Printable Linear Bearing For 8mm Rods

thingiverse

In MakerBlock's blog post on the MakerBot blog, tre3 proposed making a plastic linear bearing. The user tried using steel BBs for their bearings, as they liked how their previous ones turned out. Initially, they planned to arrange three racetracks in an equilateral triangle configuration, but it proved difficult to adjust. Hence, they switched to a flat version with four racetracks, which was compact and easier to adjust. Each racetrack required 13 BBs, making the total 52 at a cost of about $0.08. The user emphasized that ooze is their main enemy in this design, but they managed to print two great pieces in their first attempt. To ensure smooth rolling, they recommended checking if the BBs can roll around the entire track by simply tilting the part; any catch indicates further cleaning is needed. Once assembled with 4mm bolts and an 8mm rod, optionally with grease, the parts should hold the BBs in place, even when turned upside down.