Nylon gear, worm gear has the advantage of light weight, resistance to fatigue, absorption of shock, good self-lubricating properties. For fear of the lubricant contamination or cannot add lubricant, often with MC nylon gear is the most appropriate, and not hurt a good corresponding gear or online, the noise is small, in the textile, paper making, printing, food machinery and so on various industrial application effect is remarkable, the noise is only 1/4-1/2 steel parts.