Oil Impregnated Spider Insert Coupling Size FC30 Outside Diameter 3 in System of Measurement Inch Maximum Speed 690 RPM Horsepower @ 100 RPM 5.10 hp Spider Material Bost-Bronz Maximum Torque 3 200 in-lb Parallel Misalignment 0.001 in Angular Misalignment 0.5 Degrees Color Bronze Compatible Hub Manufacturer Part Number FC30 Fail Safe Yes For Misalignment Type Angular Parallel Horsepower @ RPM 15.2 hp @ 300 RPM 35.0 hp @ 690 RPM Maximum Operating Temperature 250 Degrees F