$30 to repair a grinder, a gear motor turning a set of burrs? It's a
universal motor and now has new brushes- maybe. I got motors like that to
run temporarily by stretching the brush springs. There used to be a number
of suppliers that had odd replacement brush sizes.
Higher quality universal motors have embedded conductors called shunts in
the brushes, among other things. Hammer mechanics lose parts, cross-thread
screws and leave out parts like washers and lock washers. Sorry you found
one. The motor's days are numbered.
My spare grinders all found new homes when I got the Mazzer. I'm no help.
Cheers, Mabuhay, iechyd da -RayO, aka Opa!
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976
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