1. Determine the diameter based on the load. The performance parameters of the motor include output torque, and if a reducer is also included (considering efficiency), calculate how much thrust is required in actual working conditions. The ball screw sample (to be consulted with the manufacturer) has load parameters (i.e. thrust parameters, usually marked as dynamic load and static load, the former is sufficient), and select the nominal diameter of the ball screw.

2、以马达的直线速度和旋转速度确定滚珠丝杠导程。电机确定了就知道输出转速，考虑一下你需要的大直线速度，把电机转速（如果带减速器再除以减速比）乘以丝杠导程的值就是直线速度，该值大于需要值即可。

2. Determine the ball screw lead based on the linear and rotational speeds of the motor. Once the motor is determined, the output speed is known. Consider the maximum linear speed you need. Multiply the motor speed (if equipped with a reducer, then divide by the reduction ratio) by the lead of the lead screw to obtain the linear speed, which is greater than the required value.

3、以实际需要确定确定滚珠丝杠长度（总长=工作行程+螺母长度+余量+安装长度+连接长度+余量。如果增加了防护，比如护套，需要把护套的伸缩比值（一般是1：8，即护套的大伸长量除以8）考虑进去。

3. Determine the length of the ball screw based on actual needs (total length=working stroke+nut length+safety margin+installation length+connection length+margin). If protection is added, such as a protective sheath, the expansion ratio of the sheath (usually 1:8, which is the maximum elongation of the sheath divided by 8) needs to be taken into account.

4、以实际需要确定滚珠丝杠精度。一般机械选C7即可，数控机床类选C5的比较多（对应国内标准一般是P5~P4和P4~P3级，具体参看样本）。

4. Determine the accuracy of ball screws based on actual needs. Generally, C7 is sufficient for mechanical selection, while C5 is more commonly used for CNC machine tools (corresponding to domestic standards generally ranging from P5 to P4 and P4 to P3 levels, please refer to the sample for details).

5、以安装条件和尺寸结构等确定滚珠丝杠螺母形式（螺母有很多结构，不同的螺母结构尺寸略有不同，视情况选择，建议不要选太特殊的，万一出点毛病维修换件无门）。

5. Determine the form of the ball screw nut based on installation conditions and size structure (nuts have many structures, and different nut structures have slightly different sizes, depending on the situation. It is recommended not to choose too special ones, in case of any problems, repair or replacement parts without doors).

6、询问所选产品厂家的、付款条件和交货时间。这一点设计人员不要以为就是采购的事，事实上很多厂家（进口国产一个样）的产品样本上有的型号它根本就不生产或者不接小额订单，印上去大概是为了显示我是大厂，无所不能造。别等你选完了出完图了其他件按这个型号开始做配件了去购买的时候人家告诉你这个型号交货期需要3、4个月就完蛋了。

6. Inquire about the price, payment terms, and delivery time of the selected product manufacturer. Designers should not assume that this is just a matter of procurement. In fact, many manufacturers (one sample imported from China) do not produce or accept small orders for certain models on their product samples. Printing them is probably to show that I am a large factory and can make anything. Don't wait until you finish selecting and drawing other parts, and start making accessories based on this model. When you make a purchase, they will tell you that the delivery time for this model will take 3-4 months and it will be over.

7、选择确定安装方式（端部）。这个安装件可以自己设计，也可以买现成的，有标准安装座可选。自己设计注意受力状态，轴承好选择7000系列的，因为丝杠工作时主要受轴向力，径向受力要尽力避免。

7. Choose to determine the installation method (end). This installation component can be designed by oneself or purchased ready-made, with a standard mounting base available for selection. Design yourself and pay attention to the stress state. It is recommended to choose bearings from the 7000 series, as the screw is mainly subjected to axial force during operation, and radial force should be avoided as much as possible.

8、考虑导向件和安装能力。和滚珠丝杠配套的导向件选择滚珠直线导轨，当然直线轴和直线轴承的搭配是相对经济的选择。

8. Consider guide components and installation capabilities. It is recommended to choose a ball linear guide rail as the guide component that matches the ball screw. Of course, the combination of linear shaft and linear bearing is a relatively economical choice.

9、根据以上已确定条件绘出滚珠丝杠图纸（主要是端部安装尺寸，这个要详细，要提供形位尺寸和公差）。

9. Draw a drawing of the ball screw based on the determined conditions above (mainly the end installation dimensions, which should be detailed and provide geometric dimensions and tolerances).

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