In a new video, YouTuber Robert Murray-Smith shows how a robust crossed roller bearing can be created using 3D printing. The model is available for free on the online portal Thingiverse and, according to the maker, is suitable for a variety of technical applications, including turntables, wind turbines, motors and gearboxes.
In contrast to conventional ball bearings, the design presented uses cylindrical rollers, which are easier to print. While balls usually require complex support structures, cylinders can be produced with significantly less post-processing. The bearing geometry is based on two identically shaped rings with an integrated raceway, a cage to guide the rollers and the actual cylinder bodies. The arrangement of the rollers at 45-degree angles enables axial, radial and combined loads to be supported.
The model was developed entirely in Tinkercad. The rotationally symmetrical basic shapes are created by using the SVG revolution tool, which extrudes a flat 2D profile around an axis. The cage contains evenly distributed mounts for the rollers, which are designed to snap into place through precise positioning and targeted clearances. This design ensures reliable function even with different printer tolerances.
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