How to choose the most practical range of specifications for straighteners and drawing machines? I believe that many people have this question. The production range given by the seller is the limit range that the machine can withstand. When the use of the file device reaches the limit range, the precision and service life of the device cannot be guaranteed.

The seller generally gives the maximum and minimum usage limits of the equipment. Generally, in this case, we will feel that the scope of purchase is too large and wasteful. In fact, it is not such a single one. To choose, the material with higher tensile strength should choose a relatively large model, and vice versa.

This should be treated according to the material. Generally, stainless steel should be one model or two models. The softer copper and aluminum are similar to the range given by the seller. Everyone handles as appropriate.