Machine Design
In oilness bearings

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

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Machine Design
Tapered roller bearings can take

Both radial and axial loads and the ratio of these being less than unity
Axial load only
Radial load only
Both radial and axial loads and the ratio of these being greater than unity

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