688 Deep Groove Ball Bearing(ZrO2)

688 (ZrO₂) Zirconia Full Ceramic Deep Groove Ball Bearing

The 688 (ZrO₂) is a miniature deep groove ball bearing featuring a core structure made entirely of Zirconia (ZrO₂) ceramic. It is engineered to excel in high-speed applications, corrosive environments, and situations requiring electrical insulation and broad temperature adaptability, making it a common choice for precision equipment and specialized operating conditions.

Key Features

Full Ceramic Advantages: ZrO₂ offers high hardness, excellent wear resistance, and corrosion resistance; it is non-magnetic and electrically insulating, thereby preventing electrochemical corrosion and magnetic interference.

Lightweight & Low Friction: With a density approximately one-third that of steel, the ceramic construction generates lower centrifugal force, making it ideally suited for high-speed rotation and low-torque drive systems.

Wide Temperature Range & Self-Lubrication: Capable of withstanding temperatures ranging from -50°C to +150°C. When paired with retainers made from materials such as PTFE, the bearing offers oil-free self-lubrication, significantly reducing maintenance requirements.

Low Noise & High Rigidity: Characterized by low vibration and noise levels, combined with high structural rigidity, making it an excellent choice for precision machinery.

Application Fields

Precision Equipment: 3D printers, drones, robotic joints, high-speed motors, and precision instruments.

Medical & Food Industries: Dental equipment, surgical instruments, and food processing machinery (benefiting from corrosion resistance and the absence of metal contamination).

Specialized Environments: Chemical processing and marine applications (corrosion resistance); aerospace (lightweight design and wide temperature tolerance); and defense/military sectors (anti-magnetic properties and electrical insulation).

Electronics & New Energy Technologies