Solved: A punch-press geared 10:1 is to make six punches

Chapter 16, Problem 16-29

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A punch-press geared 10:1 is to make six punches per minute under circumstances where the torque on the crankshaft is \(1300 \mathrm{lbf} \cdot \mathrm{ft}\) for \(\frac{1}{2} \mathrm{~s}\). The motor's nameplate reads 3 bhp at 1125 rev/min for continuous duty. Design a satisfactory flywheel for use on the motor shaft to the extent of specifying material and rim inside and outside diameters as well as its width. As you prepare your specifications, note \(\omega_{\max }, \omega_{\min }\), the coefficient of speed fluctuation \(C_s\), energy transfer, and peak power that the flywheel transmits to the punch-press. Note power and shock conditions imposed on the gear train because the flywheel is on the motor shaft.