A UNS G10350 steel shaft, heat-treated to a minimum yield strength of 75 kpsi, has a diameter of 1- in. The shaft rotates at 613 rev/min and transmits 53 hp through a gear. Select an appropriate key for the gear. (a) Take a in square key, UNS G10200 cold-drawn steel being used. The design will be based on a yield strength of 65 kpsi. A factor of safety of 2.80 will be employed in the absence of exact information about the nature of the load. (b) The same conditions in option (a) but the design will be based on a shear strength of 37.5 kpsi Use Customary units.

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