Rigid Shaft Coupling Bore Diameter 1 1 in Bore Diameter 2 3/4 in Bore Type Round Keyed Clearance Diameter 2.06 in Coupling Construction Two-Piece Coupling Material Stainless Steel Coupling Outside Diameter 1 3/4 in Different Bore Sizes Yes Keyway Depth 1 1/8 in Keyway Depth 2 1/8 in Minimum Bore Diameter 3/4 in Keyway Width 1 1/4 in Keyway Width 2 1/4 in Maximum Bore Diameter 1 in Maximum Speed 4 000 RPM Maximum Torque 990 in-lb Overall Length 3 in Shaft Locking Type Clamp On