Rigid Shaft Coupling Bore Diameter 1 30 mm Bore Diameter 2 30 mm Bore Type Round Clearance Diameter 58.7 mm Coupling Construction One-Piece Coupling Material Carbon Steel Coupling Outside Diameter 53 mm Different Bore Sizes No Keyway Depth 1 Not Applicable Keyway Depth 2 Not Applicable Minimum Bore Diameter 30 mm Keyway Width 1 Not Applicable Keyway Width 2 Not Applicable Maximum Bore Diameter 30 mm Maximum Speed 4 000 RPM Maximum Torque 475 N-m Overall Length 83 mm