- Jan 31, 2011
- BFE Nevada/San Marcos Tx
I'm refurbishing an older Union 3 jaw chuck with 2 piece reversible jaws, the #1 jaw has about .002" play between the upper and lower pieces in the tension/compression direction. On a 4 jaw chuck it would not be a problem, but its going to play hell with repeatability and runout on a 3 jaw. Simple solution would be a 1/8" wide by 3/4" long shim, if you could get it in without getting pinched between upper/lower halves, and easily lost if jaws are reversed. Other options that have come to mind are a schmear of JB weld, brazing, or silver solder, then file to fit. Still need to do some measuring to determine which surface needs to be built up. Searched previous threads, did not see this problem, ideas and suggestions would be welcomed.