Machine Design
In hydrodynamic bearings

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

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Machine Design
Coaxing is the procedure of increasing

Metal resistance to corrosion by coating
Metal hardness by surface treatment
Fatigue limit by over-stressing the metal by successively increasing loadings
Metal strength by cycling

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