Idler Pulley Conversion - 608 ZZ Bearing Cobblebot

pinshape

I had some bearings leftover from my Cobblebot build, along with other spare parts. I needed a few idler pulleys for a belt system I was working on, so I designed this conversion kit. The 2 outer pieces press fit onto the outside of the bearings and each other to create flanges for a GT2 timing belt to rest in. There is a 7mm gap between the 2 flanges. By scaling the Z axis, this could work for other width belts. The 2 inner pieces press fit onto the inside of the bearings and each other to create a centered screw hole for an M5 screw. These 2 pieces also ensure that there is no binding by creating a gap between the bearing and any fasteners you use. An additional set of 2 inner pieces can be used as a spacer if you need the idler to sit farther from whatever it is resting on. Be warned, all of these are intended to be a very tight fit. I used 0.1mm gap and 0.2mm gap so that the parts would not slide when in use. I assembled mine by hand, but you may need a vice or pliers to get everything together. If your printer is not producing mostly round circles or over-extruding, you might need to clean up the parts to get everything to fit. Print Settings Printer Brand: MakerBot Printer: MakerBot Replicator 2X Rafts: No Supports: No Resolution:.2 Additionally, many of the parts are using a multiple of 0.2mm, so I would recommend that layer height. You will get one layer in some places and two layers in others. You shouldn't need support or a raft.