直线导轨（linear slider）可分为：滚轮直线导轨，圆柱直线导轨，滚珠直线导轨，三种，是用来支撑和引导运动部件，按给定的方向做往复直线运动。依按摩擦性质而定，直线运动导轨可以分为滑动摩擦导轨、滚动摩擦导轨、弹性摩擦导轨、流体摩擦导轨等种类。

　　Linear slides can be divided into three types: roller linear guides, cylindrical linear guides, and ball linear guides. They are used to support and guide moving parts to perform reciprocating linear motion in a given direction. According to the friction properties, linear motion guides can be divided into sliding friction guides, rolling friction guides, elastic friction guides, fluid friction guides, and other types.

　　1、定义：直线导轨又称线轨、滑轨、线性导轨、线性滑轨，用于直线往复运动场合，且可以承担一定的扭矩，可在高负载的情况下实现高精度的直线运动。在大陆称直线导轨，台湾一般称线性导轨，线性滑轨。2、分类：分为方形滚珠直线导轨，双轴芯滚轮直线导轨，单轴芯直线导轨。3、作用：直线导轨运动的作用是用来支撑和引导运动部件，按给定的方向做往复直线运动。依按摩擦性质而定，直线运动导轨可以分为滑动摩擦导轨、滚动摩擦导轨、弹性摩擦导轨、流体摩擦导轨等种类。　直线轴承主要用在自动化机械上比较多,像德国进口的机床、折弯机、激光焊接机等等，当然直线轴承和直线轴是配套用的。像直线导轨主要是用在精度要求比较高的机械结构上，直线导轨的移动元件和固定元件之间不用中间介质，而用滚动钢球。

　　1. Definition: Linear guide rail, also known as line rail, slide rail, linear guide rail, or linear slide rail, is used for linear reciprocating motion and can withstand a certain torque, achieving high-precision linear motion under high loads. In mainland China, it is called linear guide rail, while in Taiwan it is generally called linear guide rail. 2. Classification: Divided into square ball linear guide, double axis core roller linear guide, and single axis core linear guide. 3. Function: The function of linear guide motion is to support and guide moving parts to perform reciprocating linear motion in a given direction. According to the friction properties, linear motion guides can be divided into sliding friction guides, rolling friction guides, elastic friction guides, fluid friction guides, and other types. Linear bearings are mainly used in automation machinery, such as machine tools, bending machines, laser welding machines, etc. imported from Germany. Of course, linear bearings and linear shafts are used in conjunction. Linear guides are mainly used in mechanical structures with high precision requirements. There is no intermediate medium between the moving and fixed components of linear guides, but rolling steel balls are used.

　　4、自动调心能力：来自圆弧沟槽的DF(45-°45)°组合，在安装的时候，即由钢珠的弹性变形及接触点的转移，即使安装面多少有些偏差，也能被线轨滑块内部吸收，产生自动调心能力之效果而而得到高精度稳定的平滑运动。具有互换性由于对生产制造精度严格管控，直线导轨尺寸能维持在一定的水准内，且滑块有保持器的设计以防止钢珠脱落，因此部分系列精度具可互换性，客户可依需要订购导轨或滑块，亦可分开储存导轨及滑块，以减少储存空间。所有方向皆具有高刚性运用四列式圆弧沟槽，配合四列钢珠等45度之接触角度，让钢珠达到理想的两点接触构造，能承受来自上下和左右方向的负荷；在必要时更可施加预压以提高刚性。5、工作原理：可以理解为是一种滚动导引，是由钢珠在滑块跟导轨之间无限滚动循环， 从而使负载平台沿着导轨轻易的高精度线性运动，并将摩擦系数降平常传统滑动导引的五十分之一，能轻易地达到很高的定位精度。滑块跟导轨间末制单元设计，使线形导轨同时承受上下左右等各方向的负荷，的回流系统及精简化的结构设计让HIWIN的线性导轨有更平顺且低噪音的运动。

　　4. Automatic centering capability: The DF (45- ° 45) ° combination from the circular arc groove, during installation, is absorbed by the interior of the track slider due to the elastic deformation of the steel ball and the transfer of the contact point. Even if there is some deviation in the installation surface, it can produce the effect of automatic centering capability and achieve high-precision and stable smooth motion. Interchangeability: Due to strict control over production and manufacturing accuracy, the size of linear guides can be maintained within a certain level, and the slider is designed with a retainer to prevent steel balls from falling off. Therefore, some series of precision are interchangeable. Customers can order guides or sliders as needed, and they can also be stored separately to reduce storage space. All directions have high rigidity and use a four column circular arc groove, combined with a 45 degree contact angle of four columns of steel balls, to achieve an ideal two-point contact structure for the steel balls, which can withstand loads from up and down and left and right directions; When necessary, preloading can be applied to improve rigidity. 5. Working principle: It can be understood as a rolling guide, which is an infinite rolling cycle of steel balls between the slider and the guide rail, so that the load platform can easily move linearly with high precision along the guide rail, and the friction coefficient is reduced to one fiftieth of the usual traditional sliding guide, which can easily achieve high positioning accuracy. The final unit design between the slider and the guide rail enables the linear guide rail to simultaneously bear loads in all directions, including up, down, left, and right. The patented reflux system and simplified structural design enable HIWIN's linear guide rail to move more smoothly and with lower noise.

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