JKT High Precision Keyless Drill Chuck 1/8"-5/8" with J6 Taper

The Self-Tightening High Precision Keyless Drill Chuck features a capacity of up to 5/8" and a maximum runout of 0.0016". The self-tightening mechanism automatically increases clamping forces in proportion to the torque increase during drilling, preventing tool slippage in clockwise rotation. This chuck is designed for right-hand rotation applications and is suitable for use on high-accuracy drill presses, jig borers, milling machines, and production drilling equipment. Chucks mount to the machine with standard Jacobs tapers. All wear-exposed components are fully hardened to maintain accuracy and extend the chuck's lifespan. The JKT series allows for supplemental tightening with milled flats and included spanner wrench to provide up to three times holding torque to resist tool loosening on machines with instant spindle stop.