Before Raymond mill are manual feeding, when the feeding, Banxia handle, feed mill began, while the rolling mill rolls together, this approach can not adjust the speed of the feed rollers can not automatically adjust rolling mill rolls away. Manual control is the most primitive of control, can not guarantee the timely roll grinding roll and feed roller clutch timely stops, resulting in an empty mill phenomenon, but the price is cheaper, still use this control on a small mill. Eighties of the more common applications of hydraulic feed control adjustment, the biggest drawback of this control system is a serious oil and 1990s gradually replaced by hydraulic control pressure control Raymond 4r, with a clean, no oil Raymond, multiple Mill can merit the same gas source. Raymond overall better use of imports, but the high price of equipment parts high maintenance costs, one of which is linked to frame thunder hammer Plum reached millions of dollars, while the price of domestic Raymond machine for less than three hundred thousand yuan Ray Mongolia mill 6r, want to maximize the life of spare parts. Since the heat treatment can not be effective after reaming, increasing the yield strength of the bolt and the difference between the threaded bore, in order to prevent the bolts and threaded Kong Fasheng engagement. After the reaming plum frame on Raymond machine, run so far no malfunction plum frame. Due to the threaded hole rack vertical mill plum injury is not the same we used different approaches, but the threads are worn plum frame reaming method we use, plum frame 5r not handle Raymond, opening method should be used. Reaming method that is the threaded holes on the expansion of the existing foundation. First, tapping new holes attack, if the teeth are not the same distance can not use this method. Raymond mill, Raymond Nehe, Yuxin Senda provided by Henan new Senda Heavy Machinery Co., Ltd.. Henan new Senda Heavy Machinery Co., Ltd. (www.hnsdzg.com) strong, credible, in Zhengzhou crushing grinding equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Yuxin Senda and you hand into the brilliant, for a better future!