Machine Design
Form coefficient of spring is

Concerned with strength of wire of spring
Ratio of coil diameter to wire diameter
Its capability of storing energy
Load required to produce unit deflection

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Machine Design
In hydrodynamic bearings

Do not require external supply of lubricant
The oil film pressure is generated only by the rotation of the journal
The oil film is maintained by supplying oil under pressure
Grease is used for lubrication

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