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Scuse my ignorance but what does it undercut?
Long ago, probably before you were born, generators were used on cars and trucks to charge the battery.Tom
That is the next part to be assembled, later today. It is welded in one spot from a bad fall, and needs a deep cleaning.
Is that original paint? If so, I wouldn't strip it as it looks "survivor" quality! Lots of info on how to breathe a little life and protect old paint. Scotchbrite wheel followed by a buffing will bring back some bling to the bare metal parts. Oh yeah,, have you had 15 Washingtons worth of fun yet???
the armature windings were connected to copper segments fastened together to make a commutator. The copper segments were clamped together but separated from each other electrically and mechanically with mica. As the segments would wear, the mica insulators would be exposed and had to be cut back so as to not wear the carbon brushes and minimize arcing. The action was called under cutting the mica or simply undercutting. S
Tom
Here is the starter armature that I'm doing for my 1938 pontiac. Also note the special armature chuck that is like a drill chuck with scalloped brass jaws and acts like a center-rest
View attachment 345349
How reliable are generators?.....my old crawler crane has a Gardner diesel engine with (I assume) a CAV generator shaft driven from the timing gears......the motor is 70 years old,Ive owned the crane for 40 years,and I have never had a close look at the generator due to its position,and dont know where the control box/regulator is.......this generator keeps the battery charged .Thats reliable.
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