A8 X and Y idler
thingiverse
I made this one because others I downloaded didn't have guards, and the belt wouldn't stay in the middle, causing it to rub against the wall of the belt tensioner, which would eventually damage the belt. This model is thick enough that it won't disintegrate after a couple hours of print time, making it quite convenient. No sign of wear here after more than 40 hours of print time. It's designed for 6mm belts with 2mm teeth and regular Anet A8 belts, fitting perfectly with the original bearings that slide right in (with a little help from a hammer and just the right amount of force). The model is only 8mm thick, ensuring compatibility with this brilliant belt tensioner.
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