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30° Helical Flute - UN Thread Mills

helical thread mill

The 30° helical flute thread mills will cut internal and external threads.

The helical flutes distribute the side cutting pressure.

  • Helical flute for reduced side cutting pressure
  • Non-crest cutting on the internal thread allows maximum flexibility for plated and non-standard threads

 

helical flute thread mill dimensions
MIN ID THREAD
/ PITCH*B3:M50		 “A” TOOL DIA. “B” LENGTH OF CUT “Q” LENGTH “S” SHANK DIA. OAL FLUTES ORDER # EDP #
UNCOATED AlTiN+ UNCOATED AlTiN+
INTERNAL OR EXTERNAL THREADS
10-24 0.125 0.350 0.019 0.250 2.50 3 TM125-24H TM125-24HA 103204 103348
10-24 0.140 0.392 0.019 0.250 2.50 3 TM140-24H TM140-24HA 103210 103354
10-28 0.140 0.407 0.016 0.250 2.50 3 TM140-28H TM140-28HA 103213 103357
10-32 0.140 0.388 0.014 0.250 2.50 3 TM140-32H TM140-32HA 103216 103360
10-48 0.140 0.383 0.009 0.250 2.50 3 TM140-48H TM140-48HA 103219 103363
1/4-20 0.170 0.520 0.023 0.250 2.50 3 TM170-20H TM170-20HA 103222 103366
1/4-24 0.170 0.517 0.019 0.250 2.50 3 TM170-24H TM170-24HA 103225 103369
1/4-28 0.170 0.514 0.016 0.250 2.50 3 TM170-28H TM170-28HA 103228 103372
1/4-32 0.170 0.513 0.014 0.250 2.50 3 TM170-32H TM170-32HA 103231 103375
1/4-36 0.170 0.511 0.013 0.250 2.50 3 TM170-36H TM170-36HA 103234 103378
1/4-20 0.187 0.520 0.023 0.250 2.50 3 TM187-20H TM187-20HA 103237 103381
1/4-24 0.187 0.517 0.019 0.250 2.50 3 TM187-24H TM187-24HA 103240 103384
1/4-28 0.187 0.514 0.016 0.250 2.50 3 TM187-28H TM187-28HA 103243 103387
1/4-32 0.187 0.513 0.014 0.250 2.50 3 TM187-32H TM187-32HA 103246 103390
1/4-36 0.187 0.511 0.013 0.250 2.50 3 TM187-36H TM187-36HA 103249 103393
1/4-40 0.187 0.511 0.011 0.250 2.50 3 TM187-40H TM187-40HA 103252 103396
5/16-18 0.235 0.689 0.025 0.250 2.50 3 TM235-18H TM235-18HA 103255 103399
5/16-20 0.235 0.670 0.023 0.250 2.50 3 TM235-20H TM235-20HA 103258 103402
5/16-24 0.235 0.684 0.019 0.250 2.50 3 TM235-24H TM235-24HA 103261 103405
5/16-28 0.235 0.657 0.016 0.250 2.50 3 TM235-28H TM235-28HA 103264 103408
5/16-32 0.235 0.669 0.014 0.250 2.50 3 TM235-32H TM235-32HA 103267 103411
5/16-40 0.235 0.660 0.011 0.250 2.50 3 TM235-40H TM235-40HA 103270 103414
3/8-16 0.290 0.775 0.028 0.3125 3.50 4 TM290-16H TM290-16HA 103417 103447
3/8-20 0.290 0.820 0.023 0.3125 3.50 4 TM290-20H TM290-20HA 103420 103450
3/8-24 0.290 0.808 0.019 0.3125 3.50 4 TM290-24H TM290-24HA 103423 103453
3/8-27 0.290 0.793 0.017 0.3125 3.50 4 TM290-27H TM290-27HA 103426 103456
3/8-32 0.290 0.794 0.014 0.3125 3.50 4 TM290-32H TM290-32HA 103429 103459
7/16-14 0.345 0.814 0.032 0.375 3.50 4 TM345-14H TM345-14HA 103462 103492
7/16-18 0.345 0.800 0.025 0.375 3.50 4 TM345-18H TM345-18HA 103465 103495
7/16-20 0.345 0.820 0.023 0.375 3.50 4 TM345-20H TM345-20HA 103468 103498
7/16-24 0.345 0.808 0.019 0.375 3.50 4 TM345-24H TM345-24HA 103471 103501
7/16-28 0.345 0.800 0.016 0.375 3.50 4 TM345-28H TM345-28HA 103474 103504
9/16-12 0.400 1.117 0.038 0.500 3.50 4 TM400-12H TM400-12HA 103507 103585
1/2-13 0.400 1.108 0.035 0.500 3.50 4 TM400-13H TM400-13HA 103510 103588
1/2-16 0.400 1.088 0.028 0.500 3.50 4 TM400-16H TM400-16HA 103513 103591
1/2-20 0.400 1.120 0.023 0.500 3.50 4 TM400-20H TM400-20HA 103516 103594
1/2-24 0.400 1.100 0.019 0.500 3.50 4 TM400-24H TM400-24HA 103519 103597
1/2-28 0.400 1.086 0.016 0.500 3.50 4 TM400-28H TM400-28HA 103522 103600
1/2-32 0.400 1.106 0.014 0.500 3.50 4 TM400-32H TM400-32HA 103525 103603
3/4-10 0.450 1.140 0.045 0.500 3.50 4 TM450-10H TM450-10HA 103528 103606
5/8-11 0.450 1.127 0.041 0.500 3.50 4 TM450-11H TM450-11HA 103531 103609
5/8-12 0.450 1.117 0.038 0.500 3.50 4 TM450-12H TM450-12HA 103534 103612
9/16-16 0.450 1.088 0.028 0.500 3.50 4 TM450-16H TM450-16HA 103537 103615
9/16-18 0.450 1.078 0.025 0.500 3.50 4 TM450-18H TM450-18HA 103540 103618
9/16-20 0.450 1.120 0.023 0.500 3.50 4 TM450-20H TM450-20HA 103543 103621

all dimensions are in inches

Thread mills can cut any larger size internal thread of the same pitch

30° Helical Flute-UN  

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Trademarks are the properties of their respective owner(s).

November 2024

The descriptions, illustrations, specifications, dimensions, and part numbers are subject to change without notice.


Servicing the Canadian provinces and territories of
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