The main item that specifies the accuracy of the ball screw is "lead accuracy". Two items, "lead accuracy" and "appearance", are used to evaluate the level of the ball screw and distinguish its quality.

注释*

Comment*

＊导程精度：丝母的有效移动距离或者丝杠的有效螺纹长度累积代表导程误差及变动，或者，导程误差，螺纹全长内任意300mm的变动值或螺纹有效长度内任意一点旋转一周变动做出的规定（【图1】）。在【表1】【表2】列出了其允许值。

Lead accuracy: The effective movement distance of the screw thread or the accumulated effective thread length of the screw represents the lead error and variation, or the lead error refers to the variation value of any 300mm within the full length of the thread or the regulation made by rotating any point within the effective length of the thread for one cycle (【 Figure 1 】). The allowable values are listed in Table 1 and Table 2.

＊外观：滚珠丝杠表面不应有裂纹、功能性划痕、倒刺、锈蚀等缺陷。

Appearance: The surface of the ball screw should not have defects such as cracks, functional scratches, burrs, rust, etc.

以上只有使用的JIS（日本工业标准）和ISO3408-1：1991

The above only applies to the JIS (Japanese Industrial Standard) and ISO3408-1:1991 used

＝在JIS中＝

=In JIS=

滚珠丝杠划分为了6个等级（C0、C1、C3、C5、C7、C10）进行区分。

The ball screw is divided into 6 levels (C0, C1, C3, C5, C7, C10) for differentiation.

C0、C1、C3、C5，4个等级为精密滚珠丝杠、C7、C10，2个等级为普通滚珠丝杠。

C0, C1, C3, C5, 4 grades are precision ball screws, C7, C10, and 2 grades are ordinary ball screws.

＝在ISO3408-1：1991中＝

=In ISO3408-1:1991=

滚珠丝杠的等级划分为1、3、5、7、10共5个等级。定位用：1、3、5级3种、传送用的为7、10级。

The level of ball screws is divided into 5 levels: 1, 3, 5, 7, and 10. For positioning: 3 levels 1, 3, and 5, and for transmission: 7 and 10 levels.

与滚珠丝杠精度相关的用语进行说明

Explanation of terms related to ball screw accuracy

螺纹沟槽

Threaded groove

丝杠和丝母之间相对应的部分，滚珠转动的螺纹状空间

The corresponding part between the screw and nut, the threaded space where the ball rotates

滚珠丝杠的导程

Lead of ball screw

丝杠旋转一周同时螺母在轴方向的前进的距离

The distance that the screw rotates once while the nut advances in the axis direction

丝杠的导程

Lead of lead screw

同一条螺旋线上的相邻两牙在中径线上对应两点间的轴向距离

The axial distance between two adjacent teeth on the same helix and the corresponding two points on the centerline

基准导程

Reference lead

也叫做公称导程

Also known as nominal lead

实际导程

Actual lead

根据实际滚珠丝杠测定求得的导程

Measured lead based on actual ball screw

累积基准导程

Accumulated reference lead

按照基准导程以任意转数旋转时的积累的导程

Accumulated lead when rotating at any number of revolutions according to the reference lead

累积实际导程

Accumulated actual lead

从根据连续测定的累积导程的曲线图中求得的平均的倾向，或者是在包含螺杆轴的任意截面上测量得到的累积导程

The average tendency obtained from the curve plot of cumulative lead measured continuously, or the cumulative lead measured on any section containing the screw shaft

累积代表导程

Accumulated representative lead

代表实际导程倾向的的直线

A straight line representing the actual lead inclination

导程误差

Lead error

实际导程和基准导程的差值。比基准导程大的时候为正值，小的时候为负值

The difference between the actual lead and the reference lead. Positive value when larger than the reference lead, negative value when smaller

累积实际导程误差

Accumulated actual lead error

累积实际导程减去累积基准导程的差值

The difference between the cumulative actual lead and the cumulative reference lead

变动

change

平行于累积代表导程，包含累积实际导程值的两条平行直线，有关于下面三个代表项目

Two parallel lines parallel to the cumulative lead, including the maximum cumulative actual lead, are related to the following three representative items

a)丝母的有效移动距离或者丝杠螺纹有效长度对应的数值

a) The effective movement distance of the screw thread or the corresponding numerical value of the effective length of the screw thread

b)在有效螺纹长度范围内任取300mm对应的数值

b) Take any value corresponding to 300mm within the effective thread length range

c)在有效螺纹长度范围内任取一点旋转一周对应的数值

c) Take any point within the effective thread length range and rotate it for one corresponding value

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