A Study for the Development of Plastic Worm Gears : Plastic Worm Gears filled with Fiber and Solid Lubricant

Abstract

Worm gears, which undergo a great deal of sliding, produce a large amount of heat and suffer from a high degree of wear, being low in resistance to heat and wear. However, plastic worm gears are currently demanded for use in food processing machinery which should be free of oil that can get into products. In the hope of developing practical worm gears from composite plastic material filled with fiber and solid lubricants, worm gears made of such plastics are produced, and tests are carried out to determine the degree of wear, coefficient of friction, surface roughness and changes in temperature.