With the emergence of automatic machine tools and new tool materials, the cutting speed of machine tools has been continuously improved. Some machine tools still need to work in some special environment, such as high temperature, high humidity, etc., so the service under special conditions puts forward higher requirements for the material requirements and thermal treatment of the lead screw itself.

滾珠絲杠的應用是機床產品現代化的一個趨勢，不僅僅數控機床，而且在普通機床上也逐漸推廣采用。數控機床上使用的滾珠絲杠對精度要求較高，通常我們建議采用C5及以上精度的絲杠，普通機床C7精度也可滿足。

The application of ball screw is a trend of the modernization of machine tools, not only CNC machine tools, but also in ordinary machine tools. The precision of ball screw used in CNC machine tools is very high. Generally, we suggest to use C5 and above precision ball screw, and C7 precision of ordinary machine tools can also meet the requirements.

滾珠絲杠的優勢在于它具有傳動效率高(為滑動絲杠的2～4倍。)，壽命長(為梯形螺紋淳硬絲杠的5～10倍)，進給均勻平穩，低速時無爬行，定位準確和重復精度高等一系列優點。

The advantage of ball screw is that it has high transmission efficiency (2-4 times of sliding screw), Long service life (5-10 times of trapezoidal screw), uniform and stable feed, no crawling at low speed, accurate positioning and high repetition accuracy.

那么，滾珠絲杠的材質要求通常有哪些呢？

So, what are the material requirements of ball screw?

滾珠絲杠選材的一般要求

General requirements for material selection of ball screw

我們知道，獲得要求的精度，并且長期保持精度不變是滾珠絲杠工藝工作的根本出發點。所以正確選用材料，并施以適當的熱處理，可使絲杠具有足夠的耐磨性和穩定性。滾珠絲杠的工作表面還需要零受接觸應力，故其材料應能保證獲得HRC58～62的高硬度，以防止由于表面硬度降低而導致承載能力下降。目前，我們廣泛采用的材質為Gcr15軸承鋼，是業內普遍認為的適合制作滾珠絲杠的材質。

We know that to obtain the required accuracy and keep the accuracy unchanged for a long time is the fundamental starting point of ball screw process work. Therefore, proper selection of materials and proper heat treatment can make the lead screw have enough wear resistance and stability. The working surface of ball screw also needs zero contact stress, so its material should be able to obtain high hardness of HRC58-62, so as to prevent the bearing capacity from decreasing due to the decrease of surface hardness. At present, our widely used material is GCr15 bearing steel, which is generally considered to be suitable for making ball screw in the industry.