Machine Design
The function of a washer is to

Provide bearing area
Provide smooth surface in place of rough surface
Absorb shocks and vibrations
Provide cushioning effect

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Machine Design
The plasticity is the property of a material which enables it to

Regain its original shape after deformation when the external forces are removed
Retain deformation produced under load permanently
Resist fracture due to high impact loads
Draw into wires by the application of a tensile force

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Machine Design
In oilness bearings

The oil film is maintained by supplying oil under pressure
Do not require external supply of lubricant
The oil film pressure is generated only by the rotation of the journal
Grease required to be applied after some intervals

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