Quote:
Originally Posted by Chris is me
Also, relying on a 17mm wide pulley to fit two belts that are "about 8.5mm wide" seems like it's asking for trouble. Absolutely zero extra space for belts on a pulley isn't a great idea.
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I'd second this. On the prototype of last years gearbox we had two belts on the same pulley with no flange between them. Even with space between the belts, they would drift together and started to eat each other. Not enough for he belts to be anywhere near failing but there was plenty of rubber dust. I don't think it's a good idea to force the belts together.