Rigid Shaft Coupling Bore Diameter 1 50 mm Bore Diameter 2 50 mm Bore Type Round Clearance Diameter 85 mm Coupling Construction One-Piece Coupling Material Carbon Steel Coupling Outside Diameter 85 mm Different Bore Sizes No Keyway Depth 1 Not Applicable Keyway Depth 2 Not Applicable Minimum Bore Diameter 50 mm Keyway Width 1 Not Applicable Keyway Width 2 Not Applicable Maximum Bore Diameter 50 mm Maximum Speed 4 000 RPM Maximum Torque 2 250 N-m Overall Length 124 mm