Reply by Derrick

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Posted on Keyed pulley, smooth shaft??

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103 posts in 1558 days

#1 posted 08-29-2016 01:49 PM

I am going through the same thing, I picked up 5 3hp pool pump motors from my buddy. I only have 1 that has a shaft over 1/2 inch though. Be aware that pool pump motors are not meant to have a side load. I have seen where guys will replace them with side load rated bearings. I am considering cutting the threaded end off and keying it with an angle grinder. Matthias wandel and John heisz have done it this way for their homemade tools. If your bearing seats are cast into the impeller outshaft housing you have to trim it up to get the pulley closer to the bearing. post some pics and good luck

- DirtyMike

Thanks for the heads up on the bearings. I’ll get it pulled apart and see what I have.

I’ll also take a look at woodgears to see if there are examples of the keyway slots being cut.

Sounds like the wrong motor/bearings for a pulley and a belt drive. Silk purse out of a sows ear. Good luck, Cheaper/free is not always better. Live and learn.
Motor shafts where the key way slot would be are usually harden, I dont know about a threaded pool pump, if is it whould hard/expesive to have a key way slot cut into it.

- nightguy

Thanks for the advice. The motor might not be ideal, but I can’t be the first person to ever attempt something like this. If the cost of using what I have is going to be ridiculous, I’ll just cut my loss and move on. I’m sure I can throw the motor back on CL. If the fix is something similar to what DirtyMike described, I don’t see that as too big of a deal.

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