Super Simple Belt Tensioner - M4
thingiverse
SSBT adapted for M4 screw and nut. I'm using an M4x30mm and M4 nylon locknut, and that's all the hardware required for each belt tensioner. Note that the side facing inward has been raised by 0.5mm to accommodate the larger screw. Works well on my Wanhao i3+'s Y axis. X-axis requires trimming the bottom bearing block or another solution to prevent the belt from rubbing on it, but I've left mine as is due to lack of time. See original Thing for more details. https://www.thingiverse.com/thing:1784375
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