直線導軌和滾動導軌的結構形式是怎么樣？其實直線導軌時屬于滾動導軌的一種而已，滾動導軌是一種滾動導引，它由鋼珠在滑塊與滑軌之間作無限滾動循環，使得負載平臺能沿著滑軌輕易的以高精度作線性運動，其摩擦系數可降傳統滑動導引的1/50，使之能輕易地達到μm級的定位精度。所以濟南共潤科技有限責任公司對于以下二者的結構做了總結:
What is the structure of linear guide and rolling guide? In fact, the linear guide rail belongs to a kind of rolling guide rail. The rolling guide rail is a kind of rolling guide rail. It uses steel balls to make infinite rolling cycle between the slide rail and the slide rail, so that the load platform can easily make linear motion with high precision along the slide rail, and its friction coefficient can be reduced to 1 / 50 of the traditional sliding guide rail, so that it can easily achieve the positioning accuracy of μ m level. Therefore, Jinan gongrun Technology Co., Ltd. summarizes the structure of the following two:
滾珠導軌因其在功能性能上不一樣，所以可以分為以下幾點：
The ball guide rail can be divided into the following points due to its different functional performance:
滾珠導軌
Ball guide
導軌以滾珠作為滾動體，運動靈敏度好，定位度高；但其承載能力和剛度較小，一般都需要通過預緊提高承載能力和剛度。為了避免在導軌上壓出凹坑而喪失精度，一般采用淬火鋼制造導軌面。滾珠導軌適用于運動部件質量不大，切削力較小的數控機床。
The guide rail uses the ball as the rolling body, which has good motion sensitivity and high positioning; however, its bearing capacity and stiffness are small, which generally need to be improved by pre tightening. In order to avoid the loss of accuracy due to the indentation on the guide rail, the guide rail surface is generally made of hardened steel. The ball guide is suitable for CNC machine tools with small moving parts and small cutting force.

滾柱導軌
Roller guide
導軌的承載力及剛度都比滾珠導軌要大，但對于安裝的要求也高。安裝不良，會引起偏移和側向滑動，使導軌磨損加快、降低精度。目前數控機床、特別是載荷較大的機床，通常都采用滾柱導軌。
The bearing capacity and rigidity of the guide rail are greater than that of the ball guide rail, but the installation requirements are also high. Poor installation will cause deviation and lateral sliding, which will speed up the wear of guide rail and reduce the accuracy. At present, CNC machine tools, especially those with large load, usually use roller guide.
滾針導軌
Needle guide
滾針導軌的滾針比同直徑的滾柱長度更長。滾針導軌的特點是尺寸小，結構緊湊。為了提高工作臺的移動精度，滾針的尺寸應按直徑分組。滾針導軌適用于導軌尺寸受限制的機床上。
The needle length of needle guide rail is longer than that of roller with the same diameter. The needle rolling guide rail is characterized by small size and compact structure. In order to improve the moving accuracy of the worktable, the size of the needle should be grouped according to the diameter. Needle roller guide is suitable for machine tools with limited guide size.