1、以負(fù)載確定直徑。電機(jī)性能參數(shù)中有輸出扭矩，如果還帶減速器也要算進(jìn)去（考慮效率），計(jì)算一下實(shí)際工況中需要多大推力，滾珠絲杠樣本（跟廠家要）有負(fù)載參數(shù)（即推力參數(shù)，一般標(biāo)示為動(dòng)負(fù)荷和靜負(fù)荷，看前者即可），選擇滾珠絲杠的公稱(chēng)直徑。

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、以馬達(dá)的直線(xiàn)速度和旋轉(zhuǎn)速度確定滾珠絲杠導(dǎo)程。電機(jī)確定了就知道輸出轉(zhuǎn)速，考慮一下你需要的直線(xiàn)速度，把電機(jī)轉(zhuǎn)速（如果帶減速器再除以減速比）乘以絲杠導(dǎo)程的值就是直線(xiàn)速度，該值大于需要值即可。

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、以實(shí)際需要確定確定滾珠絲杠長(zhǎng)度，如果增加了防護(hù)，比如護(hù)套，需要把護(hù)套的伸縮比值考慮進(jìn)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、以實(shí)際需要確定滾珠絲杠精度。一般機(jī)械選C7即可，數(shù)控機(jī)床類(lèi)選C5的比較多（對(duì)應(yīng)國(guó)內(nèi)標(biāo)準(zhǔn)一般是P5~P4和P4~P3級(jí)，具體參看樣本）。

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、以安裝條件和尺寸結(jié)構(gòu)等確定滾珠絲杠螺母形式（螺母有很多結(jié)構(gòu)，不同的螺母結(jié)構(gòu)尺寸略有不同，視情況選擇，建議不要選太特殊的，萬(wàn)一出點(diǎn)毛病維修換件無(wú)門(mén)）。

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、詢(xún)問(wèn)所選產(chǎn)品廠家的、付款條件和交貨時(shí)間。這一點(diǎn)設(shè)計(jì)人員不要以為就是采購(gòu)的事，事實(shí)上很多廠家（進(jìn)口國(guó)產(chǎn)一個(gè)樣）的產(chǎn)品樣本上有的型號(hào)它根本就不生產(chǎn)或者不接小額訂單，印上去大概是為了顯示我是大廠，無(wú)所不能造。別等你選完了出完圖了其他件按這個(gè)型號(hào)開(kāi)始做配件了去購(gòu)買(mǎi)的時(shí)候人家告訴你這個(gè)型號(hào)交貨期需要3、4個(gè)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、選擇確定安裝方式（端部）。這個(gè)安裝件可以自己設(shè)計(jì)，也可以買(mǎi)現(xiàn)成的，有標(biāo)準(zhǔn)安裝座可選。自己設(shè)計(jì)注意受力狀態(tài)，軸承選擇7000系列的，因?yàn)榻z杠工作時(shí)主要受軸向力，徑向受力要盡力避免。

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、考慮導(dǎo)向件和安裝能力。和滾珠絲杠配套的導(dǎo)向件選擇滾珠直線(xiàn)導(dǎo)軌，當(dāng)然直線(xiàn)軸和直線(xiàn)軸承的搭配是相對(duì)經(jīng)濟(jì)的選擇。

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、根據(jù)以上已確定條件繪出滾珠絲杠圖紙（主要是端部安裝尺寸，這個(gè)要詳細(xì)，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).