Rigid Shaft Coupling Bore Diameter 1 30 mm Bore Diameter 2 30 mm Bore Type Round Clearance Diameter 53 mm Coupling Construction One-Piece Coupling Material Stainless 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 150 N-m Overall Length 83 mm