I guess the idea of this thread is to learn more about how much you can overload a motor to get more power out of it.
For instance, I was poking around ebay just checking things out and came across
this motor.
It says it is a 4.5 hp motor. What is a rough guess at what I could get out of it at a higher voltage? What limits the amount of voltage I can use? What else could I do to get more power out of it? I know you can only run them like this for short periods of time because heat will be an issue. I'm thinking the brushes will be a limiting factor, but also the windings. Is there any good 'general rule' as far as this goes?