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Old 09-17-2020, 10:13 AM   #1
DannL
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Default Coating the armature . . .

Any thoughts on what product would be suitable to coat the amature of a starter and/or generator (excluding the commutator of course). Polyurethane? Shellac?
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Old 09-17-2020, 10:19 AM   #2
RTPbee81
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Default Re: Coating the amature . . .

Good question... i just ordered a can of
CRC Urethane Seal Coat Viscous Liquid Coating, Red

hope this is the right stuff, it's identified in the Model A Generator book, says to soak in it but I ordered a spray can, Is this going to work or am I asking for Trouble
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Old 09-17-2020, 11:09 AM   #3
Jim Brierley
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Default Re: Coating the armature . . .

Should work fine.
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Old 09-17-2020, 01:06 PM   #4
fuzes45
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Default Re: Coating the armature . . .

Building transformers, dipped coil in Varnish and baked.


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Old 09-17-2020, 03:01 PM   #5
42merc
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Default Re: Coating the armature . . .

Glyptol, made by GE, used in the industry.
Buy at your local electrical supply store.

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Old 09-17-2020, 05:13 PM   #6
BRENT in 10-uh-C
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Default Re: Coating the armature . . .

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Quote:
Originally Posted by 42merc View Post
Glyptal, made by GE, used in the industry.
Buy at your local electrical supply store.
X2 on the Glyptol.

Local Grainger stores generally have it too.
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Old 09-17-2020, 05:59 PM   #7
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Default Re: Coating the armature . . .

Yes Glyptol. Have used for years on motor, alternator and starter repairs.
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Old 09-19-2020, 09:40 AM   #8
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Default Re: Coating the armature . . .

X4 on the Glyptol.

The power plant I worked at used Glyptol on EVERY motor, both exposed armature windings and the field coils. They claimed it prevented "working" of the wires under magnetic stress, and consequent wear-through of the varnish insulation.

It is a bitch to get off for re-winding, however. By the time you get to that point you're talking a major rebuild anyway.

It is also used a lot on the interior of cast iron motors/transmissions after tanking or blasting. Seals in the errant pieces of sand or grit and makes an interior surface the oil can "slip down on" easily.

https://www.amazon.com/Glyptal-Brush...516BM8VVKG3WC7

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Old 09-19-2020, 09:45 PM   #9
CWPASADENA
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Default Re: Coating the armature . . .

X5 on the Glyptol,

Have used it for a lot longer time than I would like to admit. The first time I used Glyptol was when I was working on Model A's to make a little money for collage. That was 66 years ago. Been using it every since.

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