1.A helical-coil spring is to be wound using wire made from a proprietary ferrous alloy for which , , , , , and . It is desired to use the spring in a cyclic loading situation where the axial load on the spring during each cycle ranges from 450-N tension to 450-N compression. The spring…

1.A multileaf simply supported truck spring is to be designed for each rear wheel, using AISI 1095 steel ( , , ). The truck weight is 16 kN, with 65 percent of the weight on the rear wheels. The static midspan deflection is 100 mm and the maximum midspan deflection during operation is 200 mm.…

1. Preliminary design calculations have suggested that design objectives may be met by a straight spur gearset using standard full-depth 2 -pitch involute gear teeth, and a 21-tooth pinion meshing with a 28-tooth gear. A 25 pressure angle has been selected for this application, and the gear teeth are to be shaved to AGMA quality…

1.A straight-tooth one-stage spur gear reducer has been used in a high-production home appliance for many years. The gear pair constitutes about one-half the $50 production cost of the appliance. Consumer complaints about gear noise have grown over the years and sales are declining. One young engineer has found data that suggest the noise level…

1.A straight-tooth one-stage spur gear reducer has been used in a high-production home appliance for many years. The gear pair constitutes about one-half the $50 production cost of the appliance. Consumer complaints about gear noise have grown over the years and sales are declining. One young engineer has found data that suggest the noise level…

1. A straight-toothed full-depth involute spur pinion with a pitch diameter of 100 mm is mounted on an input shaft driven by an electric motor at 1725 rpm. The motor supplies a steady torque of 225 N-m. a. If the involute gear teeth have a pressure angle of 20, determine the transmitted force, the radial…

1. A 10-pitch 20 full-depth involute gearset with a face width of 1.25 inches is being proposed to provide a 2:1 speed reduction for a conveyor drive unit. The 18-tooth pinion is to be driven by a 15-hp, 1725-rpm electric motor operating steadily at full rated power. A very long life is desired for this…

1. Using the simplified approach (do not refine results by using AGMA equations), design a single-reduction straight spur gear unit to operate from a 5.0-hp electric motor running at 900 rpm to drive a rotating machine operating at 80 rpm. The motor is to operate steadily at full rated power. Near-infinite life is desired. A…

1. A 10-pitch 20 full-depth involute gearset, with and face width of 1.25 inches, is being proposed to provide a 2:1 speed reduction for a conveyor drive unit. The 18- tooth pinion is to be driven by a 15-hp, 1725-rpm electric motor operating steadily at full-rated power. A very long life is desired for this…

1.For the gearset specifications of  do the following: a. Using the AGMA refined approach, calculate the surface fatigue contact stress for the meshing gear teeth. b. If the proposed material for both gears is AISI 4620 steel, and the teeth are carburized and case hardened (not including the root fillet) to a hardness of approximately…