Strength rating of bevel gears according to standards such as ISO, AGMA, etc. is executed based on virtual cylindrical gears, only modified by a few specific bevel gear factors. The rating methods of these standards also include the calculation of permissible stresses and finally result in safety factors.
Lately, the use of asymmetric gears in automotive and other applications is an upcoming trend, though few applications
are known to have asymmetric teeth. However, an increased interest in asymmetric gears can be seen. Many companies have started to design and test such applications.