Smooth 608 Bearing (4.5mm balls)

Most 3D printed bearings are fully 3D printed - makes it convenient, but not really good for more precise applications.

The main problem with 3D printed bearings is that the parts often have seams, that can cause binds with the balls inside, and for printability they need tolerances of up to 0.4mm between the parts. That will cause some wiggle - which is fine for some applications but you sometimes just need more precision

I wanted a mostly 3D printed bearing that has virtually no wiggle and no seams in the important spots - guaranteeing smooth operation.

I decided to use 4,5mm steel balls that are used in air guns.

You print these parts:
- InnerRingVaseMode
- OuterRingVaseMode
With these settings:
- 0.4mm wall thickness
- 30mm/s wall speed
- Spiral/Vase mode
- 0 bottom and top walls

The settings for the rest of the parts do not really matter, I personally like using scarf joint seam.

You should use some kind of oil on the bearings to reduce wear on the plastic and make their movement even smoother.