When we choosing CNC machining centers, milling machines etc we will meet the problem?Hard rail or linear guide rail,which one is better? In fact, the opening and closing mechanism of Transformer oil tank radiator corrugated fins forming machine also have the same problem. But customers tend to ignore it, because considering cost and aesthetics elements, most manufacturers in the market just use liner guide rail. That is one of the key problems, why most machine can not produce good precision & appearance after one year. (Unless customers require to use linear guide rail, all JTFY1600&1300 transformer radiator corrugated fins forming machine just use standard hard rail) Let us to learn what is HARD RAIL and what is LINEAR GUIDE RAIL? Hard rail means that the guide rail and the machine bed are integral casting parts, and then the guide rail is processed on the basis of the casting. That is to say, the shape of the guide rail is cast on the bed, and then processed by quen