#25 Chain Idlers & bushing for REV 15mm extrusion
thingiverse
This is a collection of chain idlers (or tensioners) with a printable hub that fits over the REV 15mm extrusion. We at FTC11717 used this to add chain tension or chain routing for #25 size chain when needed to still have a structural piece of extrusion in the chain path. This works very well for making our ultrathin chassis. We printed in PLA, and with a little hand deburring (elephant's foot) the idler was able to spin quite well on the printed hub. We added a little machine oil to keep the plastic from galling.
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