[Al Skierkiewicz]

Originally Posted by Brandon Holley

We took them out to mount em up, and I gave each motor shaft a quick twist. The 1st one was perfect, teh 2nd one, was horribly bound up. About half of the rotation was flawless, the other half required a bit of effort to turn. We figured we'd put it in the drive train to see if it would work itself out, but it appears that it may be getting worse. Any comments to this??

Brandon,
What you describe is usually the armature contacting the magnet structure. There are a variety of causes for this. The most common is dropping the motor which puts a small bend in the motor shaft or shifts the magnet structure a little. Check for obvious signs of external damage. Replacement is the only real fix on this. A good check is to power the motor up outside of your gearbox and then let it spin down by itself. If there is any rubbing of the internal structure it will be evident at this time with noise and intermittant braking.