Machine Design
The flank of the tooth is the

Width of the tooth measured along the pitch circle
Surface of the tooth above the pitch surface
Surface of the top of the tooth
Surface of the tooth below the pitch surface

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Machine Design
In hydrostatic bearings

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

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Machine Design
A woodruff key is

Fitted in pairs at right angles
All of these
Capable of tilting in a recess milled out in the shaft
A tapered key with head at one end

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