What are the design features of a spur gear?

Question

Accepted Answer

Spur gears have straight teeth and are used to transmit power between parallel shafts.

Teeth are parallel to the axis of rotation
Teeth are straight and have a constant width
Pressure angle determines tooth shape and strength
Module or diametral pitch determines size of gear
Commonly used in machinery such as automobiles and industrial equipment

Accepted Answer

The spur gear is cylindrical and has straight teeth cut parallel to its rotational axis. The tooth size of spur gears is established by the diametrical pitch. Spur-gear design accommodates mostly rolling, rather than sliding, contact of the tooth surfaces and tooth contact occurs along a line parallel to the axis.

Asked in Cognizant

What are the design features of a spur gear?