fixing up AC motor for drill press

[mrbc]

Hi everyone

I have a vintage DP for which I'm changing the motor (I bought it with a very old Galvin split phase 1/4 hp, but it's super dirty and needs some TLC). I scored a 1/2 HP Dayton with capacitor start on CL. I had to swap the wires to change the rotation and found that the wire insulation is dried out and cracked. In the direction change, I had to re-position some of the wires and had the insulation on one pretty much flake off. I don't want to leave it like that as it's a short waiting to happen. However, it's kind of tight and the insulation is almost gone all the way back to the windings. I thought about trying to splice in a new section but I don't think It'll really work in this case. I thought about that liquid tape stuff. Anyone have experience with that stuff?? The other option I considered is slipping some heat shrink over the wire. Thanks.

Oh, and this motor needs a little cleaning too. What's a good way to clean the interior? I was thinking of using DeOxit
Bob

 

[nine4gmc]

CRC electric motor cleaner for cleaning the insides. I have redone a few old motors and I usually cut/solder in new wire from the windings to where they used to go. The problem with heat shrink is it makes the wire stiff and still brittle. Use short pieces of heat shrink at the solder connections only.

 

[mrbc]

Thanks. I'll look for the CRC cleaner. Any tricks for the cutting/soldering back inside the casing near the windings? Maybe it'll be easier than I think, but it'll be tight....

 

[nadogail]

I have used high temp "spaghetti " in similar situations with good results. Motor rewind shops have it.

 

[mrbc]

I have used high temp "spaghetti " in similar situations with good results. Motor rewind shops have it.

Interesting, what is "high temp spaghetti?"

 

[Packard V8]

The problem with heat shrink is it makes the wire stiff and still brittle.

Not sure my experience is the same. Why does flexible heat shrink make wire stiff/brittle?

jack vines

 

[nine4gmc]

When I tried heat shrink over stiff brittle wire, it became more stiff and the brittle wire insulation in it wore through the heat shrink over time. It was a mess, I should have cut the wire out and replaced it to begin with, I ended up doing that motor twice. YMMV

 

[dutchgray]

If I was not replacing the wire I would remove the old insulation and sleeve with some silicon tubing, but I would be replacing the wire if I could.

 

[mrbc]

I'll definitely be removing whats left of the dried out insulation. It's virtually crumbling the more I touch it. It's an older Dayton (but not that old), ironic thing is, before I had a chance to really take a close look at it, my press had an old Galvin from around 1910 or something like that (or maybe it's from the 30's like the DP likely is) . It has the old cloth insulated wire....

Anyhow, thanks for the insight...

 

[Virgil Cain]

This would work for you:

http://www.amazon.com/dp/B00SM5EC2M/?tag=atomicindus08-20