Is upgrading to a Röhm chuck worth it on a Chinese lathe?

[Choiliefan]

This may have already been mentioned but some of the better chucks have a "set-tru" feature which enables the chuck body to be fine-tuned to the diameter of the bar stock in its grip. My Rohm and older Yuasa chucks have this feature. The famous "Buck Chuck" may have been the first to offer this long time ago.

 

[ChazzC]

This may have already been mentioned but some of the better chucks have a "set-tru" feature which enables the chuck body to be fine-tuned to the diameter of the bar stock in its grip. My Rohm and older Yuasa chucks have this feature. The famous "Buck Chuck" may have been the first to offer this long time ago.

If you machine the boss on the backing plate slightly smaller than the register on the back of the chuck you can achieve the same effect by loosening the mounting bolts on the chuck, tapping the chuck until you have the desired concentricity and then tightening the bolts.