1-1/4 in, Nose Dia.
.2680 in, Clamping Range 3/16 in to 1-1/4 in, Features 140 Percent More Bearing Surface than Competitor Milling Chucks;For Quiet and Stable Heavy Milling;Nikken Patented Design;Nut Body Contact, Nose Clamping and Anti-Vibration Mechanism;Thick Body and Internal Slots Provide Extremely Strong Chucking Torque and Rigidity Milling Chuck, Taper Size H100, Hole Dia.53in Proj 2.149 in, Coolant Fed Coolant Through, Bore Depth 2.