Aerospace Instrument-Making Annotation << Back Gears for aviation Pakhomov S.N. The results of computer studies involute helical gear carried by the novel process. On the basis of these studies concluded that the transfer of involute cylindrical gears do not implement constant gear ratio, creating their profiles kinematic error for the total turnover of the output wheel. The method allows the construction of a new engagement. Possible ways extend to the source of information for cutting teeth on CNC machines. The teeth may be cut as for spur gears, external and internal gears and bevel gears for. This allows you to develop promising precessing transmission. The article concludes: 1. A new way to create a cylindrical gears with any conjugate tooth profiles. 2 .The method is implemented using three-dimensional modeling software and CNC machines, for which the initial information are computer models . 3 .The method can be used as a tool to control the constancy of any cylindrical gear ratio transmission. 4 .With the proposed method has been proven that involute engagement does not implement constant gear ratio for turnover gear. 5 .Method of designing cylindrical gear new method can be extended to bevel gears, including internal gearing. 6. With the new method can be implemented more advanced manufacturing tech-nology perspective precessing gears that when gear ratios from 30 to 1700 are min-imum dimensions. They overlap factor reaches values from 2 to 13, they transmit high torque with minimum backlash and efficiency of 0,97…0,99. Key words: involute gear, conjugate profile, running method, the envelope curve, poluobkatnaya trans-mission, transmission precessing. Contacts: mniti@mniti.ru Pp. 47-56.