Jaws in chuck not holding parts evenly

[mksj]

The Shar's chucks are pretty reasonable and are a good price for what you get. If you need better TIR for repeat operations then I would look at an adjustable (Set-Tru) type. I would go with 2 piece jaws. Better chuck jaws are often ground with a very slight taper increasing toward the back of the chuck jaws. Each jaw should be numbered corresponding to the chuck position.

6" 3 jaw Self Centering Scroll Lathe Chucks 2 Piece Jaws with 1-1/2-8" Fully Machined Threaded Back Plate

www.shars.com

CS63 6-1/4" 3 Jaw Cast Steel Self Centering Scroll Lathe Chuck

www.shars.com

6" 3 Jaw .0005" Adjustable Universal Chuck 2 Piece Jaws

www.shars.com

TMX 6" 3 Jaw Self Centering Manual Chuck Set Tru Plain Back 3-866-0600P

TMX 6" 3 Jaw Self Centering Manual Chuck Set Tru Plain Back 3-866-0600P

www.smalltools.com

 

[niknak]

Thanks everyone for your suggestions. I decided on the Shars 6". The first link that MKSJ suggested. I'll probably have to disassemble it for deburring, cleaning, and lubing before it's ready for use, but that seems to be standard practice these days for new stuff.