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Dead length vs pullback collet chuck accuracy (5c collets)

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Existing threads seem sparse on this. The deadlength collet chucks are usually 2-3x the price. If I keep the diameter of my part within +/- 0.0003", what can I expect my positioning tolerance in the Z axis for a pullback type 5c collet chuck to be? I need to hold +/- 0.001" on the floor of two counterbores on a 0.8" diameter turned part.

I'm looking at buying a Royal pullback collet chuck, but I'm open to other brands, I just don't know what to look for.

Matt

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