There are two main types of bearings but many variants and combinations of types, too many to list individually:
Ball bearings are the most common type of bearing used in many products, designed to handle higher speeds and lighter loads, thrust and radial loads.
Roller bearings use a cylindrical rolling-element to ensure and maintain separation between the moving parts. The roller bearing reduces rotational friction while supporting radial and axial loads.
- Cylindrical – designed for higher loads and slower speeds. The cylindrical bearing is used with ball bearings to support the axial load.
- Taper – the taper bearing can withstand combined axial and radial loads.
- Spherical – spherical roller bearings permit rotation with low friction alongside angular misalignment. This bearing can withstand higher loads and lower speed limits. The inner ring may be misaligned with the outer ring enabling these bearings to support a rotating shaft.
- Needle roller – For slower speed and higher load where space limitations may be important.
- Plain bearings – No moving elements, where a special material is used to reduce friction on the rotating or sliding surface, commonly in the form of a bush or plate.