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Estimate the shaft diameter required to produce a critical speed of rotation of 250 rpm for an aluminum shaft of total length of 1.0

Estimate the shaft diameter required to produce a critical speed of rotation of 250 rpm for an aluminum shaft of total length of 1.0 m that carries a center load of 40 kg as shown in Figure 2. 500 mm 40 kg Figure 2 Aluminum shaft 500 mm

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