1. High guiding precision the guiding precision refers to the accuracy of THK guide track, which is an important precision index of guide pair. The smaller the deviation between the actual trajectory of the moving part and the given direction, the higher the guiding accuracy.

影响导向精度的主要因素有:导轨承导面的几何精度、导轨的结构类型、导轨副的接触精度和表面粗糙度;导轨和支承件的刚度;导轨的油膜厚度和油膜刚度;导轨和支承件的热变形等。

The main factors affecting the guiding accuracy are: the geometric accuracy of the guide bearing surface, the structure type of the guide, the contact accuracy and surface roughness of the guide pair; the stiffness of the guide and the supporting parts; the oil film thickness and stiffness of the guide; the thermal deformation of the guide and the supporting parts, etc.

导轨的几何精度一般包括导轨在垂直平面、水平平面内的直线度和两条导轨面间的平行度或两导轨面间横向某长度的扭曲值，精度要求可以用导轨全长上的误差△或单位长度上的误差S表示。

The geometric accuracy of the guide rail generally includes the straightness of the guide rail in the vertical plane and the horizontal plane, the parallelism between the two guide rail surfaces or the transverse twist value of a certain length between the two guide rail surfaces. The accuracy requirements can be expressed by the error △ of the total length of the guide rail or the error s of the unit length.

2.移动灵敏度和定位精度均高移动灵敏度(移动分辨率)指工件台完成一次移动能达到的短距离，定位精度指工件台由运动状态停止在某一指定点的能力。移动灵敏度和定位精度与导轨的类型、摩擦特性、运动速度、传动刚度、移动件质量等因素有关。

2. The moving sensitivity and positioning accuracy are both high. The moving sensitivity (moving resolution) refers to the short distance that the worktable can achieve by completing a movement, and the positioning accuracy refers to the ability of the worktable to stop at a specified point from the moving state. The moving sensitivity and positioning accuracy are related to the type of guide rail, friction characteristics, moving speed, transmission stiffness, mass of moving parts and other factors.

3.具有低速运动的平稳性低速运动的平稳性，是指导轨在低速运动或微量移动时不发生爬行等不连续运动的现象。它与导轨的结构、导轨副材料匹配、润滑状况、润滑剂性质及导轨运动传动系统的刚度等因素有关。

3. It has the stability of low-speed movement. The stability of low-speed movement refers to the phenomenon that the guide rail does not crawl and other discontinuous movement when it moves at low speed or slightly. It is related to the structure of the guide rail, the material matching of the guide rail pair, the lubrication condition, the nature of the lubricant and the rigidity of the drive system of the guide rail.

4.刚度大导轨受力后的变形将影响部件之间的相对位置和导向精度。刚度对高精度机械和仪器尤为重要。

4. The deformation of rigid guide rail will affect the relative position and guiding accuracy of components. Stiffness is particularly important for high precision machinery and instruments.

5.抗振性好杭振性主要是指抗受迫振动的能力和抗自激振动的能力。对于闭环控制系统来说，不仅要求导轨对启动、制动的跟踪灵敏度高，还要求它要有适当的粘滞阻尼特性，以防止在启动、制动过程中发生不稳定现象。

5. Good vibration resistance. Vibration resistance mainly refers to the ability to resist forced vibration and self-excited vibration. For the closed-loop control system, not only the high tracking sensitivity of the guide rail to start and brake, but also the proper viscous damping characteristics are required to prevent instability in the process of start and brake.

6.发热小在高速运动时，要求导轨的发热小。

6. Small heating when moving at high speed, the heating of guide rail is required to be small.

7.结构工艺性好在满足设计要求的前提下，导轨应尽量做到制造、维修、保养方便，成本低廉等。

7. The structure has good processability. On the premise of meeting the design requirements, the guide rail should be easy to manufacture, repair and maintain, and the cost is low.