Hardinge® HCAC Collet Chucks offer collet capability for higher precision and accuracy when you need it. Increase productivity, capability and control when compared to 3-Jaw chucks. HCAC Collect Chucks offer faster job changeover at higher spindle speeds for reduced cycle times. Achieve higher precision and improved concentricity for optimum part roundness. Available in 42, 65 and 90mm sizes for A2-5, A2-6 and A2-8 spindle noses.