This 6 inch 3-Jaw self-centering lathe chuck includes a chuck key, reversible top jaws, and mounting bolts.
This chuck has a 1.57″ (40 mm) through hole. The chuck can hold work up to 5.70″ (145 mm) in diameter.
This is a plain back chuck and requires a backplate adapter to mount it. Front mount chucks are designed to be used with rotary tables and other devices where back mounting chucks cannot be used.
The radial runout of a test bar held in this chuck, when the chuck is mounted true, is 0.004″ maximum.

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