Bore Diameter (Maximum) 6.875 in, Bore Diameter (Minimum) 2.4375 in, Bore Length 4.75 in, Coupling Component Hub , Coupling Size 4 , Coupling Style Gear , Coupling Type Metallic , DGC 4.0 RIGID HUB EXPOSED BOLT , Horsepower Per 100 Rat 350.0 HORSEPOWER, Lubrication Grease , Maximum Speed 3000.0 RPM, Maximum Temperature Rating 250.0 FAHRENHEIT, Minimum Temperature Rating -30.0 FAHRENHEIT, Rated Torque 220600.0 in_POUND, Shaft Attachment Rough Bore