I,ve just dismantled a 59A & a 8BA generator because they looked rather crappy from the outside. Inside the cloth insulation tape is shot . Can i use standard black cloth insulation tape to replace the old stuff or is it special tape ? . Also there is no sign of paint anywhere on the inside , is this for ground purpose ? Surface rust at the moment. The two steel pads in the pic have allready been cleaned.
Wrap it with glass cloth tape. I use Scotch 3M 69 for this kind of stuff. Be careful with the varnish coating on the coils. The varnish insulates the wire in the coil from shorting to itself. If the varnish is compromised, Glyptal insulating enamel can be used to repair it. Good luck
That's probably asbestos cloth.... What you probably need these days is something fiberglass-based for the heat. Something like this.... https://www.mcmaster.com/high-temperature-tape/high-strength-fiberglass-electrical-tape/
This high strength fiberglass electrical tape has the following warning - "The cloth can absorb electrical insulating varnishes." - Not quite sure how that plays out on keeping the windings insulated... EDIT: See the post immediately below, This cloth can be used with a fresh application on insulating varnish. Thanks to @Crazy Steve for this explanation.
That's not a warning, they're pointing out it can be varnished to help keep it in place. Which wouldn't be a bad idea.... This can be bought already varnished, but it's hard to wrap around anything neatly.
No, you don't... In fact, I'm a bit surprised to see those as a single chunk of metal. You will get a stronger magnetic field if the 'core' is laminated which you can see if you open up any small electric motor, or just look at the generator armature. But you do want to keep the thickness of any coating to a minimum.
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