JEL® Thread Milling Tool 1 2 Technical notes Material group Guideline values for thread milling 1.1 Strength Rm (N/mm²) m400 Hardness HB m120 v c (m/min) = Cutting speed f b (mm/rev.) = Drilling feed f z (mm/tooth) = Milling feed magnetic soft iron Surface TOMILL CUT uncoated XAM v c f z v c v c f z Material m/min mm/tooth m/min m/min mm/tooth 80-100 0,08-0,12 80-150 0,08-0,15 TiN 1.2 m700 m200 structural, case hardened steel 80-100 0,08-0,12 80-100 0,08-0,15 P 1.3 m850 m250 carbon steel 80-100 0,08-0,12 80-100 0,08-0,15 3 1.6 1.5 1.4 m850 m250 >850 m1200 m350 >250 >1200 >350 alloy steel alloy/heat treated steel alloy/heat treated steel 80-100 0,08-0,12 80-100 0,08-0,15 60-80 0,04-0,08 60-80 0,04-0,10 50-60 0,04-0,08 50-60 0,04-0,10 1.7 m1400 m400 hardened steel to 45 HRC 30-50 0,03-0,08 H 1.8 m2200 m600 hardened steel to 58 HRC 4 2.1 M 2.2 2.3 3.1 3.2 3.3 K 3.4 3.5 3.6 3.7 4.1 m850 m850 m250 m250 m1000 m300 m500 m150 >500 m1000 m300 >150 400- 200- 500 250 m700 m200 >700 m1000 m300 >200 m700 m700 m200 m200 stainless steel, sulphuretted austentic ferritic, ferritic & austentic, martensitic grey cast iron grey cast iron, heat treated vermicular cast iron spheroidal graphite cast iron spheroidal graphite cast iron, heat treated malleable iron >700 200 malleable iron heat treated pure titanium 60-80 0,04-0,08 60-80 0,08-0,15 60-80 0,04-0,08 60-80 0,04-0,10 60-80 0,04-0,08 60-80 0,04-0,10 80-120 0,08-0,15 50-80 80-120 0,08-0,15 80-120 0,08-0,15 50-80 80-120 0,08-0,12 80-100 0,08-0,15 80-100 0,08-0,15 80-120 0,08-0,15 80-120 0,08-0,15 80-120 0,08-0,15 80-100 0,08-0,12 80-120 0,08-0,15 80-100 0,08-0,15 80-120 0,08-0,15 80-100 0,08-0,12 40-80 0,04-0,08 40-100 0,08-0,15 S 5.1 4.3 4.2 m900 m270 >900 m1250 m300 >270 m500 m150 titanium alloys titanium alloys pure nickel 40-80 0,04-0,08 40-100 0,08-0,15 40-80 0,04-0,08 40-80 0,08-0,12 20-40 0,04-0,06 50-60 0,04-0,10 5.2 5.3 6.1 6.2 6.3 m900 900 m1200 m350 >270 m350 m700 m700 m100 m200 m200 nickel alloys, heat resistant nickel alloys, high heat resistance non-alloy copper short chip, brass, bronze, red brass long chip brass 20-40 0,04-0,06 30-40 0,04-0,10 20-40 0,04-0,06 10-30 0,04-0,08 100-300 0,10-0,15 100-300 100-400 0,10-0,20 100-300 0,10-0,15 100-300 100-400 0,10-0,20 100-300 0,10-0,15 100-300 100-400 0,10-0,20 6.4 m500 m470 Cu-Al-Fe alloy (Ampco) 60-80 60-80 0,08-0,15 N 7.4 7.3 7.2 7.1 m350 m600 m600 m600 m100 m180 m180 m180 Al, Mg non-alloy Al wrought alloy, breaking strain (A 5)
JEL® Thread Milling Tool 1. Problems possible causes solutions Chips packed or glued at the thread profile • poor coolant improve coolant (i.e. add flood coolant, lateral flute coolant supply for through holes) add coolant flutes flutes on shank 1 2 2. Thread go-gage doesn’t fit • thread too small reduce tool radius in offset register • chips in thread improve coolant 3 3. Thread is getting tapered • poor tool clamping improve tool holding (i.e. shrink fit holders) • thread milling feed too high reduce thread milling feed 4 5 4. Erratic tool wear • tool run out too high use better tool holders (i.e. shrink fit holders), check material for homogeneity 6 5. Chippage, tool breakage • feed rate thread milling too high reduce thread milling feed • vibrations check tool holder (don’t use modular systems!!), change feeds and speeds 7 6. Poor thread surface • tool overhang too long check part clamping an and fixture. Use multiple cuts when part is clamped weak • non-suitable tool for this application reduce cutting speed, increase feed/tooth, prefer conventional milling 8 9 Important: See chapter 9 for more application details and safety notes! 93
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KomPass - Threading
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Process for producing internal thre
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Index General information Tool sele
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JEL® Producing Internal Threads Pr
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JEL® Tool Selection Thread milling
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JEL® Tool Selection Taps TAREX TAR
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JEL® Tool Selection Roll form taps
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Thread Milling Tool MKG Page 1 Thre
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M 2,0×D JEL® MKG Thread milling t
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UNC 2,0×D JEL® MKG Thread milling
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G 2,0×D JEL® MKG Thread milling t
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MF 1,5×D JEL® MKG XH Thread milli
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JEL® Thread Milling Tool 1. Proble
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Thread Milling Tool MGF, UMGF Page
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JEL® UMGF Thread engagements 1 D1
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M 2,0×D 2,5×D 3,0×D JEL® MGF Th
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MF 2,0×D JEL® MGF Thread milling
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UNF 1,5×D 2,0×D JEL® MGF Thread
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G 1,5×D 2,0×D JEL® MGF Thread mi
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MF 1,5×D 2,0×D JEL® MGF XS Threa
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Fax to +49 7143 373233 JEL® VABOS
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Index Technical Informations Specia
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JEL® Special Solutions 1 PCD speci
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JEL® Tap drill diameters for mille
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M Metric thread Formed threads JEL
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Machining task: Thread: M10, depth
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JEL® Thread Milling, Drill Thread
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JEL® Torque calculations for tappi
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Machine requirements: To carry out
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JEL® Cylindrical Shanks for carbid
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Fax Order +49 7143 373233 KomPass -
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1 From stock or individually manufa
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1 2 A 3 B C D E 4 F G H 5 I J K L 6
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Numerical Index 1802 ... Order No.
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Numerical Index 8087 ... Order No.
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Numerical Index 8894 ... 8897 ... 8
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Notes 1 2 3 4 5 6 7 8 9 175
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TOOLS PLUS IDEAS - a PLUS for our c
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Outside Europe Egypt ZAHRANCO, ENGI