common 

Central 

cutting 

edge 

Peripheral 

cutting 

edge 

Common 

Relief 

surface 

Relief 

surface 

Relief 

surface 

Crater 

Chipbreaker 

Rotating center 

of drill 

Peripheral corner 

area 

Unused 

corner and 

cutting edge 

Contact boundary 

Flaking 

Common 

Inappropriate cutting conditions 

Inappropriate cutting conditions 

Coolant types and supply method 

Vibration during machining 

Improper insert grade 

Looseness of insert clamping 

Excessive heat occurrence 

Remarkable chip rubbing 

Improper chip control • chip packing 

Misalignment in work rotating 

Machining in large offset 

Drilling into non flat surface 

Too high a feed rate 

Reuse of chipped corner 

Use of insert in excess of tool life 

Drilling into non flat surface 

Presence of interrupted portion on 

the way of machining 

Reuse of chipped corner 

Improper chip control • chip packing 

Chip recutting 

Mechanical impact 

Use of insert in excess of tool life 


Work hardness is too high 

Thermal impact 

Improper insert grade 

looseness in insert clamping 

• Increase cutting speed. 

• Reduce feed. 

• Decrease cutting speed. 

• Decrease cutting speed where feed is too low. Increase cutting 

speed where feed is too high. 

• Check that coolant flow is 5 lit./min or more. 

• Increase concentration of cutting fluid. 

• Use cutting fluid provided with sufficient lubricity. 

• Change to internal coolant supply if used in external supply. 

• Change to more rigid machine. 

• Change to more rigid work clamping method. 

• Change tool mounting conditions. 

• Change to T1015. (Refer to page 7) 

• Secure insert clamping screw. 


• Increase coolant supply volume. 




• Increase coolant supply pressure. 

• Change cutting conditions. 


• Displacement of drill center from machine center should be 0 to 

0.2 mm. ( in direction to below-center) 

• Use in range of allowable offsetting value. 

• Flatten entry surface in pre-machining. 

• Set feed within 0.05 mm/rev in non-flat portion. 

• Reduce feed to about 0.1 mm/rev. 

• Check corner-failure in changing and indexing of insert. 

• Index or change insert when corner wear width of peripheral 

insert reaches to 0.3 mm. 



• Set feed to within 0.05 mm in interrupted portion. 

• Check corner-failure in changing and indexing of insert. 



• Decrease feed 

• If used in peck-feeding, change to continuous feeding. 

• Index or change insert when notch wear width (VN) reaches to 

0.3 mm. 







• Change insert grade to GH730 (See page 7) 

• Fasten insert clamping screw securely. 

33

Type and place of trouble Cause Countermeasures 

Rubbing scratch on drill body 

Inferior hole accuracy 

Chip control 

Other trouble 

Periphery of drill 

body 

Hole diameter 

Surface finish 

Common 

Entangling 

Chip packing 

Common 

Chatter 

Machine stop 

Large burr 

Misalignment in work-rotating 

Offset-machining in excess of allowable value 

Offsetting toward decreasing diameter 

Drilling into or through non flat surface 

Fracturing of peripheral insert 

Workpiece deflection 

Chip packing 

Misalignment in work-rotating 

Improper offsetting. 

Drilling into or through non flat surface 

Workpiece deflection 

Coolant types and supply method 

Improper cutting conditions 

Insert failure 

Chip packing 

Looseness of insert clamping screw 



External coolant supplying 

Chips produced by central edge 

Improper coolant supply 


Use of excessively damaged drill body 



Excessively worn insert 



Insufficient machine power and torque 

Galling 



• Displacement of drill center from machine center should be 0 

to 0.2 mm. ( in direction to below-center) 

• Use in range of allowable offsetting value. 

• Change direction of offsetting. 



• Change insert. 



• Increase coolant pressure 

• Displacement of drill center from machine center should be 0 

to 0.2 mm. ( in direction to below-center) 

• Adjust offsetting value 




• Increase concentration of cutting fluid. 

• Use cutting fluid provided with sufficient lubricity. 



• Decrease feed. 


• Change cutting speed. 

• Increase coolant pressure. 


• Use in range of standard cutting condition. 




• Change to internal coolant supply. 

• Use peck-drilling method. 

• Insert 0.1-second dwelling before chip entangling. 

• Shift to higher cutting speed and feed conditions to shorten chip 

length.(Primarily, chips produced with central cutting edge are likely 

to lengthen especially in work-rotating machining.) 

• Change to internal coolant supply. 

• Increase coolant pressure. 

• Reduce feed 

• Increase cutting speed 

• Change drill holder to new one . 



• Increase feed 






• Decrease cutting speed and feed. 

• Change insert before insert is heavily damaged. 

• Check that taper plug screw has not come off from drill body. 

• Check condition of coolant delivery. 

• Decrease cutting speed and feed. 

• Change or index insert. 


34

R 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R 

Unit: mm 

TDX125L025W20-2 
























































 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R 

 

R 

 

 

 

 

L/D=2 (metric) 

Specifications of TDX drills 

35

36 

 

 

 

R 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R 

Unit: inch 

TDXU0500L2 


























 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R 

 

R 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L/D=2 (inch)

R 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R 

Unit: mm 

TDX125L038W20 
























































 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R 

 

R 

 

 

 


37

R 

 

R 

 

 

 

38 

 

 

 

R 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R 

Unit: inch 

TDXU0500 


























 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L/D=3 (inch)

R 

 

R 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R 

Unit: mm 

























































 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


39

R 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R 

Unit: mm 

























































 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R 

 

R 

 

 

 

 

 

 

 

 

 


40

Test report format 

Tungaloy Corporation 

REPORT#: 

DATE 

CUSTOMER 

TEL/FAX 

CONTACT 

TYPE OF 

OPERATION 

SALES ENGINEER 

PART DESCRIPTION 

WORK MATERIAL 

MATERIAL HARDNESS 

MACHINING OPERATION (SKETCH) 

MACHINE 

TOOL & TYPE 

RIGIDITY 

TYPE OF 

COOLANT 

COOLANT 

PRESSURE 

COOLANT 

METHOD 

HIGH 

MED 

WATER SOLUBLE 

AIR 

OIL 

DRY 

LOW 

TOOLING 

REQUIRED 

CUTTING 

PARAMETERS 

TOOL 

PERFORMANCE 

COST 

EVALUATION 

COMMENTS: 

TEST DATA 

TOOL DESCRIPTION 

HOLDER/BODY TYPE 

INSERT 

INSERT GRADE 

WORKPIECE/TOOL DIA. ( ) 

CUTTING SPEED 

( ) 

FEED RATE 

( ) 

DEPTH OF CUT 

( ) 

H.P. REQUIRED ( ) 

CUTTING TIME/LENGTH PER PIECE 

PIECES PER EDGE 

TOOL LIFE (MINS/INCHES PER EDGE) 

EDGES USED PER INSERT 

PIECES PER INSERT 

SURFACE FINISH ( ) 

REASON FOR INDEXING 

INSERT COST 

INSERT COST PER PIECE 

HOURLY MACHINE DEPT. COST 

MACHINING COST PER PIECE 

TOTAL COST PER MACHINED EDGE 

CURRENT 

1 2 3 4 

41

Specifications of inserts 


 

 

 

 

 

 

 

Insert Cat. No. 

Stocked grades 

Dimensions (mm) 

Applicable drill 

AH740 GH730 T1015 T313W A B T ød R diameters 

 

 

 

 

 

 

 

 

 

 

 


 

 

 

 

 

 

 





AH120 GH730 A B T ød R diameters 

 

 

 

 

 

 

 

 

 

 

 

DW chipbreaker 

 

 

 

 

 

 

 





AH120 AH740 GH730 A B T ød R diameters 

 

 

 

 

 

 

 

 

 

 

 

“EZ sleeve” for TDX-type TAC drills 

Use EZ sleeves for the following purposes 

Adjusting finishing diameter in 

milling 

Adjusting of the finishing diameter in tool-rotating 

applications such as on machining centers and milling 

machines. 

Adjusting cutting edge height 

on lathe 

Adjusting of the cutting edge height in work-rotating 

applications such as on lathes. 

By using EZ sleeve, the finishing diameter can be 

adjusted in the range from +0.6 mm to -0.2 mm. 

By using EZ sleeve, the cutting edge 

height can be adjusted in the range 

from +0.3 mm to -0.2 mm. It results in 

eliminating troubles caused by improper 

cutting-edge height. 

Scale for adjusting finishing diameter 

in milling (Periphery of sleeve) 

Scale for adjusting cutting edge height in 

turning (Front face of sleeve) 

42

Setting of EZ sleeve 

Adjusting finishing diameter 

in milling 

Adjusting cutting edge 

height on lathe 

As shown in the Figure below, set the EZ sleeve between 

the drill shank and the toolholder. 

As shown in the Figure below, set the EZ sleeve between 

the drill shank and the toolblock. 

 

Fixing bolt “A” 

 

Fixing bolt “B” 

 

 

Align the scale graduated on the periphery of the EZ 

sleeve with the center of the flat of the drill flange. 

In the Figure shown below, the sleeve is set so that 

the finishing diameter will be increases by 0.4 mm. 

 

Flange 

Align the scale graduated on the front face of the EZ 

sleeve with the center of the flat of the drill flange. 

In the Figure shown below, the sleeve is set so that 

the center of the drill will shift by 0.1 mm to the plus 

(+) direction. 

Fixing bolt “A” 


machine 

 

+0.4 +0.2 

Fixing bolt “B” 

 

When aligning the scales, insert the attached wrench into the hole on the periphery of the sleeve and rotate the sleeve. 

After aligning the scales, secure the fixing bolt “A” positioned closer to the drill. Then, lightly secure the fixing bolt “B” 

to prevent the sleeve from rotating. 

Specifications 

 

 

 

Sleeve 

Cat. No. 

EZ2025L43 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EZ2532L48 

 

 

 

 

 

 

 

 

EZ3240L53 

 

 

 

 

 

 

 

 

 

EZ4050L63 

 

 

 

 

 

 

 

 

Note: Select the sleeve so that the D1 of the sleeve will be same as the diameter of the drill shank. 

Cautious points 

• The scale should be used only as a guide. Measuring and checking of the real finishing diameter is essential. Especially 

when using for adjusting the cutting edge height on a lathe, the finishing diameter also varies with the adjusting. Check the 

diameter by try cutting. 

• When using the sleeve in milling, use a side-lock-type toolholder. Collet type toolholders and milling chucks should not be 

used for this purpose. 

• When heavy vibration develops during machining such as in combining with a long drill exceeding L/D=4 or requiring large 

amount of adjusting, reduce the feed rate. 

• If the finishing hole diameter is excessively adjusted to the minus (—) direction, the drill body may interfere with the hole to 

be drilled. Adjusting to the minus direction should be carried out, only when the finishing diameter is larger than the nominal 

drill diameter, as a means of fine adjustment. 

43

Worldwide 

Subsidiaries & Affiliates 

Head Office 

Solid Square 580 Horikawa-Cho, Saiwai-Ku, Kawasaki, 212-8503 Japan 

Phone: +81-44-548-9500 Facsimile: +81-44-548-9540 

International Operations Division 

Kokusai Shin-Kawasaki Bldg., 2-1-5 Kitakase, Saiwai-Ku, 

Kawasaki, 212-0057 Japan 


Tungaloy America, Inc. 

1226A Michael Drive, Suite A, Wood Dale, IL 60191, U.S.A. 


Sales of machining tools 

Tungaloy Europe GmbH 

Elisabeth-Selbert-Strasse 3, 40764 Langenfeld, Germany 



Tungaloy France S.a.r.l. 

6 Avenue des Andes, 91952 Courtaboeuf Cedex, France 

Phone: +33-1-64864300 Facsimile: +33-1-69077817 


Tungaloy Italia S.p.A 

Via E. Andolfato 10, 20126 Milano, Italy 



Tungaloy Cutting Tool (Shanghai) Co., Ltd. 

United Plaza 1505, 1468 Nan Jing Road West, Shanghai 200040, China 



Thai Tungaloy Cutting Tool Co., Ltd. 

11th Floor, Sorachai Bldg. 23/7, Soi Sukhumvit 63, 

Klongtonnue, Wattana, Bangkok 10110, Thailand 



Tungaloy Singapore(Pte.), Ltd 

50 Kallang Avenue #06-03, Noel Corporate Building, Singapore 339505 

Phone: +65-6391-1833 Facsimile: +65-6299-4557 


Tungaloy Australia Pty. Ltd. 

Suite 3, Compark Circuit, Mulgrave Vic. 3170, Melbourne, Australia 



Distributed by: 

ISO 9001 certified 

QCOOJ0056 

18/10/1996 

Tungaloy Co.Ltd 

ISO 14001 certified 

EC97J1123 

Production Division, 

Tungaloy Co.Ltd

What is TDX Drill

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