+1 vote
in Machine Dynamics by (34.3k points)
If the stroke punch is 100mm, find the radius of the crank in mm.

(a) 200

(b) 100

(c) 50

(d) 400

This question was posed to me in an internship interview.

This intriguing question originated from Flywheel in a Punching Press in chapter Turning Moment Diagrams and Flywheel of Machine Dynamics

1 Answer

0 votes
by (38.6k points)
The correct choice is (c) 50

Explanation: Stroke punch is the distance travelled from top to bottom at the time of punching. Hence is equal to the diameter of the crank. Now s=100mm therefore r=s/2mm.

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