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Polymer gears are used in power transmission due to its several merits. The noise and vibrations are key parameters in performance testing in any gear box which play vital role in automobile. The good damping and self lubrication property of Nylon 66 gear reduce noise and vibrations to great extent. An attempt has been made in this regard by experimentation to evaluate noise and vibrations occurred in gear box of moped by using Nylon 66 helical gear as replacement to metal gear. This paper presents experimentally the noise and vibrations generated during power transmission both in metallic and non metallic gear in the gear box of moped, and compares between them. The results obtained by plotting characteristics for both noise and vibrations generated become benchmark and one step to find the feasibility of replacement of gear box in small and light vehicles. Keywords—Gear; Nylon66, noise, speed, vibrations.

Experimental Investigation of Noise and Vibrations in Nylon66 Plastic Helical Gear Used in Automobile Application