I work part-time for a non-profit medical equipment supplier, repairing and maintaining electric wheelchairs, scooters, etc.
I've repeatedly had to consign an otherwise perfectly sound machine to junk simply because the manufacturer no longer stock motor brushes for their older models. The brushes that _are_ available cost anywhere from $13 to $20 dollars each -- not each pair, each, dealer cost.
I've been measuring and recording brush sizes from as many different pieces of equipment I can and am looking for a source of generic carbon brushes for 24 VDC motors. I doubt there's much difference in the composition of the brushes as nearly all the motors have very similar current loads and power ratings. -- I.e. no copper-impregnated carbon compounds, etc. All seem very similar that way.
Of course, I'm also comparing the brushes that are currently stocked with the older versions as well. Sometimes we get lucky and a newer model's brushes fit the older machines. Still pricey as all heck, though.
I'm looking for a supplier to get the prices down for folks who have no funding source for repairs, etc.
Anybody know a good source for small quantities? (25-50 pairs) I can FAX or email pictures of the brush assemblies and their dimensions. Most incorporate the contact plate and springs. (for plain ol' screw-cap brush holders)
Most are about 1/4 X 7/16 X 1/2 to 3/8 X 1/2 X 5/8 Thickness, width, length.