What would you consider acceptable runout for an Adjust True chuck when switching from one diameter to another?
I recently purchased a used 4" Buck Chuck and although it's clean and has a new set of jaws; I'm surprised at the amount of runout when switching from one diameter to another diameter.
Buck Chuck
(Checked with the carriage locked, about 1/8 from jaws with a dial test indicator. )
If I zero on 1/4" material, the runout on other sizes is
3/8 = .007
1/2 = .008
5/8 = .003
3/4 = .006
1 = .005
(If I zero on 3/8.... the runout on 1/4 and 1/2 are both .006)
I bought this to replace my old non adjustable 3 jaw Chuck. Checking with the same standards.
OLD CHUCK
1/4 = .0045
3/8 = .0040
1/2 = .0010
5/8 = .0035
3/4 = .0035
1" = .0050
I understand that a 4 jaw is the way to dial in critical parts. I was just thinking that the scroll of this Buck Chuck has been damaged if any of these readings are over .003.
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