With the rapid economic growth, the development of guide rail has also made remarkable achievements. Linear guide rail is used in woodworking machinery, conveying machinery, electronic semiconductor equipment, robots, mechanical arms, etc., but sometimes many people don't know the difference between linear guide rail and linear slide rail, and confuse the two, although they are both parts of machinery, Bear a certain load and realize high-precision movement under high load. However, the linear guide rail and the linear slide rail are not the same before, and there are still different places.

直線導軌按照滾珠在導軌和滑塊之間的接觸牙型對直線導軌副進行分類，主要有歌德式牙型和圓弧式牙型。歌德式也稱作兩列式，圓弧式也稱作四列式。由于圓弧式牙型其接觸角在傳動中易變動，產生間隙與側向力變動，安裝容易。而歌德式牙型其接觸角能保持不變，剛性也比較穩定。一般而言直線導軌的常用結構以這兩種類型為主。通常，直線導軌副的選用需要根據使用條件、負載能力和預期壽命選用。

The linear guide rail pair is classified according to the contact tooth pattern of the ball between the guide rail and the sliding block, mainly including Gothic tooth pattern and arc tooth pattern. Goethe type is also called two column type, and circular arc type is also called four column type. Due to the circular arc tooth, its contact angle is easy to change in transmission, resulting in the change of clearance and lateral force, which is easy to install. However, the contact angle and rigidity of the Gothic tooth form can remain unchanged. Generally speaking, the common structures of linear guide rail are mainly these two types. Generally, the selection of linear guide rail pair needs to be selected according to the service conditions, load capacity and expected life.

直線導軌又可以分為滑動導軌和滾動導軌。滑動導軌是導軌和滑塊直接接觸，較低，精度也低，摩擦系數大。滾動導軌是在導軌和滑塊之間裝有滾動體，滾動導軌，結構較復雜，也比較高點，摩擦系數小，精度高，它的作用主要用來支撐和引導運動部件，讓它按照指定的方向做復線運動。由鋼珠在滑塊與導軌之間做無限的循環滾動，讓一些負載的平臺可以沿著導軌以高精度做線性運動，大大降低了摩擦系數，是比普通傳統的的滑動導軌1/50。

Linear guide rail can be divided into sliding guide rail and rolling guide rail. The sliding guide rail is in direct contact with the sliding block, with low price, low precision and large friction coefficient. The rolling guide rail is equipped with a rolling element between the guide rail and the sliding block. The rolling guide rail has complex structure, high price, small friction coefficient and high precision. Its function is mainly to support and guide the moving parts and make them move in a double line according to the specified direction. The steel ball makes infinite circular rolling between the sliding block and the guide rail, so that some loaded platforms can move linearly with high precision along the guide rail, greatly reducing the friction coefficient, which is 1 / 50 higher than the ordinary traditional sliding guide rail.

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