Rigid Shaft Coupling Bore Diameter 1 7/8 in Bore Diameter 2 7/8 in Bore Type Round Keyed Clearance Diameter 1.75 in Coupling Construction One-Piece Coupling Material Stainless Steel Coupling Outside Diameter 1 3/4 in Different Bore Sizes No Keyway Depth 1 3/32 in Keyway Depth 2 3/32 in Minimum Bore Diameter 7/8 in Keyway Width 1 3/16 in Keyway Width 2 3/16 in Maximum Bore Diameter 7/8 in Maximum Speed 3 500 RPM Maximum Torque 395 in-lb Overall Length 2 in