Dauntless wrote:Oh, only time will tell. I'm wondering if a $500 motor needs to last 50,000 miles or such to be considered financially viable, or if this can do that. I just keep thinking that's a lot of power on that little shaft. . . .
It is sure that only time will tell. But apart bearings, brushless motors are indestructible if they are working in the right temperature range.
50,000 miles for a Pitbike is a little utopian, no? Anyway for all-terrain vehicles we use hours!!!
The shaft design/sizing is not done with the power but with the torque. A shaft of 10mm can easily transmit more than 20 Nm.