Motor Keyway Messed Up

[Mike Mulville]

That would be the cheap, fast and permanent option.

I haven't been able to find a unisaw three belt pulley with bushing.

[Wayne Lomman]

If your pulley wobbles, the bore is worn in the pulley. A worn key way causes backlash, not wobble. Get a new pulley and fit the key using Richard's method. The new pulley is a must otherwise all your effort won't fix the problem. Cheers

[Mike Mulville]

If your pulley wobbles, the bore is worn in the pulley. A worn key way causes backlash, not wobble. Get a new pulley and fit the key using Richard's method. The new pulley is a must otherwise all your effort won't fix the problem. Cheers

That's what I was thinking. Thanks Wayne.

[James A. Brown]

I have been a machinist and toolmaker and for a couple years worked in an electric motor shop doing mechanical repair. There are options, they could recut the keyway to a larger size and make a custom key to fit. Without seeing your pulley I can't say for sure but it could be repaired if you have enough room to make a sleeve large enough to have a new keyway cut in the sleeve. Not going to be cheap but do-able. Do take your motor and pulley both with you and see what they can do. Jim.

[Mike Mulville]

I have been a machinist and toolmaker and for a couple years worked in an electric motor shop doing mechanical repair. There are options, they could recut the keyway to a larger size and make a custom key to fit. Without seeing your pulley I can't say for sure but it could be repaired if you have enough room to make a sleeve large enough to have a new keyway cut in the sleeve. Not going to be cheap but do-able. Do take your motor and pulley both with you and see what they can do. Jim.

Thanks Jim. I have a very highly rated electric motor repair shop nearby and I'll see what they say. New motor is $450! H hopefully cheaper than that.

[Mike Mulville]

Finally got in there again and did some measuring. The motor pulley bore .750 on one end and .764 on the other. The motor shaft is .750 end to end, so that's good. The motor repair shop says it'll be about $150 bucks to machine a new keyway 180 degrees from the old one and they'd replace the bearings while they were at it. I could try the metal putty fix also. Looks like I'll be buying a new pulley either way at about $80. Anybody have a source for the pulleys any cheaper?

[Mike Kees]

Mike you said this is off a Unisaw ? Is it a triple belt pulley ? I have a bunch of Unisaw parts at my shop,goes hand in hand with buying and selling a couple Uni's... If you have the part number post it and I can check what I have.

[Zachary Hoyt]

I would look at Surplus Center, they have a lot of that stuff. If you need a triple I don't know if they have them, but for singles and doubles they're pretty cheap.
Zach
https://www.surpluscenter.com/Pulley...tional:3/4\%22

[Mike Mulville]

Mike you said this is off a Unisaw ? Is it a triple belt pulley ? I have a bunch of Unisaw parts at my shop,goes hand in hand with buying and selling a couple Uni's... If you have the part number post it and I can check what I have.

I believe it's the 41-644 HD 3 groove pulley.

[Dave Cav]

Anybody have a source for the pulleys any cheaper?

Go over to OWWM and put a WTB post on BOYD.

[Richard Coers]

See if Grizzly has a knock-off saw that uses a 3 groove. Most of their "engineering" involved making identical copies.

[Jared Sankovich]

See if Grizzly has a knock-off saw that uses a 3 groove. Most of their "engineering" involved making identical copies.

Its the g1023 saw, and likely will fit

[Mike Kees]

Mike I checked at my shop. I have two different diameters. Pretty sure that they should be the same diameter (both pulleys on saw from factory). Do you know the outside diameter of pulley you need ?

[Malcolm McLeod]

Late to the party, and sounds like you have a path forward, so this may be just for posterity..?

I also think others may have alluded to this, but if you can file or machine a 'wallowed' keyway up to the next size, and the mating piece (pulley in this case) is still good you can machine keystock with a 'step' - allowing it to fit both - for a whole lot less than replacing all the bits and pieces.

[Mike Mulville]

Mike I checked at my shop. I have two different diameters. Pretty sure that they should be the same diameter (both pulleys on saw from factory). Do you know the outside diameter of pulley you need ?

The bore is .75" and the outer diameter is 3.5" 3 groove.