thermite....Shame on you undercutting is done on all large dc motors STILL, only starter motors are not undercut.. The hard copper brushes rub the mica away. Everything else is undercut with carbon brushes...Phil
....
"In YOUR shop" ... maybe.
As said.. old habits die hard. Easily as hard as Old Farts?
Not my problem. Even AS an "Old Fart".
If it actually WAS a problem?
The (composite) "carbon" (plus metals and ceramics. and, and, etc..) brushed motors would
quit a few hundred service-hours in.. when the separators stood proud of the Copper .. and bounced the brushes out of contact.... rather than run 2,000 to 6,000 POH.
They do not quit!
They wear smoothly as a team as they go along. Just as they were designed to do.
JF deal with that.
As the motors - which could not possibly care LESS, about your "opinion" . or MINE ..do.
"real world thing" as it were.
"Undercutting" is sorta like spritzing on underarm deodorant after a bath or shower..
Considerate, but..
..makes no nevermind in a world where your
next bath is scheduled 12 to 60 months into a hard-working future, does it!