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Drill bits (turning)
Drill bits have soft material spun welded to the shank. If you stay behind the spin weld line you will have no trouble turning the shanks. HSS will be fine.
If you have ever spun a drill in a chuck you will notice a large gouge with build-up on the shank. Hardened drill material will just spin and burnish.
The aft material is soft enough to cut with a hack saw. Do a little test cut with a file to find the hard spin weld line ..stay away from it... good luck.. k
Last edited by kdiver58; 05-29-2008 at 10:01 PM.
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