belt grinder torque question

[Ken S]

I'm just taking a guess at my own question. I believe the Penn State Industries variable speed motor is variable speed because of using DC power. If the power to the motor increases with higher speed; and if the surface feet per minute with the smaller pulley is approximately 60% of the larger pulley; to achieve the same surface feet per minute would require a higher motor speed, and, thus, more power. I would translate that into more torque.

Thoughts?

Ken