Accusize Industrial Tools 5C 5'' Collet Chuck, Plain Back, for Lathe Machine

* Outside Diameter: 5". Max. RPM 6000. Accuracy: .0006 TIR. Weight: 10.44 lbs. * Plain Back, Recessed 3.740'' x 0.184'' Deep * Plain Back, have to shoose proper back plate to connet with your machine. Should be used with back plate (adapter) to connect with your specific lathe spindle. * Can use any size 5C Collet: Round collet :1/16 ~ 1-1/8"; Hex collet:1/8" ~ 7/8"; Square Collet:1/8" ~ 3/4" * Scroll and pinion design just like 3-jaw chuck, operated with chuck key. Scroll & pinion precision machined and hardened.