Woodworking Talk - Woodworkers Forum

Woodworking Talk - Woodworkers Forum (https://www.woodworkingtalk.com/forum.php)
-   General Woodworking Discussion (https://www.woodworkingtalk.com/f2/)
-   -   Rebuilding blower motor (https://www.woodworkingtalk.com/f2/rebuilding-blower-motor-221691/)

Quickstep 08-01-2020 09:38 AM

Rebuilding blower motor
 
If you’ve noticed my other posts, I’ve just replaced the blower motor for my AC.

I planned to replace the bearings in the old motor to keep as a spare, but upon taking it apart, I noticed something I wasn’t expecting. Instead of ball bearings, it has what look like bronze bearings with some kind of wadding that I presume was there to hold oil.

Can these be re-built? Where could I buy the wadding? Is it worth doing?

The shaft is mildly scored, so I’d guess that ball bearings would be a better choice if such a thing exists.

And advice to be had?

Rebelwork 08-01-2020 09:50 AM

Blower motors aren't that much for your unit are they?

Quickstep 08-01-2020 11:44 AM

Quote:

Originally Posted by Rebelwork (Post 2126215)
Blower motors aren't that much for your unit are they?

The replacement was about $250. For me it's less about the money than it is about having a spare so Im not waiting for a replacement part to arrive.

furnacefighter15 08-01-2020 12:28 PM

Those are sleeve bearings, Ive never tried to order them.

What HP is your motor?

Find a buddy local that does HVAC, he can prolly get the same motor for 1/2 that or less.


Sent from my iPhone using Tapatalk

Rebelwork 08-01-2020 12:56 PM

I think mine runs 100-150 with the cage

woodnthings 08-01-2020 01:02 PM

Buy 'em or make 'em ....
 
They are typically made from thick felt with the proper OD and ID cut with a punch and die. Probably you could come close enough with some leather hole punches or a sharpened thinwall tube donno?:vs_cool:
https://www.google.com/search?client...4dUDCAs&uact=5

epicfail48 08-01-2020 06:30 PM

Toss up a picture. You can replace bushings the same way as bearings, though it is a bit more involved of a process since the sizing of a bushing can be a bit more touchy. Problem is the scoring on the shaft, thats not good. How noot good it is depends on how bad the scoring is

furnacefighter15 08-01-2020 08:05 PM

The bearings themselves are either brass or bronze. The oil wicking material would be cotton or some synthetic similar material.

I know that Menards has some brass bushing type bearings Ive used for other things, but I doubt for this purpose.

I personally do not think its worth rebuilding your motor. Its very replaceable.

Toss up a picture of the internals, you may be able to retrofit to ball bearings.

I assume its a direct drive motor.


Sent from my iPhone using Tapatalk

woodnthings 08-01-2020 09:06 PM

Broze bushings and scoring
 
Quote:

Originally Posted by furnacefighter15 (Post 2126377)
The bearings themselves are either brass or bronze. The oil wicking material would be cotton or some synthetic similar material.

I know that Menards has some brass bushing type bearings Ive used for other things, but I doubt for this purpose.

I personally do not think its worth rebuilding your motor. Its very replaceable.

Toss up a picture of the internals, you may be able to retrofit to ball bearings.

I assume its a direct drive motor.


Sent from my iPhone using Tapatalk


I like the idea of trying to restore it! It's cheap enough to attempt a repair. You would need to minimize the scoring using some 600 grit wet/dry backed with some tape to avoid tearing it. Using a shoe shine motion go around the place where it's scored and you soon see how smooth it gets. Then switch to the 800 grit or 1000 grit for the finish.
As to the bushings, they will be standard sizes, ID and OD. Using a digital caliper measure as best you can both the ID and OD and write those numbers down when you get to the online site or the bushing store you'll know what to ask for. Length doesn't matter that much, as you can saw and file to length. A lathe would be great or a drill press with an arbor you can hold them on.
The felt oil wipers are a no brainer. Just get them close to size, they will expand a bit if needed to slip them onto the shaft. Use a 30 wt oil for lube. I don't think there will be a large enough ID on the motor housing to fit a ball bearing in, but check that measurement with your caliper. It will be virtually the same as the OD of your
bushings.
:vs_cool:

Maintenance Man 08-02-2020 08:51 AM

My local hardware store carries various bronze sleeve bearings, but I wouldn't mess with it if it were me. Especially if the shaft is scored badly. I'd bet you can find another replacement motor for a lot less than $250.

OldDon 08-02-2020 12:22 PM

You can polish the shaft to near mirror finish with crocus cloth after removing the scoring with other methods.


All times are GMT -4. The time now is 07:04 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

 
For the best viewing experience please update your browser to Google Chrome