#25 Chain idlers / tensioner for REV 5.5mm standoffs
thingiverse
This is a collection of chain idlers (or tensioners) which works with a 5/16" Hillman plastic bushing that fits over the REV 5.5mm standoffs. 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 bushing. We added a little machine oil to keep the plastic from galling. Here's the link to the bushings we used: https://smile.amazon.com/gp/product/B00MND8L6C/
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