On 01/15/2015 12:49 PM, whit3rd wrote:
On Thursday, January 15, 2015 at 9:30:47 AM UTC-8, Bill E. wrote:
Small AC motor has corrosion on the shaft (on both sides of rotor) that
is inside the bearings.
What is the best way to remove the corrosion

First, protect the bearings (you might want to replace and/or clean/relube them, but
that's another issue). Then, remove any loose material from the corroded area
(wire brush, if you can get access without endangering the wiring).
Any brown rust can be stabilized (turned to black oxide) with rust converter
chemical coatings, but I'd usually just rub on some wax and warm the area with
a torch.

Mainly, if there's any condensing moisture around, you want the surface to
be non-hydrophilic so moisture doesn't invade a rust pit and enlarge it...


Depending on the value of the motor and your shop equipment, you could
turn the shafts of the motor down a bit and put sleeve bushings in to
build it back up to the new bearings...you aren't planning on reusing
the old bearings, eh? With corrosion on the shaft the balls must be
nasty even if it looks sealed...

John :-#)#

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