- Motor Corrosion - 4 Updates
| Bill E. <BillE@spamnot.com>: Jan 15 09:30AM -0800 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 (chemical or mechaical) and try to keep the shaft as smooth as possible. i will use a teflon lube when reassembling. |
| whit3rd <whit3rd@gmail.com>: Jan 15 12:49PM -0800 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... |
| John Robertson <spam@flippers.com>: Jan 15 10:15PM -0800 On 01/15/2015 12:49 PM, whit3rd wrote: > 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 :-#)# -- (Please post followups or tech inquiries to the newsgroup) John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
| walter_evening@post.com: Jan 16 08:48AM -0800 Bill E wrote: > What is the best way to remove the corrosion (chemical or mechaical) > and try to keep the shaft as smooth as possible. i will use a teflon > lube when reassembling. WD-40 or Liquid Wrench in the bearings or bushings? |
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