Questions & Answers of Gears

Question No. 59

A 20º full depth involute spur pinion of 4mm module and 21 teeth is to transmit 15 kW at 960 rpm. Its face width is 25 mm.

The tangential force transmitted (in N) is

Question No. 60

A 20º full depth involute spur pinion of 4mm module and 21 teeth is to transmit 15 kW at 960 rpm. Its face width is 25 mm.

Given that the tooth geometry factor is 0.32 and the combined effect of dynamic load and allied in factors intensifying the stress is 1.5; the minimum allowable stress (in MPa) for the gear material is

Question No. 42

A spur gear has a module of 3 mm, number of teeth 16, a face width of 36 mm and a pressure angle of 20°. It is transmitting a power of 3 kW at 20 rev/s. Taking a velocity factor of 1.5, and a form factor of 0.3, the stress in the gear tooth is about