Rigid Shaft Coupling Bore Diameter 1 3/4 in Bore Diameter 2 3/4 in Bore Type Round Keyed Clearance Diameter 1.5 in Coupling Construction One-Piece Coupling Material Carbon Steel Coupling Outside Diameter 1 1/2 in Different Bore Sizes No 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 3/4 in Maximum Speed 1 800 RPM Maximum Torque 563 in-lb Overall Length 2 in Shaft Locking Type Clamp On