Or something. It's still mixing, but making a metallic grinding noise
for half of every blade turn. Is it stripping gears, slipping a belt
or what? Do they need a periodic lube job? And will it get worse or
do I just live with the grinding noise? Only use it for mixing small
batches of pizza dough, so no great loss. I've got a mixer and there's
always the well method.

Mechanically curious!