ABSTRACT
Accuracy of gear teeth is an important consideration when designing and manufacturing gears. Perfect gears for parallel-axes gear pairs are shaped in a form of a screw involute surface, G. The screw involute surface is reduced to a surface of an involute cylinder in the case of spur gears. A conventional method of inspection of the accuracy of the involute gear tooth profile is based on the kinematical properties of the involute of a circle. The practice of the inspection of gears for intersected-axes gear pairs is inconsistent. Mounting distance in gears for intersected-axes and crossed-axes gear pairs is a design parameter that is inconvenient for inspection. The base cone apex of the gear does not exist physically. This is the root cause of inconveniences when inspecting the accuracy of the mounting distance.
