Machine Design
The buckling load will be maximum for a column, if

Both ends of the column are hinged
One end of the column is hinged and the other end is free
Both ends of the column are clamped
One end of the column is clamped and the other end is free

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Machine Design
In hydrostatic bearings

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
Do not require external supply of lubricant

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