A hydraulic press has one cylinder with a diameter of 150 mm and another of 125 mm. What force is required on the smaller cylinder to allow the larger piston to exert a force of 25 kN.

4. A small race car has an aluminum hub (shown in red). The drive axle is press-fit into the hub, resulting in compressive pressure and torsional friction as shown below when the wheel is powered. Assuming a coefficient of static friction of 0.3 and a shear yield strength of 30 ksi for the shaft, determine the maximum allowed contact pressure, p (in psi). In other words, how much contact pressure (and resulting torque) would cause yielding of the shaft? Given: d=0.75in, w=1.5in f: Friction force per unit area p: Normal force per unit area

Explain properly and also show the plotted variation, last answer was not showing anything at all

A clamp coupling is to transmit a power of 13 kW to a shaft rotating at a speed of 511 rpm. Calculate the diameter of the shaft if the allowable shear stress on the shaft is 45 MPa. The number of bolts connecting the two halves is six. The permissible tensile stress for the bolts is 76 MPa. The coefficient of friction between the coupling and the shaft surface may be taken as 0.3. Also, find the diameter of the bolt. Torque in Nm Diameter of shaft in mm Diameter of bolt in mm