A standard 25-HP electric motor operates at 1800-RPM. If the motor is connected to a pump in the configuration below. The left end of the shaft is the motor shaft and has a diameter d₂ = 1.25". The right end of the shaft is the pump shaft and has a diameter d₁ = .875" with a transitional root radius between the two diameters of r = .05". The shaft is solid, COLD WORKED, stainless steel. Determine the torque carried by the shaft.

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Torsion

In mechanical engineering, torque, torsion, and twisting moment are three of the most important concepts which have different meanings. Torque is the consequence of a moment of a force that produces an angular acceleration in a body or induces rotational kinetic energy in a body. For instance, in an automobile, the power transmission shaft is a body that is always under rotation due to the external torque acting on it, this torque is created by the engine.