Upgraded motor & mount on 113 saw - issue/question

[wolfsburged]

I recently went through my early 50's vintage 113.27520 Craftsman table saw, replaced arbor bearings, did a minor restoration.

Now after all the reassembly I noticed that the motor wouldn't align up with the inner pulley well. I hadn't paid much attention before, but I saw that a spot weld had failed and the motor bracket was tweaked. I had to space one side out with washers to make the pulleys coplanar. I'm sure this contributed to the bearing failure. I put my new link belt on, and I still had a lot of vibration. I wasn't very happy! I was able to remove the belt and isolate the remaining vibration from the motor. I had ignored the motor thus far since the arbor bearings were very squeaky. Apparently the motor needed bearings too.

So faced with a motor needing bearings and a motor bracket that needed work, I ended up winning an auction on Ebay from someone selling a newer 113 saw 1.5HP motor, bracket, and pulley set.

I was able to install this which solved all of those problems. I also ended up getting a set of machined pulleys and upgrading from a 3/8" link to 1/2" link belt.

Now it seems to be running very nicely and smoothly.

One remaining question:

The new motor bracket I got has smaller mounting rods. Therefore I had to hold it level in order to adjust the two set screws to hold it tight. It does seem tight and not going anywhere, but there is more inherent slop possible here. Should I worry about this, or leave it be? If I need to address this, how should I go about it? See photo:

 

[Red Leader]

That to me looks like it could be an issue. If one of those stop screws loosens and the the whole thing loosens up and throws the belt, it could interfere with your work and potentially be dangerous.

If you post a 'WTB' on the OWWM classifieds board with the model number of your saw, you with undoubtedly find the right motor mount. These saws were so common that parts are everywhere. I could understand having to make do with whatever you could if you had a really rare saw, but since these motor mounts are common, it would be a good idea to find the right one for your saw. Just my $.02


Good luck!

 

[454ragtop]

Any chance you can get the rods out of the old mount, then drill the holes bigger in the new mount and switch the rods?
Jim

 

[jakemac]

Just make a sleeve to go over the rods and drill an over-sized hole in each sleeve for the set screw to engage the rods. You only need to take up the slack.

 

[wolfsburged]

I like the idea of a sleeve but not sure how to make one.

New rod diameter is 0.625" and old one is 0.745". They are 3.75" long.

 

[wolfsburged]

Well I found a sleeve bearing at McMaster that might work.

6381K6

Alloy 932 (SAE 660) Bronze Sleeve Bearing for 5/8" Shaft Diameter, 3/4" OD, 3" Length

$10.82 each (need two) plus shipping. Just trying to see if anyone has any ideas that might be available without shipping or better/cheaper?

 

[brianh]

I would not worry about it if its tight its fine.

 

[jakemac]

Try your local hardware store. There should be a drawer in the hardware fittings assortments with bearings. One of them may fit, or can be altered to fit.

Bronze ain't cheap.

 

[454ragtop]

Know anybody with a lathe? Easy enough to turn the ends of the original rods down to 5/8" and swap them.

 

[bubinga]

Just make a sleeve to go over the rods and drill an over-sized hole in each sleeve for the set screw to engage the rods. You only need to take up the slack.

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Thats what I was thinking.

 

[wolfsburged]

Sorry if the photos were too big before. They should be fixed now.

I was able to find these on Amazon to use as bushings:
5/8" ID Steel Spanner Bushing For 2" Caster Wheel 3/4" OD to 5/8" ID x 2-7/16"
http://www.amazon.com/gp/product/B00JMV2VIM/?tag=atomicindus08-20

Now the motor is much more securely fitted. Also made a new block off for the open rear for dust collection out of some scrap whiteboard and magnetic strips. It is sawing like a hot knife through butter now! Very happy!