Abstract
We measured the efficiency and the noise of the plastic worm gear drives with the module 0.5 mm and the lead angle 5- 8 degrees. The worm and the worm wheel of the drives are made of a polyacetal (POM) and a brass (C3604), respectively. As the result of the experiments, it was found that the lubrication with a grease increases the efficiency more than 10 percents, and the worm gear with the lead angle 8 degree provides 10 percents higher efficiency than that with the lead angle 5 degree. Also, the noise in operating increases proportionally with the rotational speed of the worm, and is hardly influenced by an applied torque.
