Ball-bearings are very popular for 3d-printing. However they often fail for real applications. Using Fusion 360 I've created a parametric design of a "Crossed Roller Slew Bearing". The result is a pretty accurate and robust bearing. The bearing including the rollers is 3d-printed in separate parts. There are a few screws needed to clamp the two halves of the inner race together.
The design process is really straightforward, so I've created a video tutorial how to design this slew bearing in Fusion 360. With some practice, such a bearing can be designed from scratch in less than 20 minutes. For students interested in 3d-Design, I recommend to install Fusion 360 and walk through the tutorial.
The 3d-files available for downloading are a large version with 48 rolls, and a small version with only 10 rolls (top and bottom halves of the race are actually symmetrical, but for completeness both are available as STL).
If you need a bearing with other dimensions, the CAD-files of Fusion 360 are available for download. There are actually two different designs: a basic version with cylindrical rollers, and a more sophisticated version with conic rollers. The CAD-files are also available here:
| SB08_48_Inner_Race_Bottom.stl | 1.3MB | |
| SB08_48_Inner_Race_Top.stl | 1.3MB | |
| SB08_48_Outer_Race.stl | 2.5MB | |
| SB08_48_Rolls.stl | 5.9MB | |
| SB08_xx_Roll.stl | 125.3KB | |
| SBC08_10_Race_Inner.stl | 829.6KB | |
| SBC08_10_Race_Outer_Bottom.stl | 879.3KB | |
| SBC08_10_Race_Outer_Top.stl | 879.3KB | |
| SBC08_10_Roll.stl | 118.2KB | |
| SBC08_10_Rolls.stl | 1.2MB | |
| Slew_Bearing.f3d | 241.5KB | |
| Slew_Bearing.step | 311.9KB | |
| Slew_Bearing_Conic.f3d | 286.8KB | |
| Slew_Bearing_Conic.step | 240.7KB |
