X-Mozilla-Keys:                                                                                 
Cyprian Troyer wrote:

  Mr Lamar,

Just a couple quick thoughts on custom pulleys. If you can't find
existing pulleys to modify, a good machinist/gearcutter shouldn't have
any trouble making up the gears if you split them down the middle and
dowelled them together in the final assembly. The key on the output shaft
would also help maintain alignment of the herrringbone sections. If you
don't like the idea of using two pieces built up for the pulley, the
herringbone pattern would no problem to EDM into the surface of a
pulley.It would take a long time to burn, especially in order to get the
needed accuracy and surface finish, but certainly not impossible. I'll
ask at work if they'd mind terribly having me work on a prototype for
you.

Thanks, C.Troyer

I think that is a good idea. I need to call Goodyear and get 
an engineering catalog to see if they have 15 inch diameter
aluminum pulleys. Don't say airplanes! :-)

I think Teflon coating the pulley's would improve the efficiency
and let the belt run cooler.

Paul Lamar
 
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