Ball Bearings utilize balls as the rolling elements. They are characterised by point contact between the balls and the raceways. As a rule, ball bearings rotate very quickly but cannot support substantial loads.
In addition to radial forces, they absorb axial forces in both directions. Their low torque also makes them suitable for high speeds. >>
Angular-contact ball bearings are therefore suitable for combined loads, where high axial forces have to be transferred in addition to radial forces. >>
This type of bearing is recommended when alignment of the shaft and the housing (misalignment) are a problem and the shaft could deflect. Self-aligning ball bearings are most suitable for absorbing radial forces. >>
Thrust ball bearings were developed solely for absorbing axial forces in one direction, meaning they can locate the shaft axially in one direction. >>
Roller Bearings are characterized by line contact. Line contact offers higher load rating than ball bearings of the same size; however the speed ability is lower than a ball bearing due to the increased friction of a contact line.
Spherical roller bearings are suitable for absorbing high radial loads and moderate axial loads. >>
Depending on the design, they may also be able to transmit limited amounts of axial loads. >>
Due to the contact angle, tapered roller bearings can absorb high radial and axial forces in one direction.
Tapered roller bearings are often combined in pairs to support axial forces in both directions. >>
Needle roller bearings have a high load rating and are only suitable for radial forces.
If space is constricted, needle bearings can be a good solution. >>