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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