Rockwell old table saw problem - Router Forums
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post #1 of 35 (permalink) Old 01-24-2015, 08:23 PM Thread Starter
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Default Rockwell old table saw problem

Hi. I'm new to the forum. I have an OLD Rockwell 34-580 table that worked fine in the past. Recently, after turning the saw on it's side in order to mount some casters, the saw overloaded. That problem is cleared, but now I'm unable to tighten the nut holding the saw blade. I can hold the blade with a block of wood, but the nut and shaft just spin, not allowing either tightening or loosening.

Any idea what may be wrong with the saw, or what I may be doing wrong.

Thanks for any ideas.
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post #2 of 35 (permalink) Old 01-24-2015, 08:54 PM
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Welcome to the forum Charlie. I can't help with your question but am sure someone will be along to give advice.

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Rockhampton, Queensland, Australia


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post #3 of 35 (permalink) Old 01-24-2015, 09:09 PM
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This can't be the solution because it's to darn obvious , but by chance did the inner spacer that sits on the back side of blade slide off the arbour shaft ?

Btw welcome to the forum
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post #4 of 35 (permalink) Old 01-24-2015, 09:13 PM
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I think that's at least a very good possibility.
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post #5 of 35 (permalink) Old 01-24-2015, 10:06 PM Thread Starter
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A little more info. The spacer is still intact. The motor shaft spins freely. Should it? Because it spins, when I put the wrench on the nut, there's nothing to "hold" it. When I power the saw on, the motor does run, but of course there's no cutting power since the blade spins.
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post #6 of 35 (permalink) Old 01-24-2015, 10:09 PM
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Hi Charlie and welcome. The above is one good possibility. I'm assuming you've always used 2 wrenches to tighten the blade down as I've never seen a hobbyist saw that didn't use that method. Is the saw blade sitting in the same position? I'm thinking of the washer's on a circular saw that have 2 flat sides that go over the flats on the arbor shaft. Maybe the inner one slipped and isn't seated? Just a thought. Turning it on it's side shouldn't have done anything but loosen a bunch of sawdust. There is no way I can imagine doing that having an effect on the blade and arbor.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #7 of 35 (permalink) Old 01-25-2015, 08:35 AM Thread Starter
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Default Picture of saw blade shaft

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Originally Posted by Cherryville Chuck View Post
Hi Charlie and welcome. The above is one good possibility. I'm assuming you've always used 2 wrenches to tighten the blade down as I've never seen a hobbyist saw that didn't use that method. Is the saw blade sitting in the same position? I'm thinking of the washer's on a circular saw that have 2 flat sides that go over the flats on the arbor shaft. Maybe the inner one slipped and isn't seated? Just a thought. Turning it on it's side shouldn't have done anything but loosen a bunch of sawdust. There is no way I can imagine doing that having an effect on the blade and arbor.
I inherited this saw from a friend and haven't used it much, but it worked fine. I haven't had to replace a blade yet. There were no tools for removing the blade. I've attached a picture of the shaft, blade and nut. As you can see, there's almost no room between the blade and the motor side, and the spacer washer does not have a flat surface to hold with a wrench. When I use a 1" wrench on the nut, it just spins the shaft, even when blocking the blade.

There is probably something stupid I'm not doing, but I'm at a lose. Next step is to dis-assemble the saw and see if that turns up anything.
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post #8 of 35 (permalink) Old 01-25-2015, 08:50 AM
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This is a direct drive saw, and not a belt drive?

If it's a belt drive, ie an older contractor style, you might be able to hold the belt and stop the shaft from turning. I know on some older saws there was no provision for an extra wrench to hold the shaft.

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post #9 of 35 (permalink) Old 01-25-2015, 09:19 AM
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Is it possible there is another spacer washer missing between the nut and the outer flat washer...? I'm thinking the nut might be bottoming out on the shaft portion of the shaft where there are no more threads.

I would take the blade off, put the outer washer and nut back on and see if the nut is able to go far enough to have held the blade.

Did you have the blade off when you turned it on its side...? maybe a spacer fell off without you knowing it.

Did you replace the blade for a thin-kerf blade after re-assembling...? again, an indication that you might be missing a spacer.

If it turns out to be that the nut is bottoming out at the end of the threads you may be able to add a spacer between the outer washer and the nut to give you some thread room.

Helpful if you post a picture without outer washer and nut...just to see what the threads and shaft look like...

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post #10 of 35 (permalink) Old 01-25-2015, 09:22 AM Thread Starter
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It's direct drive- however, that got me looking. On the side panel of the saw housing, there's an access hole about 1/2". Inserting a long screwdriver allowed me to "lock" the fins of the motor. Then tightening/loosening the nut was easy.

Thanks for all your replies
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