Print in Place Roller Bearing

50x20x10 Roller Bearing with roller cage

The roller geometry allows it to be loaded axially to a certain level. Tolerances between the rings and the roller is available in 0.15 mm and 0.1 mm. 

Printing:

• Print orientation: print it on the Roller Side
• Material: for engineering purposes i would suggest PETG
• Nozzle: 0.4 mm
• Supports: No supports 
• Layer height: 0.2 mm works fine
• Perimeters: at least 2, add more depending on your workload
• Seams: Random!
• Infill: Triangles, 15% or more
• Top/Bottom fill pattern: concentric

Advice:

It may not run well in the beginning, try to put some force on it or just give it time while in use. The seam “bumps” need to be pressed in to flatten them, this will happen in time. 

To improve smoothness you can add hard oil, silicon or some other lubricant. 

In case one of the rollers does not roll, the problem usually is the first layer due to calibration. Check the bottom to see any areas where the roller fused together with the cage. If so, carefully cut it free with a thin knife.

If you want to install the bearing into a bearing housing or onto a shaft, the experience is that a tolerance of ±0.05mm is easily installable and provides a tight fit. So, the bearing housing should have a diameter of 50.05mm, and the shaft should be 19.95mm.

I hope it will be useful in your project!