Theory of Machine
An involute pinion and gear are in mesh. If both have the same size of addendum, then there will be an interference between the

Tip of the gear tooth and flank of pinion
Tip of the pinion and flank of gear
Flanks of both gear and pinion
Tip of both gear and pinion

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Theory of Machine
Hammer blow

Varies as the square root of the speed
Varies inversely with the square of the speed
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.

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