## Find the pitch diameter, addendum, dedendum, outside diameter, normal, transverse, and axial pitch.

1.       A 20°-pressure-angle, 30°-helix-angle, 27-tooth helical gear has a diametral pitch pd = 5. Find the pitch diameter, addendum, dedendum, outside diameter, normal, transverse, and axial pitch.

2.       A 25°-pressure-angle, 20°-helix-angle, 43-tooth helical gear has a diametral pitch pd = 8. Find the pitch diameter, addendum, dedendum, outside diameter, normal, transverse, and axial pitch.

3.       A 57-tooth, 10°-helix-angle, helical gear is in mesh with a 23-tooth pinion. The pd = 6 and φ = 25°. Find the transverse and axial contact ratios.

4.       A 78-tooth, 30°-helix-angle, helical gear is in mesh with a 27-tooth pinion. The pd = 6 and φ = 20°. Find the transverse and axial contact ratios.

### 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….