Investigation results are cited in the field of developing super-light gearmotors based on high-torque motors, eccentric single-stage gear transmissions of planetary type with gear ratios between 80 and 120. These include the gears of aluminum alloys with working surfaces coated by micro-arc oxidation. Peculiarities of their design are presented as well as computation of geometrical parameters of the main elements, material choice and hardening techniques exerting most favorable effect on the lifetime and output-input ratio of the drive.

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