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Reply by Derrick

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Posted on Keyed pulley, smooth shaft??

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Derrick

103 posts in 1555 days


#1 posted 08-29-2016 09:45 PM



It is very (very) unlikely you will need to upgrade the bearings on that motor to handle the radial load that a belt drive will subject them to. While the original design generated little radial force, manufacturers don t go out of their way to install smaller bearings until you start dealing with large motors, not consumer stuff. Grinding a flat on the side might not be ideal, but it will work and reliably for a long time if the pulley fits the shaft well.

- bigblockyeti


What BBYeti said ^^^^

I have an almost unlimited supply of those motors for free… My BIL has a pool service company, and like most pool service companies, they will replace a bad motor rather than attempt to fix it (faster, easier and larger profit). For 98% of them, it s either the bearings that have gone bad (causing the motor to squeal) or a bad start capacitor. They ship out the old motors by the pallet load as scrap metal, and I can rummage through them all I want to see if there is anything worth while to snag. Can t remember the last time I actually had to BUY a start capacitor :)

Point is, the bearings in those motors are standard 62xx series deep groove radial ball bearings. Exact same bearings in just about every other electric motor you will find on a typical wood working machine. They can certainly be used to power a jointer… but they are much longer than a more traditional motor, and as you have noticed, they have a threaded end to engage the impeller rather than a more common keyway/setscrew arrangement. While a keyway could be machined into the shaft, it would be cheaper and easier to just grind a flat.

Cheers,
Brad

- MrUnix

Well, these are great answers. Thank you guys!!
I at least want to look into bearings just for knowledge. It would be nice to at least know what I have, if/when it comes time to replace.

Right now it looks like I have ball bearings on the pulley side of the shaft, and I’m not sure what kind of bearing it is on the opposite end. It’s not ball or tapered roller. It looks fixed, and the shaft just rotates inside of it. Not sure how to better describe it.

Looking at different articles, I swear I’ve seen those deep groove radial ball bearings on both sides of the shaft. Am I wrong in thinking that’s a thing? Is that something worth looking into?

Again. Thank everyone for all of the help!


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