ACME Thread Mill - Internal
The Internal ACME Thread Mill is designed for cutting high-precision internal ACME threads with superior accuracy and efficiency. Made from solid carbide for maximum rigidity and stability, this tool ensures clean, consistent thread profiles. It is available with an optional AlTiN+ coating to boost performance, extend tool life, and support higher cutting speeds. Ideal for producing single start threads, this single profile thread mill is suited for both 2G and 3G fit-class internal threads, making it a reliable choice for demanding power transmission and motion control applications.
| Thread/Pitch | A (Tool Diameter) | B (Length of Cut) | C (Neck Diameter) | Q (Length) | S (Shank Diameter) | OAL | Flutes | Uncoated Tool # | Uncoated EDP # | AlTiN+ EDP # |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/4-16 | 0.170 | 0.350 | 0.080 | 0.020 | 0.250 | 2.50 | 4 | SPTM170FA-16 | 120701 | 120725 |
| 1/4-16 | 0.170 | 0.500 | 0.080 | 0.020 | 0.250 | 2.50 | 4 | SPTM170FA-16L | 120704 | 120728 |
| 5/16-14 | 0.200 | 0.500 | 0.105 | 0.023 | 0.250 | 2.50 | 4 | SPTM200FA-14 | 120707 | 120731 |
| 5/16-14 | 0.200 | 0.750 | 0.105 | 0.023 | 0.250 | 2.50 | 4 | SPTM200FA-14L | 120710 | 120734 |
| 3/8-12, 7/16-12 | 0.235 | 0.600 | 0.130 | 0.026 | 0.250 | 2.50 | 4 | SPTM235FA-12 | 120713 | 120737 |
| 3/8-12, 7/16-12 | 0.235 | 0.900 | 0.130 | 0.026 | 0.250 | 2.50 | 4 | SPTM235FA-12L | 120716 | 120740 |
| 1/2-10 | 0.320 | 0.750 | 0.170 | 0.033 | 0.375 | 3.00 | 4 | SPTM320FA-10 | 120749 | 120758 |
| 1/2-10 | 0.320 | 1.200 | 0.170 | 0.033 | 0.370 | 3.00 | 4 | SPTM320FA-10L | 120752 | 120761 |
| 5/8-8 | 0.400 | 0.800 | 0.230 | 0.039 | 0.500 | 3.50 | 4 | SPTM400FA-8 | 120767 | 120785 |
| 5/8-8 | 0.400 | 1.300 | 0.230 | 0.039 | 0.500 | 3.50 | 4 | SPTM400FA-8L | 120770 | 120788 |
| 3/4-6, 7/8-6 | 0.490 | 0.800 | 0.260 | 0.054 | 0.500 | 3.50 | 4 | SPTM490FA-6 | 120773 | 120791 |
| 3/4-6, 7/8-6 | 0.490 | 1.300 | 0.260 | 0.054 | 0.500 | 3.50 | 4 | SPTM490FA-6L | 120776 | 120794 |
| 1-5 to1 1/4-5 | 0.620 | 1.250 | 0.350 | 0.066 | 0.625 | 4.00 | 5 | SPTM620FA-5 | 120803 | 120812 |
| 1-5 to 1 1/4-5 | 0.620 | 1.750 | 0.350 | 0.066 | 0.625 | 4.00 | 5 | SPTM620FA-5L | 120806 | 120815 |
| 1 3/8-4 to 1 3/4-4 | 0.745 | 1.500 | 0.425 | 0.082 | 0.750 | 5.00 | 5 | SPTM745FA-4 | 120821 | 120833 |
| 1 3/8-4 to 1 3/4-4 | 0.745 | 2.500 | 0.425 | 0.082 | 0.750 | 5.00 | 5 | SPTM745FA-4L | 120827 | 120839 |