Shaft Design & Strength

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What are mechanical shafts?

A mechanical shaft is a rotating member usually of circular cross-section either solid or hollow, which transmits power and rotational motion.

Machine elements such as gears, pulleys, flywheels, clutches and sprockets are mounted on various types of shafts and are used to transmit power from the driving device such as motor or engine. Vehicle crankshaft is a prime example of mechanical shaft as shown in figure 1.

Figure 1. shaft-design (


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