Motor pulley shifted

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Forum topic by adrianpglover posted 06-16-2016 12:20 PM 508 views 0 times favorited 8 replies Add to Favorites Watch
View adrianpglover's profile


43 posts in 947 days

06-16-2016 12:20 PM

Topic tags/keywords: tablesaw

So last night I was making some cuts in 2×4s that with the blade on my G1023RLWX at about a 2” depth of cut. I then turned it off, lowered the blade down to cut some 1/4” plywood. When I turned the saw on, I heard a bit of a light metal grinding sound, so immediately I turned it off. The blade normally spins freely for a while at this point, but this time it stopped in the first few seconds. Something was obviously binding, but I couldn’t find an issue with the blade or the arbor components.

Unplugged the saw and removed the motor. There I found that the motor pulley had slipped down the shaft, less than 0.05” total. There was a little scoring on the face of the pulley, so after a bit of light sanding, that was taken care of. The pulley had been grinding lightly against an imperfection in the casting of what is labeled in the parts list as Ref – 60V2, P/N – P1023RL060V2, Description – “ANVIL BASE V2.08.10”, which is basically the fixed portion of the height adjustment slide. The imperfection just looked like a small piece of slag, no higher from the surface than any of the other slag in there, so I couldn’t see why it was grinding.

I loosened the pulley set screws, pushed the pulley back to its original position, and tightened the screws back down. Put the motor back in, making sure that the belt was fully seated in both the upper and lower pulleys. Reconnected all the wiring, put all the covers back on, plugged the saw in, and turned it on.

When I turned it back on, for a very short period there was the sound of the belt slipping, but it went away quickly. Not sure if that means I got enough (or too much) tension on the belt. Followed the manual as far as getting the “correct” belt tension goes in that I couldn’t get a 1/2” deflection with “moderate” pressure. I don’t use the saw all that often as I have 2 kids under 3 (soon to be 3 kids), so I can’t recall if the belt slipping slightly like that on startup is normal. Probably is on a 5 hp saw…


8 replies so far

View distrbd's profile


2220 posts in 1870 days

#1 posted 06-16-2016 02:36 PM

Make sure the motor pulley, the arbor pulley are both in perfect alignment:

-- Ken from Ontario, Canada

View kizerpea's profile


774 posts in 1791 days

#2 posted 06-16-2016 08:25 PM

Put in a new set screw.


View MadMark's profile


971 posts in 877 days

#3 posted 06-17-2016 12:31 AM

Loosen, reseat & tighten the side tension adjustment, make sure the motor moves.


-- Madmark -

View adrianpglover's profile


43 posts in 947 days

#4 posted 06-17-2016 12:28 PM

Thanks for the suggestions.

Checking the belt alignment, while important, is a bit of a larger task than I’m prepared to do at the moment. Hopefully one day soon I’ll have a dial indicator and a few other setup tools that I can use for checking and adjusting my saw, but for now I’m going to have to back burner it due to time.

I hadn’t considered a new set screw. The screw is made of steel (although probably some cheap stuff knowing Grizzly) and the pulley is aluminum, so I would expect the aluminum to loosen up before the screw. I was planning on putting some thread locker in the set screw if I have this problem again. Thankfully there was only minor scoring since I decided to not let the saw run for very long once I heard the issue.

I think I’ll try to tighten the belt again. I’m not certain that the motor moved or that it moved very much last time. When I did it I wasn’t thinking about the weight of the motor being cantilevered so far out from the slide point. When I do it I’ll have to make sure and support the rear of the motor to make sure I get some sliding action.

Thanks again to all for the suggestions and advice.

View splatman's profile


546 posts in 823 days

#5 posted 06-17-2016 08:33 PM

Would it help to put threadlocker on the shaft to make the pulley stay put? Or would that make the pulley too difficult to remove should the need arise?

View Bob Kassmeyer's profile

Bob Kassmeyer

184 posts in 2349 days

#6 posted 06-18-2016 12:58 AM

If you use tread locker on the shaft a little bit of heat will loosen it right up when you want to move it. My old Craftsman table saw used to have this problem on the arbor shaft. About once a year it would loosen up and cause a problem.

-- Bob Kassmeyer, Nebraska

View CharleyL's profile


190 posts in 2788 days

#7 posted 06-18-2016 02:08 PM

A straight edge across the side of both pulleys will tell you if they are in line with each other. You don’t need a dial indicator.

If the pulley shaft hole is too large, putting a thin shim between the shaft and pulley may help, but it should be a very snug fit. Ideally a new pulley should be purchased with the correct size hole. Loctite Blue on the threads of the set screw will prevent it from loosening. An old machinist trick is to use two short set screws, one behind the other, to lock them in place. If you do this, write on the side of the pulley “Two Set Screws” with a Sharpie marker or paint marker so you don’t forget the next time you need to remove the pulley DAMHIKT. Many pulleys have more than one set screw hole, some positioned 90 deg to the first one, to help keep the pulley locked into place on the shaft. Make sure there is a set screw in each of the holes and that they are tight.


View mtenterprises's profile


933 posts in 2117 days

#8 posted 06-19-2016 01:19 PM

2 shorter set screws, one on top of the other, in the same hole will keep them from backing out. You will often find this on high HP machines but works well anywhere.

-- See pictures on Flickr - And visit my Facebook page -

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