Changchun Realpoo Photoelectric Co.,Ltd.

Due to high polish level and good temperature stability , the jewel Sapphire & Ruby bearing is commonly used in a wide variety of industrial applications which required very low friction along with consistency in performance and long life.

Characteristic:

The benefits of jewel bearings include high precision, very small size and weight, low and predictable friction, good temperature stability, and the ability to operate without lubrication and in corrosive environments. Sapphire & Ruby bearings are known for their low dynamic friction and highly consistent static friction. Brass has a coefficient of static friction of 0.35 against steel, while sapphire has a coefficient of static friction of 0.10-0.15 against steel. sapphire surfaces are extremely hard and durable, with a Mohs hardness of 9 and a Nucleus hardness of 1800, and can remain smooth for decades of use, thereby reducing friction variability.