A technical drawing of a UN Multitooth 30 Degree Helical Thread Mill with dimensional callouts

UN Multitooth 30° Helical Thread Mill

Scientific Cutting Tools (SCT) is a family-owned business dedicated to manufacturing high-performance cutting tools, all proudly made in the USA. Our UN multi-tooth 30° helical thread mills provide exceptional speed and precision, combining a multi-tooth configuration for fast threading with a 30° helical flute to reduce side cutting pressure. The non-crest cutting design on internal threads allows maximum flexibility for plated and non-standard threads, ensuring a perfect fit every time. Crafted from premium sub-micron carbide, these tools deliver superior wear resistance and extended tool life. Explore our selection to optimize your threading applications.

Minimum ID Thread/Pitch	A (Tool Diameter)	B (Length of Cut)	Q (Length)	S (Shank Diameter)	OAL	Flutes	Uncoated Tool #	Uncoated EDP #	AlTiN+ EDP #
10-24	0.125	0.350	0.019	0.2500	2.50	3	TMI125-24H	103204	103348
10-24	0.140	0.392	0.019	0.2500	2.50	3	TMI140-24H	103210	103354
10-28	0.140	0.407	0.016	0.2500	2.50	3	TMI140-28H	103213	103357
10-32	0.140	0.388	0.014	0.2500	2.50	3	TMI140-32H	103216	103360
10-48	0.140	0.383	0.009	0.2500	2.50	3	TMI140-48H	103219	103363
1/4-20	0.170	0.520	0.023	0.2500	2.50	3	TMI170-20H	103222	103366
1/4-24	0.170	0.517	0.019	0.2500	2.50	3	TMI170-24H	103225	103369
1/4-28	0.170	0.514	0.016	0.2500	2.50	3	TMI170-28H	103228	103372
1/4-32	0.170	0.513	0.014	0.2500	2.50	3	TMI170-32H	103231	103375
1/4-36	0.170	0.511	0.013	0.2500	2.50	3	TMI170-36H	103234	103378
1/4-20	0.187	0.520	0.023	0.2500	2.50	3	TMI187-20H	103237	103381
1/4-24	0.187	0.517	0.019	0.2500	2.50	3	TMI187-24H	103240	103384
1/4-28	0.187	0.514	0.016	0.2500	2.50	3	TMI187-28H	103243	103387
1/4-32	0.187	0.513	0.014	0.2500	2.50	3	TMI187-32H	103246	103390
1/4-36	0.187	0.511	0.013	0.2500	2.50	3	TMI187-36H	103249	103393
1/4-40	0.187	0.511	0.011	0.2500	2.50	3	TMI187-40H	103252	103396
5/16-18	0.235	0.689	0.025	0.2500	2.50	3	TMI235-18H	103255	103399
5/16-20	0.235	0.670	0.023	0.2500	2.50	3	TMI235-20H	103258	103402
5/16-24	0.235	0.684	0.019	0.2500	2.50	3	TMI235-24H	103261	103405
5/16-28	0.235	0.657	0.016	0.2500	2.50	3	TMI235-28H	103264	103408
5/16-32	0.235	0.669	0.014	0.2500	2.50	3	TMI235-32H	103267	103411
5/16-40	0.235	0.660	0.011	0.2500	2.50	3	TMI235-40H	103270	103414
3/8-16	0.290	0.775	0.028	0.3125	3.50	4	TMI290-16H	103417	103447
3/8-20	0.290	0.820	0.023	0.3125	3.50	4	TMI290-20H	103420	103450
3/8-24	0.290	0.808	0.019	0.3125	3.50	4	TMI290-24H	103423	103453
3/8-27	0.290	0.793	0.017	0.3125	3.50	4	TMI290-27H	103426	103456
3/8-32	0.290	0.794	0.014	0.3125	3.50	4	TMI290-32H	103429	103459
7/16-14	0.345	0.814	0.032	0.3750	3.50	4	TMI345-14H	103462	103492
7/16-18	0.345	0.800	0.025	0.3750	3.50	4	TMI345-18H	103465	103495
7/16-20	0.345	0.820	0.023	0.3750	3.50	4	TMI345-20H	103468	103498
7/16-24	0.345	0.808	0.019	0.3750	3.50	4	TMI345-24H	103471	103501
7/16-28	0.345	0.800	0.016	0.3750	3.50	4	TMI345-28H	103474	103504
9/16-12	0.400	1.117	0.038	0.5000	3.50	4	TMI400-12H	103507	103585
1/2-13	0.400	1.108	0.035	0.5000	3.50	4	TMI400-13H	103510	103588
1/2-16	0.400	1.088	0.028	0.5000	3.50	4	TMI400-16H	103513	103591
1/2-20	0.400	1.120	0.023	0.5000	3.50	4	TMI400-20H	103516	103594
1/2-24	0.400	1.100	0.019	0.5000	3.50	4	TMI400-24H	103519	103597
1/2-28	0.400	1.086	0.016	0.5000	3.50	4	TMI400-28H	103522	103600
1/2-32	0.400	1.106	0.014	0.5000	3.50	4	TMI400-32H	103525	103603
3/4-10	0.450	1.140	0.045	0.5000	3.50	4	TMI450-10H	103528	103606
5/8-11	0.450	1.127	0.041	0.5000	3.50	4	TMI450-11H	103531	103609
5/8-12	0.450	1.117	0.038	0.5000	3.50	4	TMI450-12H	103534	103612
9/16-16	0.450	1.088	0.028	0.5000	3.50	4	TMI450-16H	103537	103615
9/16-18	0.450	1.078	0.025	0.5000	3.50	4	TMI450-18H	103540	103618
9/16-20	0.450	1.120	0.023	0.5000	3.50	4	TMI450-20H	103543	103621

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