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.
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.
New 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.
New Straight Flute
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.