Rigid Shaft Coupling Bore Diameter 1 1 1/2 in Bore Diameter 2 1 1/2 in Bore Type Round Keyed Clearance Diameter 2.89 in Coupling Construction Two-Piece Coupling Material Carbon Steel Coupling Outside Diameter 2 5/8 in Different Bore Sizes No Keyway Depth 1 3/16 in Keyway Depth 2 3/16 in Minimum Bore Diameter 1 1/2 in Keyway Width 1 3/8 in Keyway Width 2 3/8 in Maximum Bore Diameter 1 1/2 in Maximum Speed 4 000 RPM Maximum Torque 10 250 in-lb Overall Length 3 7/8 in