Bearing types at a glance
Ball Bearings use balls as rolling elements. They are characterised by point contact between the balls and the raceways. As a rule, ball bearings can rotate very quickly but cannot support substantial loads.
In addition to radial forces, they absorb axial forces in both directions. Their low torque 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 problems arise with the alignment of the shaft and the housing (misalignment) and the shaft could deflect. Self-aligning ball bearings are primarily suitable for absorbing radial forces. >>
Thrust ball bearings were developed solely for absorbing axial forces in one direction, which means that they can locate the shaft axially in one direction. >>
Roller Bearings are characterised by line contact. This type of contact means that roller bearings have a 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 can absorb 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 fitted 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 a constriction, needle bearings can be a good solution. >>
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