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Bearings


Common motions permitted by bearings are:
Axial rotation e.g. shaft rotation
Linear motion e.g. Carriage over the bed, drawer in the table
spherical rotation e.g. ball and socket joint
Hinge motion e.g. door

Bearing Loads 


      Radial Load
      ThrustLoad
      Combination of both.


Some type of bearing 

Plain bearings-Sleeve Bearing

Advantages :

It takes up less space.
It has a rigid construction
It will carry loads more effectively
It is suitable for larger diameter shafts
It is cheap to manufacture and cost less.
They operate more silently.
They have good shock load capacity.

Disadvantages:

It has higher  frictional resistance
It is more difficult to lubricate
There are limited choice of designs available 
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