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.

注釋*

Comment*

＊導程精度：絲母的有效移動距離或者絲杠的有效螺紋長度累積代表導程誤差及變動，或者，導程誤差，螺紋全長內任意300mm的變動值或螺紋有效長度內任意一點旋轉一周變動做出的規定（【圖1】）。在【表1】【表2】列出了其允許值。

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.

＊外觀：滾珠絲杠表面不應有裂紋、功能性劃痕、倒刺、銹蝕等缺陷。

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（日本工業標準）和ISO3408-1：1991

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

＝在JIS中＝

=In JIS=

滾珠絲杠劃分為了6個等級（C0、C1、C3、C5、C7、C10）進行區分。

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

C0、C1、C3、C5，4個等級為精密滾珠絲杠、C7、C10，2個等級為普通滾珠絲杠。

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=

滾珠絲杠的等級劃分為1、3、5、7、10共5個等級。定位用：1、3、5級3種、傳送用的為7、10級。

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.

與滾珠絲杠精度相關的用語進行說明

Explanation of terms related to ball screw accuracy

螺紋溝槽

Threaded groove

絲杠和絲母之間相對應的部分，滾珠轉動的螺紋狀空間

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

滾珠絲杠的導程

Lead of ball screw

絲杠旋轉一周同時螺母在軸方向的前進的距離

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

絲杠的導程

Lead of lead screw

同一條螺旋線上的相鄰兩牙在中徑線上對應兩點間的軸向距離

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

基準導程

Reference lead

也叫做公稱導程

Also known as nominal lead

實際導程

Actual lead

根據實際滾珠絲杠測定求得的導程

Measured lead based on actual ball screw

累積基準導程

Accumulated reference lead

按照基準導程以任意轉數旋轉時的積累的導程

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

累積實際導程

Accumulated actual lead

從根據連續測定的累積導程的曲線圖中求得的平均的傾向，或者是在包含螺桿軸的任意截面上測量得到的累積導程

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

累積代表導程

Accumulated representative lead

代表實際導程傾向的的直線

A straight line representing the actual lead inclination

導程誤差

Lead error

實際導程和基準導程的差值。比基準導程大的時候為正值，小的時候為負值

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

累積實際導程誤差

Accumulated actual lead error

累積實際導程減去累積基準導程的差值

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

變動

change

平行于累積代表導程，包含累積實際導程值的兩條平行直線，有關于下面三個代表項目

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

a)絲母的有效移動距離或者絲杠螺紋有效長度對應的數值

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

b)在有效螺紋長度范圍內任取300mm對應的數值

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

c)在有效螺紋長度范圍內任取一點旋轉一周對應的數值

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

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