The lead screw (also called a power screw or a jack screw) is used to convert the rotation of a motor shaft into a translational motion of the mass m (see Figure P3.27). For one revolution of the screw, the mass translates a distance L (called the screw lead). As felt on the motor shaft, the translating mass appears as an equivalent inertia. Use kinetic energy equivalence to derive an expression for the equivalent inertia. Let Is be the inertia of the screw. Figure Can't Copy | Numerade

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SOLVED:Design a manual screw jack similar to that shown in Figure 15-4 for a 20-ton lift capacity and a 10-cm lift stroke. Assume that the operator can apply a 400-N force at the tip of its bar handle to turn either the screw or nut depending on your design. Design the cylindrical bar handle to fail in bending at the design load before the jack screw fails, so that one cannot lift an overload and fail the screw. Use rolling-clement thrust bearings. Seck a safety factor of 3 for thread or column