Bob, That formula for torque applies to an electric motor. The torque produced BY the motor. You cannot transfer that formula over to a non electric pulley. Open the link below. It shows % torque as it relates to % speed. You will note that at 100% rpm (1750 rpm in this case) the torque is 100% (3 ft-lbs typical for a 1hp motor). Now using our shredder, the shredder pulley is spinning at 200 rpm, or about 10% of the motor. So, looking at the chart we see the torque at the shredder pulley is about 10% or about .3 hp.
The transmission analogy only holds water if we are talking about geared systems but in this case we are talking pulley/belted systems.
http://docs.engineeringtoolbox.com/documents/1503/electric_motor_speed_vs_torque_power.png
I think I'm about ready to go back to talking about tobacco. Anyone else care to join me?
The transmission analogy only holds water if we are talking about geared systems but in this case we are talking pulley/belted systems.
http://docs.engineeringtoolbox.com/documents/1503/electric_motor_speed_vs_torque_power.png
I think I'm about ready to go back to talking about tobacco. Anyone else care to join me?