1、以负载确定直径。电机性能参数中有输出扭矩，如果还带减速器也要算进去（考虑效率），计算一下实际工况中需要多大推力，滚珠丝杠样本（跟厂家要）有负载参数（即推力参数，一般标示为动负荷和静负荷，看前者即可），选择滚珠丝杠的公称直径。

1. Determine the diameter according to the load. The output torque is included in the motor performance parameters. If there is a reducer, it should also be included (considering the efficiency). Calculate how much thrust is required in the actual working condition. The ball screw sample (with the manufacturer) has load parameters (i.e. thrust parameters, which are generally marked as dynamic load and static load, just look at the former). 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. The lead of the ball screw is determined by the linear speed and rotation speed of the motor. When the motor is determined, you will know the output speed. Consider the linear speed you need. Multiply the motor speed (if equipped with reducer and then divided by the reduction ratio) by the lead screw lead is 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，如果增加了防护，比如护套，需要把护套的伸缩比值考虑进去。

3. The length of the ball screw shall be determined according to the actual needs. If the protection, such as the sheath, is added, the expansion ratio of the sheath shall 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. The ball screw needs to determine the actual accuracy. Generally, C7 can be selected for machinery, and C5 is selected for CNC machine tools (the corresponding domestic standards are generally P5 ~ P4 and P4 ~ P3, see 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. The form of ball screw nut shall be determined according to the installation conditions and size structure (the nut has many structures, and the structural dimensions of different nuts are slightly different. It is recommended not to select too special ones according to the situation. In case of any fault, there is no way to repair and replace them).

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. Ask about the price, payment terms and delivery time of the selected product manufacturer. Designers should not think that this is a matter of procurement. In fact, some models on the product samples of many manufacturers (one imported and one made in China) do not produce or receive small orders at all. It is probably printed to show that I am a big manufacturer and can't make anything. Don't wait until you finish selecting and drawing other parts and start making accessories according to this model. When you go to buy, people tell you that the delivery date of this model needs 3 or 4 months.

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. Select and determine the installation method (end). This mounting part can be designed by yourself or bought off the shelf. There are standard mounting seats available. Pay attention to the stress state in their own design. 7000 series bearings are selected, because the lead screw mainly receives axial force when working, 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 the guide and installation capacity. It is recommended to choose the ball linear guide for the guide supporting the ball screw. Of course, the matching 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 the ball screw drawing according to the above determined conditions (mainly the end installation dimension, which shall be detailed, and the geometric dimension and tolerance shall be provided).