Pete in Kansas posted:I'm also very interested in what Ron is asking about.
Jon if you have any pictures that would certainly be appreciated. I've been inside a few old SG motors but don't recall a phenolic ring but that's probably because I didn't know to look. When I shred one I get a whole rebuilt armature from Bob Hannon but a little preventative maintenance might save me from having to do that.
I just repaired one for Clem Clement, but returned it to him at the Chantilly train show. Will have to dig out some motors and take a picture.