2040 Belt Tensioner
thingiverse
The nut and puller are unchanged from the originals, but the case is modified to fit a horizontal 2040 rail and offset vertically so the belt does not rub the inside or top of the extrusion. It was made to work with my NEMA 17 motor mount ( https://www.thingiverse.com/thing:5352513 ), and uses the pulley parts from a TronXY X1.
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