ttpete
Well-known member
thanks Frank. The chuck measurements are similar to the bit. I did not isolate the location of the high point, just the delta when turning the assembly. There is some pitting inside the chuck taper, but no obvious scratches. The jaws looked clean.
I'll keep tinkering. And looking for another chuck to try out and compare.
You might try using Prussian blue on the taper, then just hold the chuck up over it and rotate to see where any high spots are.
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