Torque & Speed How Much Is Enough? : Plastics Technology
Sep 01, 2002 · Torque = hp times a constant (5250 for ftlb or 9550 for Nm), divided by rpm. Or conversely, hp = torque times rpm divided by 5250 or 9550. There is also a formula for a theoretical number known as torque factor, specific torque, or torque density. Torque factor = torque divided by the cube of the center distance between the screws.