| • |
Taper pipe threads are being produced. |
| • |
The material is difficult to machine (e.g. high temperature
alloys and heat treated materials up to 62 Rc). |
| • |
The machine has helical interpolation and RPM greater
than 6,000. |
| • |
Thread specifications require special taps.
Usable threads are required to within 1 pitch of the bottom
of the hole or counterbore. |