1.基本靜額定負荷

1. Basic static rated load

直線導軌在靜止或運動中若承受過大的負荷，活受有很大沖擊負荷時，會導致接觸面和鋼珠產生局部的變形，當變形量超過某一限度，將妨礙直線導軌運動的平穩性。基本額定負荷便是容許這個的變形量的極限負荷。依照定義：負荷的方向和大小不變的狀態下，在受到應力接觸面處，鋼珠與珠道表面的總變形量恰為鋼珠直徑萬分之一時的靜止負荷。

If a linear guide is subjected to excessive loads during static or motion, and is subjected to significant impact loads, it will cause local deformation of the contact surface and steel balls. When the deformation exceeds a certain limit, it will hinder the smoothness of the linear guide's motion. The basic rated load is the maximum load that allows for this deformation. According to the definition, in a state where the direction and magnitude of the load remain unchanged, the total deformation of the steel ball and the surface of the ball track at the stress contact surface is exactly one ten thousandth of the diameter of the steel ball under static load.

2.容許靜力矩（Mo）的定義

2. Definition of allowable static moment (Mo)

當滑塊受到應力鋼珠到上述定義靜額定負荷時，此時滑塊所承載之力矩稱為靜額定力矩，在直線導軌運動中是以（Mr）Mp

When the slider is subjected to a stress steel ball and reaches the static rated load defined above, the torque carried by the slider at this time is called the static rated torque, which is measured in (Mr) Mp during linear guide motion

My這三個方向定義：

My three directions are defined as:

3.靜系數

3. Static safety factor

當直線導軌使用在慢速運動和作動頻率不高的狀態下，需考慮靜系數。根據不同的使用狀況，計算靜負荷必須考慮不同的系數，尤其是當導軌受有沖擊性負時，需要取用較大的系數。

When using linear guides in slow motion and low operating frequency, the static safety factor needs to be considered. According to different usage conditions, different safety factors must be considered when calculating static loads, especially when the guide rail is subjected to negative impact, a larger safety factor needs to be taken.