Rigid Shaft Coupling, Bore Diameter 1 30 mm, Bore Diameter 2 30 mm, Bore Type Round Keyed, Clearance Diameter 53 mm, Coupling Construction One-Piece, Coupling Material Carbon Steel, Coupling Outside Diameter 53 mm, Different Bore Sizes No, Keyway Depth 1 3.5 mm, Keyway Depth 2 3.5 mm, Minimum Bore Diameter 30 mm, Keyway Width 1 8 mm, Keyway Width 2 8 mm, Maximum Bore Diameter 30 mm, Maximum Speed 4,000 RPM, Maximum Torque 475 N-m, Overall Length 83 mm, Shaft Locking Type Set Screw