Machine Design
Pitch point of a cam is

A point on the pitch curve having maximum pressure angle
A point on the pitch curve having minimum pressure angle
Any point on the pitch circle
Any point on the pitch curve

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Machine Design
Coaxing is the procedure of increasing

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

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