Keyless Rigid Coupling Coupling Length 87.9 mm Coupling Material Carbon Steel Included Screws 148.1 mm For Motion Type 12 Zero Backlash Metric Screw Material 70 mm Maximum Speed 70 mm Resistance Properties Round Maximum Torque 80 mm Fastener Tightening Torque 11 953 N-m Outside Diameter Oil Dipped Overhung Load Capacity +0.000 mm / -0.152 mm Bore Type 60 N-m System of Measurement Metric Length through Bore (12) Locking Screw Screw Length 65 mm Number of Locking Screws M10