1、Better Bearing: Adopting 4 point contact design, it can uniformly bear loads in all directions and has self centering function, which can absorb assembly errors of the installation surface, and has high accuracy under high loads. 2、Reliable Works: High rigidity and accuracy. High speed, no jamming. Low friction, ultra quiet. High standard, more durable, wear resistant. 3、Larger Utility: Widely used in various industrial fields such as machine tools, engineering machinery, robots, reducers, steel, metallurgy, textiles, mining, printing, aerospace, etc. 4、Standard Sizes: The internal ball distribution is reasonable, and the gaps are evenly distributed. The surface are flat, and have high rotational speed and are not easy to get hot. 5、Steel Material: The guide rail is made of high carbon steel, which has long term wear resistance, strong stability, strong bending resistance, is not easily deformed or twisted, has strong hardness, good contact fatigue strength, while also retaining good toughness and can withstand high impact loads.