What is bearing

 Definition of bearing

Bearing is defined as the machine part which support a moving elements and guide its motion while preventing the motion in the direction of load

Drawback in bearing

There are two drawbacks in bearing power loss due to friction between the surfaces

To overcome or reduce the drawback lubricant is used

Function of lubricant

1 .    reduce friction hence reduce power loss and heat              generation.

2.     Reduced ware waiting services. 

3.     Prevent corrosion by preventing oxidation of                      material

Material of bearing

1 high temperature performance

2 load carrying capacity should be high

3 fatigue strength should be high

Material For sliding contact bearing

Babbitt material tin besed bronze based

Material for rolling contact bearing

Hardened Steel carbon Chrome Steel

Classification of bearing

(A)  sliding contact bearing

These are of two types

1.sleeve type 

Sliding occurs on curved surface

1. Thrust bearing

Force occurs in axial direction

 

2 radial bearing

 Force occurs in radial direction

  These are of two types 

 1 hydrodynamic bearing

 2 hydrostatic bearing

 2. Slipper type

     Sliding occurs on straight line

(A) ROLLING CONTACT BEARING

  (a) ball bearing

   1 . Deep groove ball bearing

   2. angular contact ball bearing

   3 .  Self aligning  ball bearing

   4 . Thrust ball bearing

  

(B) ROLLER BEARING

    1 taper roller bearing 

    2  niddle  roller bearing

    

Some photos of bearing given below