The profile shifted teeth lack the weak undercut section ... They are also reportedly stronger than either spiral or bevel gears. Figure 1.7.1: Straight tooth bevel gear with 45 degree angled teeth.

any deviations from design specifications can introduce errors in the tooth profile, pitch, or thickness that affects backlash. Backlash in bevel gears can be measured in several ways, such as ...

However, bevel gears need to have some clearance or backlash between their teeth to avoid excessive friction, noise, and wear. Backlash is the amount of free movement or play between the mating ...