## Design a planetary gear train similar to that shown in Figure 12-16 for an overall velocity ratio of exactly 1.25 if the sun gear is stationary, the arm is the input, and the ring gear is the output.

1.       The pinion of an internal gearset has pitch radius rp = 30 mm and the gear has pitch radius r= 150 mm. If the pinion is the input member of the set, determine the velocity ratio, the torque ratio, and the gear ratio of the set.

2.       A pinion having 18 teeth and a diametral pitch of 10 (in-1) is in mesh with a rack. If the rack moves 1 in, how many degrees will the pinion rotate?

3.       A gearset with 25°, full-depth teeth is designed to have a pinion with 24 teeth, a gear with 54 teeth, and a diametral pitch of 6. Compare the contact ratio for this set for a range of center distances from 0.90C to 1.10C.

4.       Design a planetary gear train similar to that shown in Figure 12-16 for an overall velocity ratio of exactly 1.25 if the sun gear is stationary, the arm is the input, and the ring gear is the output. Specify tooth numbers for each gear in the train.

### 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….