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Glassband Process

Brush track is banded for ring removal. Steel core is wrapped with mica, cured, and machined to size.

Copper and mica segment pack is bored with a step, and tested prior to assembly.

Segment pack is assembled to mica wrapped core and checked for retained fit.

Grooves are cut into copper and mica segment pack. Commutator is heated and grooves are banded using tension of at least 600 lbs.