Adapter bracket for different table saw motor mount? - Woodworking Talk - Woodworkers Forum
 
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post #1 of 7 Old 04-13-2013, 02:31 PM Thread Starter
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Question Adapter bracket for different table saw motor mount?

Hello! I currently own an old Rockwell cabinet saw, model 34-461. The motor on it is 1.5HP, 20 amp 110, and it is pretty shot.

I have a brand new Grizzly 2HP TEFC motor, part number G2536.

The problem is, the two motors have different mounts. The old Rockwell motor has the same mount as is on the Grizzly motor part number H5387.

Do any of you know where I can find adapter plates/brackets for the new motor? I could fabricate one in 20 minutes if I still had access to a machine shop, but sadly, I no longer do.

Here is a picture of the two motors. The black one is the new Grizzly, and the grey one is the old Rockwell

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Also, I am looking for a triple-V pully that is around 4" in diameter with a 5/8" bore. The old motor has a 3/4" shaft, so the pulley won't fit the new motor.

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Any help would be greatly appreciated. I have been scouring the web with no luck
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post #2 of 7 Old 04-13-2013, 04:15 PM
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something like this:

http://stores.renovoparts.com/-strse...ket/Detail.bok

and maybe here for a bushing to go from 5/8" to 3/4":

http://www.electricmotorwarehouse.co...ft_bushing.htm

i have no first hand knowledge of either of these suppliers, but it will hopefully get you started.

there's a solution to every problem.....you just have to be willing to find it.
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post #3 of 7 Old 04-13-2013, 05:44 PM
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Find the local vocational school and see if they would willing to make one for you. It looks like it would be an easy project.
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post #4 of 7 Old 04-13-2013, 08:19 PM
where's my table saw?
 
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conversion bracket

From flat base, type 56, to the Unisaw including dimensions!
http://wiki.vintagemachinery.org/Uni...ateMotors.ashx

other ideas:
http://www.diybanter.com/woodworking...tor-mount.html

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)

Last edited by woodnthings; 04-13-2013 at 08:21 PM.
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post #5 of 7 Old 04-13-2013, 10:54 PM Thread Starter
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Thanks for all your input! I think I found a replacement pulley bushing insert here:

http://www.electricmotorwarehouse.co...bushed_QTL.htm

Part number 3B44-SH and SH Hub Part No. SHX5/8 should do it!

$84 is a lot to spend on a bracket, I might just find someone with a hotbox, cut the ears of the old Rockwell motor, and weld them to a plate...
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post #6 of 7 Old 04-14-2013, 05:49 PM
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Jet cabinet saws have a bracket like that. Not sure if it would fit a Uni.
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post #7 of 7 Old 04-15-2013, 10:10 AM
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I had a similar problem but in my case I had no motor at all. I bought a new 3 HP Leeson from Electricmotorsite.com . Great price and service.

I don't know whether this is a concern for you , but an 'adapted' motor would probably have a negative effect on the value of your Unisaw. They have a great reputation and aren't generally considered just old Rockwell cabinet saws. They can have decent resale prices. Some buyers would be put off by a non-standard motor on a Unisaw. I know I would be.

You also need to check if the adapter bracket will cause interference problems between the motor and the cabinet. Through it's swing, my motor barely clears the cabinet and my cabinet has the big rectangular motor hole. The earlier Unisaws have a smaller egg-shaped hole and are prone to interference problems if the motor isn't just where it belongs. You can cut the cabinet, but then you are back to the problem I mentioned above, that the value of the saw is hurt.

You mentioned the original motor is 'pretty shot'. Sometimes new bearings and some servicing can get them running new again for not a lot of $$. Have you had a motor shop check it out?

Bill

Last edited by dodgeboy77; 04-15-2013 at 10:23 AM.
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