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A system that drives a centrifugal pump with an electric motor transmits a 2,800 lb tangential...

A system that drives a centrifugal pump with an electric motor transmits a 2,800 lb tangential load between a pinion and its gear. The pinion and gear made with standard 25o , full-depth teeth are hobbed from an AISI 4140 nitrided steel. They are manufactured to a quality level of 9, and a reliability of 0.9 is required. The diametral pitch is 6, and the face width is 2.000 in. The 21 tooth pinion rotates at 1,800 rpm, and it meshes with a 33-tooth spur gear reducer. Conditions are such that Km = 1.7. Using the AGMA Equations to estimate the number of bending stress cycles that the gearset can withstand.

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