High Precision Keyless Chucks, Jacobs 6JT

Precision tested and certified to 0.0016 in T.I.R. max at half capacity | Self-tightening feature automatically increases gripping force proportional to increased torque to prevent tool shank slippage | All components exposed to wear are completely hardened to maintain accuracy and extend chuck life | Jacobs taper mount permits use on a wide range of high accuracy drill presses, jig borers, milling machines and production drilling equipment