Due to the wide use of chain drive, manufacturers and users of quality problems often occur on the friction, how to determine its quality problems is the key to solve the problem, therefore, this paper analyzed and discussed the chain drive for common issues that arise during use, and presented its solutions for each chain manufacturers and users reference. First, the chain drive any reasonable lubrication maintenance chain drive, require proper lubrication. Chain wear, fatigue, sprocket wear, corrosion, links are not flexible or hinge tightening and lubrication are dead, and if the chain wear faster, pin color, is not running smoothly, indicating insufficient lubrication of the chain. Under normal circumstances, the lubricant is recommended as follows: temperature 200 -400C using the 20th Oil, 400-1000C using the 30th Oil, 1000- 1200C using 40 oil, 1200- 1400C using No. 50 oil. Lubrication can be handmade. Brush or oiler lubrication. Environment needs to have a chain case oil can also be shallow or drip lubrication. If the operating temperature exceeds 3000C can not use oil lubrication, can be spread using colloidal graphite carbon tetrachloride or white kerosene solution more effective. Second, parallelism and sprocket chain drive failure and exclusion methods 1. coplanarity of front and rear axles for wear life in terms of performance depends on the chain and sprockets front and rear axles are correctly installed in large part. Its requirements are: anterior-posterior axis of parallelism within 1/300. Front and rear wheels of coplanarity in 0.5-1.0mm / m. If the chain was found during operation, said the problem should be adjusted. 2. The chain tension the chain tension and slack side of the chain sag distance. Horizontal and tilt adjustable center distance transmission, the sag of the chain loose side should be the center distance of 2% left stone. Vertical centerline of the drive or subject to shock loads, reverse gear should be more tension the chain. 3. If the chain and sprocket with the chain and sprocket with the bad, probably hinge wear chain pitch elongation hopout phenomenon if the chain should be replaced. If the sprocket wear should be replaced, in order to avoid damage to the new chain. 4. Chain jitter jitter because the chain is too loose chain, the load is too large or have one or more links not flexible. The solution is to install a chain tensioner or adjustable center distance. Possible to reduce the load. Operating noise is too large to produce excessive noise reasons 5. sprocket chain is not coplanar; chain tension is too big or too small; insufficient lubrication; chain and sprocket wear; or oversized chain pitch. The solution is: Check the front and rear axle parallel to the sprocket coplanarity situation be corrected. Center distance adjustment and tensioning device, so that proper tightness and ensure lubrication to the workpiece. 6. chain plate side surface wear inner wear if the chain link plates serious and that is not aligned drive. The solution is to check the alignment of the shaft and sprocket. If the installation is no problem, considerable during operation to check whether the load is too large due to deformation caused by insufficient rigidity. 7. chain plate fatigue than when the load is too large chain plate fatigue limit, chain plates on the fatigue failure occurs, produce tiny cracks around the hole until it breaks. The solution is to reduce the load carrying capacity or replace the chain. 8. pin wear usually wear a pin is caused due to insufficient lubrication. Whether there should always check the oil lubrication Wan abrasive or change style. 9. pin glued pin glued generally caused by lack of oil supply. If only one end of the glued it to check the installation of the shaft and sprocket shaft is parallel to the sprocket is coplanar axis during operation and sprockets is ran. 10. sprocket wear if both sides have significant wear sprocket drive alignment is bad. If you have a "curved ditch" excessive wear and tear should be reversed, said sprocket wheel can also be installed to allow the anti-wear lighter side toward the chain. Excessive wear of the sprocket and chain together the best replacement. More than ten is a problem in the chain drive process often encountered. If the above problems figuring out, for the chain manufacturer and use beneficial for both manufacturers can reduce the use of manufacturers and manufacturers of disputes, so that two co-operative. 1879 Mr. Hans Renold invented the world's first bush roller chain, an industry was born. In the same year, Mr. Renold established in Manchester, England Renold company, mainly engaged in various chain design, production and sales. Since then, the company has been a Renold chain drive industry pioneer, has led the development of a number of international and national standards. After 100 years of accumulation, development and improvement of the current Renold has developed into a professional power transmission and precision engineering multinational companies. Renold production bases throughout the United Kingdom, France, Germany, the United States, with sales companies in 23 countries, is a network of agents and distributors in over 60 countries around the world, to become a global leader in the field of chain drive. The major products of chains, gears, couplings and clutches, etc., are widely used in many industries power plants, metallurgy, petroleum, automobile, cement, food, packaging, etc., in which the chain products accounted for 70% of the whole group sales, is Renold advantage products. 

keywords: St. Ling, Ling St. electromechanical, LSPTC, chain, Renold (Renold) chain,