NPT 15° Helical Thread Mill
Our NPT 15° Helical Thread Mills are designed for smooth, precise internal pipe thread milling with reduced cutting forces. The 15° helical flute geometry lowers side cutting pressure, resulting in improved surface finish and tool stability. Made from premium submicron grade carbide, these tools deliver exceptional strength and wear resistance. The optional AlTiN+ coating enhances heat resistance and extends tool life, making them ideal for high-speed applications. Engineered for performance and reliability, these thread mills are a go-to solution for accurate NPT threads in demanding materials.
| Thread Diameter/Pitch | A (Tool Diameter) | B (Length of Cut) | Q (Length) | S (Shank Diameter) | OAL | Flutes | Uncoated Tool # | Uncoated EDP # | AlTiN+ EDP # |
|---|---|---|---|---|---|---|---|---|---|
| 1/16, 1/8-27 | 0.222 | 0.461 | 0.018 | 0.250 | 2.50 | 3 | TMX222-27-H | 101351 | 101354 |
| 1/4, 3/8-18 | 0.270 | 0.636 | 0.027 | 0.312 | 2.50 | 4 | TMX270-18-H | 101357 | 101360 |
| 1/2, 3/4-14 | 0.440 | 0.890 | 0.035 | 0.500 | 4.00 | 4 | TMX440-14-H | 101363 | 101366 |
| 1 to 2-11.5 | 0.550 | 1.171 | 0.043 | 0.625 | 4.00 | 4 | TMX550-11.5-H | 101369 | 101372 |