From what I've read, to get the jaws accurately ground at a specific diameter, you need a chuck grinding fixture of the correct size...
Here's a link to such a fixure:???
My browser complains that the site is not secure, but it shouldn't be a problem if you have even the stock antivirus software. I've made such a fixture for my Atlas chuck, but haven't found a decent grinder for it yet. That is something I intend to do something about with the 3 24vdc 150W motors I bought. Have the three motors, three speed controls, and one power supply so far...
HTH!
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by:
Good judgement comes from experience. Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise, Adapt, and Overcome. Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better
On Monday, January 16, 2023 at 11:30:32 AM CST, James Riser <jriser@...> wrote:
This might be of use to some of you. Somewhere I picked up a small Chinese 3 jaw chuck in "new" condition. This meant that the jaws held items a few thousandths off?center. I intended to use this chuck for one specific?job and needed it centered at this diameter. I opened the chuck to the required diameter, chucked a cylindrical diamond coated Dremel type tool in the tool holder, turned on the lathe, and slowly backed out. The diamond coated tool lightly ground off the high spots on the jaws. The chuck?has been accurate at that diameter ever since. It must be understood that such a cheap chuck will not necessarily be true at different diameters but this solution certainly improved the situation.
Bill in OKC too