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Reply by ChrisFranklin

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Posted on Random-Orbit Palm sander is posessed!

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ChrisFranklin

23 posts in 845 days


#1 posted 05-28-2012 01:35 PM

Bit of an old thread, but in hopes of helping somebody down the line: these sanders have 3 ball bearings. Two are for the two ends of the motor shaft like any other motor. The third is between the flywheel/fan and the sanding pad, and is slightly off-center, hence the random orbit. If this bearing seizes the RO sander becomes a high-speed direct-drive grinder. Sounds like this might be the problem in the OP. It’s part #23 in the drawing linked above, 4-5 bucks to replace.

-- Mud thrown is ground lost.


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