Evaluate the shaft diameter on strength basis, Mechanical Engineering

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The layout of a transmission shaft carrying two pulley C and B and supported on bearings A and D is shown in figure. Power is supplied to the shaft by means of vertical belt on pulley B, that is then forced to pulley C carrying a horizontal belt. The maximum tension in belt on pulley B is 2.5 KN. The angle of wrap for both the pulleys is 180o and the coefficient of friction force is 0.24. The shaft is made of plain carbon steel 30C8 (Syt=400 N/m2) and the factor of safety is 3. Evaluate the shaft diameter on strength basis.


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