Tool Grinder (maybe)

[stevec]

(11-15-2012, 07:51 PM)f350ca Wrote: Interesting screw up today.

I appreciate the phrase in connection with this problem.

(11-15-2012, 07:51 PM)f350ca Wrote: then single pointed a 7/8 14 tpi thread on the end. Cleaned it up with a solid die, then parted it off. The thread is crooked to the pin.

I've had that problem occur before and, I'm not sure whether the dietilts as ithe first point engages or what.
I hate power threading with a die unless it's securely held in a tailstock holder. I've now taken to continue the single point cutting til a sample female thread (i.e. nut) will thread on nicely.
Maybe it's because of broken or dull teeth on one (or more) of the 3 (or 4 or whatever) sets of teeth on the die.
I'm sure your counterbore solution will shoulder up with no problens