Ball is an important part on the ball screw, but in the process of its circular motion, the touch between ball and screw will be detached, and some will keep the touch condition all the time. According to the circular method of the contact condition of ball and lead screw, we can divide it into two kinds: external circulation and internal circulation. The former can be detached, while the latter can not be detached. Now let's focus on these two methods:

一、外循環

First, external circulation

在外循環中，滾珠絲桿螺母的返回方法是有差異的，現在主要有三種，即螺旋槽式、插管式和端蓋式。

In the external circulation, the return methods of ball screw nuts are different. Now there are three main types: spiral groove type, intubation type and end cover type.

1、端蓋式

1. End Cover Type

從外觀上就可以看得出來，它的螺母上面能夠明晰地看到一個縱向孔，這是讓滾珠絲桿里邊的滾珠能夠順利地回到原來的位置。而在蓋板上面則會開上一個口兒，是作為滾珠回程之用的。滾珠就是在兩種措施的協助下實現的循環。

It can be seen from the appearance that a longitudinal hole can be clearly seen on the nut, which enables the ball inside the ball screw to return to its original position smoothly. On the top of the cover, there will be a slit, which is used for the return of balls. Ball is a cycle achieved with the assistance of two measures.

2、插管式

2. Intubation type

望文生義必定離不開管子的運用，而且運用的是彎形的管子，這種設計工藝能夠安定地確保滾準回程，但是關于這種類型的滾珠絲桿咱們要注意的是一定要加大彎管的徑向直徑，這樣才干確保它露在螺母外面。

Wangwenshengyi must be inseparable from the use of pipes, and the use of curved pipes, this design process can ensure stable roll back, but for this type of ball screw we must pay attention to increase the radial diameter of the elbow, so as to ensure that it is exposed outside the nut.

3、螺旋槽式

3. Spiral groove

螺旋槽式的螺母外面用銑床銑出了一個螺旋槽，所以很簡單從外觀辨認出。

A spiral groove is milled on the outside of the spiral groove nut, so it can be easily recognized from the outside.

第二、內循環

Second, internal circulation

在內循環滾珠絲桿里邊反向器的運用是十分要害的，它是確保滾珠能夠實現循環的前提條件，平常咱們觸摸到反向器主要有兩種類型，即圓柱凸鍵式和扁圓鑲塊式。

It is very important to use the reverse device inside the inner circle ball screw. It is the precondition to ensure that the ball can realize the cycle. Usually we touch the reverse device mainly has two types: cylindrical convex key type and flat circular insert type.

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The above news is our guide screw finishing and publishing. I hope you can like our website: http://www.traderpanda.net!