Design a helical extension spring to handle a dynamic load that varies from 60 lb to 75 lb over 0.5-in working deflection.

1.       Design a helical extension spring to handle a dynamic load that varies from 60 lb to 75 lb over 0.5-in working deflection. Use music wire and standard hooks. The forcing frequency is 1 200 rpm. Infinite life is desired. Minimize the package size.

2.       Choose appropriate safety factors against fatigue, yielding, and surging. Design a straight-ended helical torsion spring for a static load of 50 N-m at a deflection of 60° with a safety factor of 2. Specify all parameters necessary to manufacture the spring. State all assumptions.

find the cost of your paper

design suitable bearings to support the load for at least 5E8 cycles at 1 200 rpm using deepgroove ball bearings.

The shaft shown in Figure P11-4 was designed in Problem 10-19. For the data in row (a) of Table P11-1, and the corresponding diameter of shaft found in Problem 10-19,….

Find the minimum film thickness for a long bearing with the following data: 30-mm dia, 130 mm long, 0.0015 clearance ratio, 1 500 rpm, ISO VG 100 oil at 200°F, and supporting a load of 7 kN.

1.       A paper machine processes rolls of paper having a density of 984 kg/m3. The paper roll is 1.50-m OD X 22-cm ID X 3.23-m long and is on a simply supported, 22-cm OD, steel….

Find the minimum film thickness for a bearing with these data: 30-mm dia, 25 mm long, 0.0015 clearance ratio, 1 500 rpm, ON = 30, ISO VG 220 oil at 200°F.

1.       Problem 7-12 estimated the volume of adhesive wear to expect from a steel shaft of 40 mm dia rotating at 250 rpm for 10 years in a plain bronze….