Re: Restoring Starter Armature

Posted by Doug Linden on March 27, 1998 at 12:14:38

In Reply to: Restoring Starter Armature
posted by Neil MacGregor on March 27, 1998 at 10:17:00

: I'm confused about restoration of the commutator.Some books say to undercut the mica separators after turning the commutator, while others say not to undercut.What's correct for the starter? Thanks in advance.
: Neil
Neil,
The proper maintenance for a communtator is to turn it down in a lathe and then undercut the groves.This is done to remove any mica that may protrude above the communtator surface.The best way to accomplish this is to start with a 3-cornered file ineach groove, followed by dressing that using a hacksaw blade, and finish off with 00 sandpaper to eliminate any slight burrs.
Hope this helps
Doug

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