Female Speaker: Gears transfer power bevel gears are used when the power of one shaft must be transmitted at a different angle to another shaft often at a right angle. The most common example of bevel gears at work is an automobile differential. With the drive shaft of the motor must transfer its power at a right angle to be axle the wheels. The bevel gears in example here have the same diameter and the same number of teeth so they will each turn at the same rate.