9mm Belt Splitting Jig
thingiverse
Cut a 9mm belt in half to obtain two 4.5mm belts that work well with 6mm pulleys; these are strong enough for most applications. For RepRap belt and pulley recommendations, visit http://mendelmax.com/tikiwiki/tiki-index.php?page=Choosing+Belts+and+Pulleys. To split the belts, print a guide, insert the belt through the slot, place an X-Acto or utility knife in the slot and notch, then pull the belt until it is divided.
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