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The tip that really improved my 4 jaw chuck work was to make a second key
I think a lot of problems people have with indicating material in a four jaw chuck starts with a not so accurate jaw presetting. If you just kinda eyeball it or use the rings on the chuck or whatever and you put the indicator on it and the hand starts spinning like a cartoon clock, well it gets a lot of folks in a tizzy. I have started measuring the stock closely and either use my scale or calipers in the method shown. It’s cut my time for indicating unbelievably. Cletus