The solution of a problem in multi-range of cylindrical cog-wheels is in the use of banded wheels. One of the significant problems of banded wheels consists in decrease of their accuracy at assemblage. In the paper there is considered the influence of torque oscillation at threaded joint tightening upon a bend of a ring gear, and finally upon its accuracy. In the paper it is shown that the application of mechanized (pneumatic) nut-runners results in: an increase of kinematic accuracy values and smoothness of operation of an assembled cog-wheel and lose of a ring gear not less than for one degree. In the paper the attention is drawn of manufacturers to the necessity of the application of more accurate automated nut-runners and to the certification of a ring gear not only after processing, but also after assembling.
cog-wheel, bolted connection, profile direction error.
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