Rigid Shaft Coupling Bore Diameter 1 1 1/4 in Bore Diameter 2 1 1/4 in Bore Type Round Keyed Clearance Diameter 2.29 in Coupling Construction One-Piece Coupling Material Carbon Steel Coupling Outside Diameter 2 1/16 in Different Bore Sizes No Keyway Depth 1 1/8 in Keyway Depth 2 1/8 in Minimum Bore Diameter 1 1/4 in Keyway Width 1 1/4 in Keyway Width 2 1/4 in Maximum Bore Diameter 1 1/4 in Maximum Speed 4 000 RPM Maximum Torque 5 000 in-lb Overall Length 3 1/4 in