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On Aug 30, 5:57 pm, Qiset wrote:
I've got some round mild steel that is the perfect diameter for an
item I want to make. (0.187in dia) I have an 5 inch length that is
a bit out of round. Suspending one in in my mill with it's drill
chuck, the other end moves 0.028in when I turn in slowly.
I know I can get a larger diameter piece and turn it down but I was
curious if there was a way to true this existing piece.
Its just some that I bought at Lowes so, would annealling it help?

thanks,

Q

-It might be that your drill chuck is the problem. Do you have any rod
-that is 0.187 that you know is round? That you could chuck in your
-drill chuck to compare with the piece you think is out of round. Try
-laying your piece on a flat surface and verifying it is straight.
-
-I do not think annealing will help.


Me neither. Try a dowel pin, tungston, long shank drill, or rotary file in
the chuck and look again.

Depending on how solid your drill press is, you might try spinning and
tapping EASY with a hammer to true it up, or roll on a flat piece of steel
and tap it straight with a hammer. It's only 3/16, it shouldn't take much to
move it.

And before everyone kills me, be careful hammering on a drill or lath chuck.
Unless it is something tiny like this, you will proabably the "run out" in
the chuck.