Machine Design
Pitch point of a cam is

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

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Machine Design
Set screws are

Similar to stud
Slotted for a screw driver and generally used with a nut
Similar to small size tap bolts except that a greater variety of shapes of heads are available
Used to prevent relative motion between parts

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