Bright - for nonferrous metal of good ductility.
- longer ebdurance as cutting taps
- higher possible cutting speed
- steady exactness of dimension and profile
- high stability of the forming threads
- high security against fracture
- no removal of smarf, no jaming of swarf
Good lubrication is very important when forming threads.
Use graphite lubrication/oil with lubricity or add suitable additives.