Friction is enemy of your moving parts. Bearings make rotating movement nearly frictionless.
This bearing is a thrust bearing. It can take a small load radially – it does not make a great car wheel. It can take a large force along the axis (the axle running through the center). This means it is great for a lazy susan
This bearing is sealed to keep grit out of the ball bearings inside the housing.
This bearing has a flange, which will help keep the bearing where you put it. Two flanged bearings held from opposite direction on the same screw will stay where you put them for a very long time.
I recommend a pair of bearings on either side of the thing you want to rotate, then use a clamping force to hold them together. See the Pan/Tilt robot for an example of our bearings in use.
- inner diameter: 35mm
- outer diameter: 52mm
- thickness: 12mm