Ceramic ball bearings

"Ball bearings with a material combination of bearing steel (inner and outer rings) and ceramic (balls) are called ‘hybrid’ ball bearings. All GMN ball bearings can be supplied as hybrid ball bearings. The material characteristics of ceramic balls in hybrid ball bearings result in significant increases in machine performance (in comparison to ball bearings using steel balls), especially under critical conditions.

Ceramic ball bearings are fully resistant to corrosion as both the external and internal races are made of stainless steel, while the inner cage is made of plastic material, which is resistant against high temperatures. Thanks to the low friction of the ceramic balls, the seaming rolls require a reduced lubrication – up to five times less than standards. This saves time for the operators and the machine downtime, allowing increased production.

A specialized design combines an external cylinder with a cylindrical raceway and balls that are incorporated in the retainer, making rotary and linear motion in the axial direction possible simultaneously with rotational motion. Small Rolling Frictional Resistance Incorporating a ball with high accuracy into the precisely polished external cylinder results in small rolling frictional resistance and extremely smooth rolling motion together with reciprocal motion. Low Inertia Since the retainer has high rigidity and is lightweight, it has low motion inertia, making it suitable for rolling motion and reciprocal motion in highspeed operations. A Variety of Models Standard and heavy load models are available, each with different load ratings, and each offered with or without seals. It is easy to choose the right product based on the specifications of your machine or device.

Hole Jewel contains a series of components that are chiefly applied as supporting bearings to the rotational systems of various accurate chronographs, auto-memorizing apparatus, precise instruments (micrometer, dial indicator) and other apparatus. Main types: Plane straight/olive holed bearing, single-cup plane straight/olive holed bearing, double-cups plane straight/olive holed bearing, raised olive holed bearing, and single-cup raised olive holed bearing, etc. ■Material Synthetic CZ/KY sapphire, ruby, single crystal α-Al2O3, natural agate, spinel, ceramic, etc.