Belt Attachment with Tensioner

thingiverse

I am upgrading my CobbleBot 3D printer's X-axis and wanted a custom attachment that would combine a belt and tensioner to connect it to the Y-axis. Since nothing like this exists on Thingiverse, I created my own design which works incredibly well so far. However, I realized the initial design wouldn't fit my final model plans. Realizing it still might benefit others, I decided to upload it as a standalone item instead. The included Google SketchUp file allows for customization if needed. To assemble the belt attachment, two 25mm M5 bolts and two 10mm M5 bolts are required along with two M5 nuts (7.8mm flat-to-flat and 4mm thick) and a 38mm length of 3/16 inch or 5mm round stock. To follow the instructions: place the 10mm M5 Socket Cap bolts into their slots; align an Allen wrench through the end holes to attach the block with captive nut holes facing up; lower the nuts down and verify thread alignment before screwing in the 25mm M5 bolts through the end holes and captive nuts. Slide a piece of round stock through side slots, then attach the belt to it. Make sure the belt loop is wide enough for movement towards the block without any binding on the sides. Next, get the belt as tight as possible manually and finally, adjust the 25mm bolts to tighten the belt by pushing in the round bar.