Rigid Shaft Coupling Bore Diameter 1 1 3/8 in Bore Diameter 2 1 in Bore Type Round Keyed Clearance Diameter 2.77 in Coupling Construction Two-Piece Coupling Material Carbon Steel Coupling Outside Diameter 2 1/2 in Different Bore Sizes Yes Keyway Depth 1 5/32 in Keyway Depth 2 1/8 in Minimum Bore Diameter 1 in Keyway Width 1 5/16 in Keyway Width 2 1/4 in Maximum Bore Diameter 1 3/8 in Maximum Speed 4 000 RPM Maximum Torque 9 600 in-lb Overall Length 3 5/8 in