ABSTRACT
This chapter deals with perfect and almost perfect gear pairs. Manufacture of gears for perfect and almost perfect gear pairs is almost the same as that for conventional gear pairs. Finishing gear and mating pinion tooth flanks is the only principal feature in production of gears for perfect and almost perfect gearings different from that for conventional gearings. In order to develop a crossed-axes gearing with the desirable properties, the kinematics of C a-gearing is thoroughly investigated. It is shown that the tooth flanks of the gear and mating pinion can be generated as loci of the desirable line of their contact considered in corresponding reference systems associated with the gear and pinion. The conjugate tooth flanks of a gear and mating pinion in a crossed-axes gear pair are in line contact with one another. As the gears rotate, the line of contact travels with respect to several reference systems associated with: the gear, the pinion, and the housing.
