Bevel gears are useful when the direction of a shaft’s rotation must be changed. They are usually mounted on shafts that are 90 degrees aside, but can be designed to work at other angles as well.

One’s teeth on bevel gears can be direct, spiral or hypoid. Right bevel gear teeth already have the same problem as straight spur equipment teeth — as each tooth engages, it impacts the corresponding tooth all at once.

Exactly like with spur gears, the answer to this problem is to curve the gear teeth. These spiral teeth engage just like helical tooth: the contact begins at one end of the gear and progressively spreads over the whole tooth.

On straight and spiral bevel gears, the shafts should be perpendicular to each other, but they must also maintain the same plane. If you were to lengthen the two shafts past the gears, they might intersect. The hypoid equipment, on the other hand, can build relationships the axes in various planes.

Hypoid bevel gears in a car differential

This feature can be used in many car differentials. The band equipment of the differential and the insight Super Power Lock pinion equipment are both hypoid. This allows the insight pinion to be mounted less than the axis of the ring gear. Figure 7 displays the insight pinion engaging the ring gear of the differential. Since the driveshaft of the automobile is linked to the insight pinion, this also lowers the driveshaft. This implies that the driveshaft doesn’t intrude in to the passenger compartment of the car as much, making more room for people and cargo.