The rolling element is guided by a ball bearing contained in a sleeve or along a track. A linear motion bearing can contain ball bearings or roller bearings, which are flat cylinders. Bearings promote smooth, low friction motion, and they are usually lubricated in some way to further reduce friction and excite linear motion bearing systems for longer life. In some cases, these bearings are completely contained in the system to protect them from dust, dirt, and even impact damage, although in other cases, the bearings can be exposed along the track. The system usually includes the sliding surfaces of bearings that use a fixed plane and slide with each other.

滾動功能部件產品包括：滾珠絲杠副、滾動直線導軌副、滾珠花鍵、滾珠導套、直線運動部件、坐標工作臺、自鎖器等。它們以"滾動"為特征，具有省能、精密定位、精密導向、對CNC指令反應快速以及傳動的高速性、同步性、可逆性等功能，是數控機床和機電一體產品不可替代的關鍵配套件，也是符合21世紀生態、理念的重要基礎零部件。它們產品雖小，卻集成了精密零部件制造的許多關鍵技術。由于它們的標準化、系列化、通用化程度很高，又有廣闊的市場，十分有利于組織化大批量生產。

Products of rolling functional parts include: ball screw pair, rolling linear guide rail pair, ball spline, ball guide sleeve, linear motion parts, coordinate workbench, self-locking device, etc. Characterized by "rolling", they have the functions of high efficiency and energy saving, precise positioning, precise guidance, rapid response to CNC commands, high speed, synchronization and reversibility of transmission. They are irreplaceable key accessories for CNC machine tools and mechatronics products, and also important basic components that meet the ecological and environmental protection concepts of the 21st century. Although their products are small, they integrate many key technologies of precision parts manufacturing. Because of their high degree of standardization, serialization and generalization, and broad market, they are very conducive to organizing professional mass production.

隨著機床速度的提高，導軌的使用也由滑動向滾動轉化。在，由于機床速度較低及制造成本上的原因，滑動導軌的使用還占大多數，但使用滾珠導軌和滾柱導軌的機床數量在急速上升。由于滾動導軌具有高速、長壽命、可加預壓、安裝方便等方面的優點，隨著對機床性能及數控化要求的提高，滾動導軌使用比率的提高是必然的趨勢。

With the increase of machine speed, the use of guide rail has also changed from sliding to rolling. In China, due to the low speed of machine tools and manufacturing costs, sliding guide rails are still used in the majority, but the number of machine tools using ball guide rails and roller guide rails is rising rapidly. As the rolling guide has the advantages of high speed, long service life, preloading and convenient installation, with the improvement of machine tool performance and numerical control requirements, the improvement of the utilization ratio of rolling guide is an inevitable trend.

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