Thread mills cut a thread using helical interpolation. Helical interpolation involves moving three axes simultaneously. The X and Y axes move in a circular motion while the Z axis moves in a linear motion. This allows the same thread mill to cut both right and left-hand threads and to produce a variety of thread sizes (of the same pitch). All thread mills are made from premium submicron carbide and are stocked with and without an ALTiN+ coating. They are ground on state-of-the-art CNC tool-and-cutter grinders and have been engineered for high performance. Programming assistance is available.
New NPS Thread Mills
NPS thread mills cut NPSC, NPSL, and NPSH straight pipe threads. NPSF thread mills cut NPSF and NPSI straight pipe dryseal threads.
External - UNJ
These straight flute thread mills have the root radius that is required for the external "UNJ" thread.
Single profile thread mills will cut internal and external threads in a range of thread sizes with minimum side cutting pressure.
SPTM - EXJ
Single profile thread mills that cut external UNJ threads in a range of thread sizes with minimum side cutting pressure.
Long reach thread mills have three teeth and a helical flute that excel in internal deep threads and hard-to-cut materials.
Coolant Through Options. Straight flute thread mills come in a large variety of sizes and are crest cutting for internal threads only.
Staggered Tooth - UN
Staggered tooth thread mills will cut internal and external threads. Every other tooth removed in a staggered pattern for reduced side cutting pressure.
15° Helical Flute
The 15° helical flute thread mills are non-crest cutting for internal threads only. The helical flutes distribute the side cutting pressure.
30° Helical Flute
The 30° helical flute thread mills will cut internal and external threads. The helical flutes distribute the side cutting pressure.
NPT / NPTF
Coolant Through Options. NPT thread mills come in straight, helical and staggered tooth design. They will cut both internal and external threads. NPTF are for dryseal applications.
BSPP / BSPT
These straight flute thread mills have a 55° thread profile and cut the British Standard Pipe Parallel (BSPP) and the British Standard Pipe Taper (BSPT).
SPTM - Acme
Acme threading tools have a 29° thread angle and an elliptically ground neck for maximum strength.