2 Jul
2014
2 Jul
'14
1:51 p.m.
Bronze is often used for bushings. That may be
specifically porous
oil-impregnated bronze.
Yes. I am not sure how suitable that would be for the earthing contact.
It might work... BUT... why change from the original material? It was
prsumably chosen for a rason, and graphite is not a difficult material to
get or ro shape. So why not stick to that?
The point about wear is a good one. Lapping (and polishing,
essentially the same thing) is done with a soft tool and abrasive dust.
The dust embeds into the surface of the softer of the two items (the
tool) and cuts the harder of the two.
Yes, that is the normal explanation of why clock pinions wear more than
wheels. Dust gets embedded in the brass wheel teeth and grinds away at
the steel pinion.
-tony