Theory of Machine
Pitch point on a cam is

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

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Theory of Machine
Hammer blow

Is the maximum vertical unbalanced force caused by the mass added to balance the reciprocating masses
Is the maximum horizontal unbalanced force caused by the mass provided to balance the reciprocating masses.
Varies inversely with the square of the speed
Varies as the square root of the speed

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