Abstract
This paper describes the heat generation and power transmission efficiency of plastic helical wheel meshed with steel worm. The test machine for plastic worm gears was newly developed, in which the center distance and shaft angle are variable and the transmission efficiency can be measured. Experiments were carried out using plastic helical or worm wheel and steel worms under various running conditions. The temperatures of plastic helical and worm wheels and the torques of the input and output shaft were measured. The effects of torques and rotational speeds on the gear teeth temperatures and the transmission efficiencies between meshing gear teeth were determined.
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