The transmission efficiency of ball screw is about 90~96%, and that of trapezoidal screw is about 26~46%. That is, if the same load is driven, the ball screw can use less driving power, such as a motor with smaller power, which can reduce both costs and energy consumption.

2、傳動速度。

2. Transmission speed.

滾珠絲杠是滾動摩擦，梯形絲杠是滑動摩擦，工作時(shí)前者的溫升遠(yuǎn)低于后者，因此可以承擔(dān)高速傳動任務(wù)。

The ball screw is rolling friction, and the trapezoidal screw is sliding friction. The temperature rise of the former is far lower than the latter when working, so it can undertake high-speed transmission tasks.

3、使用壽命。

3. Service life.

滾動摩擦的表面損傷比滑動摩擦的小很多，因此在清潔、潤滑等條件符合時(shí)，滾珠絲杠的維持壽命比梯形絲杠高得多。

The surface damage of rolling friction is much smaller than that of sliding friction, so when the cleaning, lubrication and other conditions are met, the maintenance life of ball screw is much higher than that of trapezoidal screw.

4、自鎖性。

4. Self locking.

自鎖性一般與傳動效率成反比，因此，滾珠絲杠幾乎沒有自鎖性，而梯形絲杠具有一定的自鎖性（視乎導(dǎo)程角的大小和工作面粗糙度）。

The self-locking property is generally inversely proportional to the transmission efficiency. Therefore, the ball screw has almost no self-locking property, while the trapezoidal lead screw has a certain self-locking property (depending on the lead angle and the roughness of the working surface).

5、經(jīng)濟(jì)性。

5. Economy.

從以前和目前的情況看，滾珠絲杠因其結(jié)構(gòu)較梯形絲杠復(fù)雜，價(jià)格仍然比梯形絲杠高。不過，隨著自動化設(shè)備的增多而產(chǎn)量變大，價(jià)格差異越來越小。

From the previous and current situation, the price of ball screw is still higher than that of trapezoidal screw due to its complex structure. However, with the increase of automation equipment, the output becomes larger and the price difference becomes smaller.

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