Understanding the function of bearing machine

A bearing is a machine element that restrains relative motion to only the preferred motion, and reduces abrasion between moving parts. The design of the bearing may, for instance, provide for liberated linear movement of the moving part or for free rotary motion around a fixed axis; or, it may prevent a motion by calculating the vectors of normal forces that put up with the moving parts. Many bearings also ease the preferred motion as much as possible, such as by reducing friction. Bearings are classified largely as per the type of operation, the motions permissible, or to the directions of the loads applied to the parts.

Bearing is crucial for numerous equipment, tools and vehicles. From a bicycle to a rubber crusher, almost all machines require bearings for its smooth functioning. There are various types of bearings available in the market.  Here is the list of the bearings that you can buy for your machines:


There are at least 6 common types of bearing, each of which works on different principles:

  • Plain bearings- it is also known by the specific styles: sleeve bearing, bushing, journal bearing, and rifle bearing.
  • Rolling-element bearing such as roller bearings or ball bearings.
  • Jewel bearing, in which the freight is carried by rolling the pin slightly off-center
  • Fluid bearing, in which the weight is carried by a gas or liquid
  • Magnetic bearing, in which the load is carried out by a magnetic field.
  • Flexure bearing, in which the motion is hold by a load element which bends.


Common motions allowed by bearings are:

  • axial rotation e.g. shaft rotation
  • hinge motion e.g. door, elbow, knee
  • linear motion e.g. drawer
  • spherical rotation e.g. ball and socket joint

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