Hello fellow members. I have a question and was wondering if someone could help me out. How could one figure out how much force is required to turn the shaft of say a large (9" diameter) DC motor directly from the shaft, and also with a lever of any length? Is there some sort of machine that has to turn it to measure it, and is this information available anywhere on the net? I am only interested in the numbers, so if someone has the information on say the amount of force required to turn a 9" DC motor I'll accept that as well.