I've done a bit of interrupted cutting on (what I assume is) induction hardened axle shaft splines, and yeah, carbide inserts don't hold up great to that. Brazed carbide tooling works much better, as does solid triangle carbide inserts. Hss didn't hold up at all to that, literally turned to dust before making a cut.
Copper is so soft that I don't think it'd be an issue though. My first attempt on a commutator would be a positive cutting carbide insert, then failing that, a nice sharp hss tool.
I wouldn't even consider diamond cutting tools until I trashed everything else I had trying, lol.
Copper is so soft that I don't think it'd be an issue though. My first attempt on a commutator would be a positive cutting carbide insert, then failing that, a nice sharp hss tool.
I wouldn't even consider diamond cutting tools until I trashed everything else I had trying, lol.