Collet Chuck BT40-ER Spacification:
- Finish: Black Oxide
- Runout: .005mm/.0002in TIR
- Works on all BT 40 machines
- All critical tool holder surfaces precision ground
- Made from alloy structural steel hardened to 48 - 52rc
- 8000 rpms
- Collet nut is included
- Coolant thru capability
- Rear thread for pull stud is M16
