How can I remove copper windings on an armature by soaking it in acetone?

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  • Thread starter Thread starter John1397
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SUMMARY

The most effective method for removing copper windings from an armature involves heating the assembly in an oven, ideally at temperatures between 150° C and 250° C, to pyrolyze the thermal-set epoxy or lacquer insulation. A self-cleaning kitchen oven can be utilized for this purpose, but it is crucial to perform this process outdoors due to the smoke produced from burning insulation. Additionally, it is necessary to remove the commutator prior to heating to ensure a successful winding removal.

PREREQUISITES
  • Understanding of thermal-set epoxy and lacquer insulation properties
  • Familiarity with electric motor components, specifically armatures and commutators
  • Knowledge of safe heating practices and equipment usage
  • Experience with handling and disposing of burnt materials
NEXT STEPS
  • Research the thermal properties of thermal-set epoxy and lacquer insulation
  • Learn about the disassembly process for electric motor components, focusing on commutators
  • Investigate the use of self-cleaning ovens for industrial applications
  • Explore safety protocols for working with high-temperature equipment outdoors
USEFUL FOR

This discussion is beneficial for electric motor technicians, hobbyists involved in motor repair, and anyone interested in the safe removal of copper windings from armatures.

John1397
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TL;DR
Soak armature to free up windings
What is best way to free up copper windings on armature like maybe soak in acetone?
 
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I had a summer job once in an electric motor rebuild shop. They baked out the windings in an oven. I don't know the oven temperature, but it would have been hotter than a typical kitchen oven. And it had a means of dealing with the smoke from the burned insulation.

Maybe use the self cleaning cycle of a self cleaning kitchen oven? Do it outside because of the smoke.
 
Armatures are often wound with a two layer insulation. The outer layer is a thermal-set epoxy or lacquer. There will be a temperature at which the glue is pyrolysed. That is usually between 150° C and 250° C.

You will probably need to remove the commutator before heating.
 

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