1.       A 90° straight-bevel gearset is needed to give a 9:1 reduction. Determine the pitch cone angles, pitch diameters, and gear forces if the 25°-pressure-angle pinion has 14 teeth of p= 6, and the transmitted power is 746 W at 1 000 pinion rpm.

2.       A 90° straight-bevel gearset is needed to give a 4.5:1 reduction. Determine the pitch cone angles, pitch diameters, and gear forces if the 20°-pressure-angle pinion has 18 teeth of pd = 5, and the transmitted power is 7 460 W at 800 pinion rpm.

3.       A 90° spiral-bevel gearset is needed to give a 5:1 reduction. Determine the pitch cone angles, pitch diameters, and gear forces if the 20°-pressure-angle pinion has 16 teeth of pd = 7, and the transmitted power is 3 hp at 600 pinion rpm.