Jaw Coupling Insert Coupling Size JC12 JS12 MJC19 MJS19 Outside Diameter 3/4 in System of Measurement Inch Maximum Speed 8 000 RPM Horsepower @ 100 RPM 0.0159 hp Spider Material Polyurethane Maximum Torque 5 in-lb Parallel Misalignment 0.005 in Durometer Hardness 85A Axial Motion 0.02 in Angular Misalignment 1 Degrees Color Blue Compatible Hub Manufacturer Part Number JC12 JS12 MJC19 MJS19 Deform Torque 10 lb-in Fail Safe Yes For Misalignment Type Angular Axial Parallel