Karl Townsend wrote:
I'm thinking of running three timing belts side by side on one pair of
pulleys. Do you think I can get away with just bumpers on the outside edge
of the pulley and three belts running beside each other? Or will they end up
climbing on top of each other? In other words do I need belt guide bumpers
for each belt? (hard to do in the space available - only room for two belts
then)

.200 pitch by 3/8 wide belt FWIW. I thought I had seen 1" wide belting in
.200 pitch when I started this design. Now, no can find.

Karl




What shape is the pulley? Any crowning will make the belts try to climb
each other.

OR make SURE that you need the inch pitch belts.

Gates shows a 5mm pitch belt 25mm wide in the 9293 series HTD belts that
would likely work IF the pulleys are metric pitch.
http://www.gatespowerpro.com/Comerge...tNavigateFrame

industrial power Transmission, then Synchronous belts, then Power grip
HTD belts, the 5mm pitch

--
Steve W.