On Tue, 09 Oct 2007 21:58:43 -0700, wrote:

On Oct 9, 5:45 am, Randy wrote:

Viton is great for high temp, use Buna-N it's cheaper. Polyureathane
is the ideal choice for drive belt useage.

Speaking of which, I think I screwed up on my pulleys. The ratios are
right, but I'm having a hard time finding a belt. Both pulleys are 3L,
but the motor one is 1" outer diameter. Which is quite small for bore
size. I didn't realize how small until I saw it. I just assumed that
if it was a 3L pulley, that a 3L belt would work. But I'm not sure it
will bend enough around something that small. Can I just use a flat
belt or something?

Funny, it's always the projects you thought would be easy that end up
tricky.

Dave
There are available V belts that are notched on the inside so that
they are similar in appearance to a timing belt. These will bend
around a smaller diameter easier.
ERS