Clark Magnuson wrote:
I have a 2" long, 1/4" square Cobalt tool bit I have ground for cutting
internal threads with a boring bar.
The bit is too long to fit in the hole in the work.
My Dremel cut off wheel is very slow, and grinding an inch off would be
worse.

The tungsten carbide metal saw blades (for metal
cutting hand saw, the "blade" looks like a piece
of wire with crystals), MEANT for cutting ceramic
tiles, do work really well for cutting hardened
metals.

Kristian Ukkonen.