High Torque/High Precision Keyless Chucks, Jacobs 6JTCNC Machine

Precision tested and certified to 0.0016 in T.I.R. maximum at half capacity. For use on CNC machining centers in drilling, boring, counter-boring and milling operations requiring heavy penetration. Furnished with spanner wrench to allow the application of supplementary gripping torque. Light tightening increases gripping torque up to 3 times higher than hand tightening. Resists tool loosening on high-speed machines with right hand rotation and instant spindle stop.