We did something similar in the machine shop. We chucked the bolt/screw
into a drill press and used files to shape the head to the desired
dimension.


"Arch" wrote in message
...
Hi William,

You know this dodge, but someone might not.

To better grind points, tapers or reduce the circumference of a metal
rod, etc. chuck the piece in a drill and rotate it against the rotating
grinding wheel instead of holding the piece by hand.You might want to
try this to adust the screw heads.

Remember to protect chucked small threads (the tops aren't flat) with
paper or wire .


Turn to Safety, Arch
Fortiter



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