On 2010-04-07, Jim Wilkins wrote:
On Apr 7, 1:21?am, Ignoramus17356 ignoramus17...@NOSPAM.
17356.invalid wrote:
...

I thought I could reduce a shank of that drill bit by simply chucking
it in a lathe and taking off some diameter with a carbide tool. What
are the drawbacks, if any, of doing so?

i

HSS drill bits are easy to turn smaller but then they slip more easily
in the chuck. If you have 5C collets and a hex block or indexer you
could mill three flats to get it into the drill chuck.

Yes, I have one, and I will do just that, great idea. I did plan on
doing that.

21/32" is the tap drill for 3/4-10 so I wouldn't change it enough

Exactly why I need it, to tap 3/4-10 thread.

that it no longer fits the larger chuck.

jsw