Re: Timing Pulleys - Chain & sprockets?

an impressive combination. And cheap.

>
> BTW, a properly designed chain drive has no more backlash than a
> cable or belt drive. And it tolerates the shop environment rather
> well. Some will speak of chain stretch, but again proper setup,
> initiation/break-in and design reduce this to a non-issue for the
> types of machines where this drive makes sense..

Nice review. I have not found this on timing belts, but on Vee
belts, the spec of the stretch is something on the order of 80% of
the belt stretch will come out in the first 100 hours. the next in
the next 2,000 hours.

Chains would appear to be horrible in the first few days as they
broke in. make sure you have pleanty of room for adjustment and
check them often and adjust when needed.

Dave

>
> Hope this helps,
>
> Ballendo
>
> P.S. What you DO get in exchange for these tradeoffs is... Speed.
> Even a cheap 200 RPM unipolar drive will get you moving at 180
> inches/minute!
> When John Kleinbauer starts offering plans based on this, remember
> you saw it here first!<G>