The trapezoidal lead screw and the ball lead screw are significantly different in several aspects，These differences are mainly structural、Working principle、Features and application scenarios。

one、Structural distinction

• Ladder lead screw：Relatively simple structure，A metal rod consisting primarily of trapezoidal threads whose threads are perpendicular to the axis（Lead screw）And trapezoidal nut consists of two parts。This simple structure makes the trapezoidal screw installation and maintenance are more convenient。

• Ball screw：Relatively complex structure，Except for screws and nuts，It also includes steel balls、Preforming plate、reverser、Dustproof device and other components。This complex structure makes the installation of ball screws more demanding，But it also provides higher accuracy and performance。

two、Difference in working principle

• Ladder lead screw：It works by the relative sliding of the oil film between the silk master and the lead screw，Linear motion is accomplished by sliding friction。Because of sliding friction，The precision and efficiency of the trapezoidal lead screw are relatively low。

• Ball screw：The working principle is to circulate in the bead groove between the screw and the nut through the ball，Convert rotational motion to linear motion。The rolling friction of the ball greatly reduces the friction，Improved transmission efficiency and accuracy。

three、Characteristic distinction

• Ladder lead screw：

• Low cost：Due to its simple structure and manufacturing process，The cost of the trapezoidal lead screw is relatively low。

• Easy to install：Easy to install and maintain。

• Average accuracy：Although it can meet some precision requirements are not high occasions，But compare that to ball screws，Its accuracy is low。

• High friction coefficient：Sliding friction results in large coefficient of friction，The transmission efficiency and accuracy are affected。

• Ball screw：

• High precision：The rolling friction of the ball makes the transmission accuracy of the ball screw much higher than that of the trapezoidal screw。

• High carrying capacity：The stress distribution of the ball is uniform，Can provide higher load carrying capacity。

• long-life：High strength ball and precision processing technology make the service life of the ball screw longer。

• Good stability：Smooth transmission of ball screw，Reduced mechanical vibration and noise。

• High cost：The complex structure and manufacturing process make the cost of ball screw high。

four、Application scenario difference

• Ladder lead screw：Because of its low cost、Simple installation and other features，Trapezoidal lead screw is mainly used in occasions where the accuracy requirement is not high，dumbwaiter、Industrial equipment。

• Ball screw：Due to its high accuracy、Advantages such as high carrying capacity and long life，Ball screw is widely used in high precision and performance requirements，Such as CNC machine tools、Medical equipment、Aerospace and other fields。

To sum up，Trapezoidal lead screw and ball lead screw in structure、Working principle、There are significant differences in characteristics and application scenarios。At the choice，It should be considered comprehensively according to the specific conditions and needs of use。