Machine Design
The process which improves the machinability of steels, but lowers the hardness and tensile strength is

Spheroidising
Full annealing
Normalising
Process annealing

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Machine Design
In oilness bearings

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

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