Henan Fote was devoted in the research and manufacturing of various grinding machines, such as thesand grinder, the SCM super micro mill, the 4R Raymond mill, which are all quite common in grinding sites. Nowadays, Fote machines are not only limited inside China, but also expand a new market abroad. We affirm the successful application of Fote grinders in this project can show more people our good reputations and high qualities.It is inevitable the grinder mill may generate a big noise while working at the production site. However, if there is too much noise for local residents to endure, it could cause a collision and affect the normal production of the crushing plant. So it is always a priority for the technicians of Fote to study how to relief the noise generated by the grinder mill during normal production. Why does the grinder machine generate noise during production. The main reasons for that is probably the unbalanced pulley or the errors in assembling. Actually, the noise can be attributed to a lot of fields such as the raw material, the assembling, the manufacturing equipment, the structural design, the precision of the roller bearing positioning. Then how should we solve these problems? Only can we understand the cause and generation of noises, we can suit the remedy to the case. The first step to lower the noise is to improve the precision of the assembling; each part has to be installed according to the requirement. Secondly, the good lubrication, which could have a good damping effect. Thirdly, improve the rotating precision of rollers and the design of roller bearings. With those, the noise level is lowered.Recently, the grinder machinery industry keeps robust, which generates a big sum of crushing equipments including the impact crusher, the jaw crusher, the cone crusher and the vertical shaft impact crusher. The amount is so big that it even confuses our customers. Of course, all of the machines above are used for crushing stones, while they are...