Originally Posted by
dgrobe2112
i really hope this isnt an issue we all have to deal with.. seriously.. you would think that with a longer motor.. the bearings being farther apart.. that the load on the outer bearing would be more than if the shaft were shorter like in the pro4.
Shaft length doesn't affect the load. It affects the angle, or deflection, as I think Chris A put it. The longer shaft would affect the bearing furthest from the pinion since the rotor shaft acts as a lever. Longer lever = less force against the far bearing. Shorter lever = more force.
A longer motor should preserve the 'non-pinion' bearing, and if you double up on the pinion bearing you have a more robust motor.
That said, no problems at all on my Castle 3800. I still might do the bearing trick though to help with longevity.