Rigid Shaft Coupling Bore Diameter 1 2 in Bore Diameter 2 2 in Bore Type Round Keyed Clearance Diameter 3.31 in Coupling Construction One-Piece Coupling Material Stainless Steel Coupling Outside Diameter 3 5/16 in Different Bore Sizes No Keyway Depth 1 1/4 in Keyway Depth 2 1/4 in Minimum Bore Diameter 2 in Keyway Width 1 1/2 in Keyway Width 2 1/2 in Maximum Bore Diameter 2 in Maximum Speed 3 500 RPM Maximum Torque 1 200 in-lb Overall Length 4 1/2 in