7901 Angular Contact Ball Bearing (ZrO2)

The 7901 type zirconia (ZrO₂) all-ceramic angular contact ball bearing is a high-performance precision component with a standard size of 12×24×6mm. It uses ceramic material instead of traditional steel and is designed for high-speed, high-precision, highly corrosive or extreme temperature conditions, while taking into account both lightweight and high reliability.

Performance Advantages (Enhanced by ZrO₂ Material)

● Lightweight and Low Friction: With a density approximately 70% that of steel, it experiences less centrifugal force during high-speed rotation, resulting in a friction coefficient as low as 0.0012, lower energy consumption, and more controllable temperature rise.

● Superior Corrosion Resistance: Resistant to acids, alkalis, salt spray, and most chemicals (except hydrofluoric acid and hot concentrated sulfuric acid), its lifespan in corrosive environments is more than 10 times that of steel bearings.

● High Temperature Resistance and Thermal Stability: Excellent high-temperature resistance; temperature changes have minimal impact on clearance, suitable for high-temperature conditions of 200℃~400℃, with minimal thermal deformation.

● Insulation and Non-Magnetic: Excellent electrical insulation properties prevent current erosion; non-magnetic properties make it suitable for magnetically sensitive equipment and vacuum environments.

● High Wear Resistance and Long Lifespan: With a hardness of 1200~1450HV, it exhibits outstanding wear resistance and a lifespan far exceeding that of traditional steel bearings, reducing maintenance costs.

● Self-lubricating adaptability: Allows for oil-free operation, suitable for high vacuum and lubrication-challenged scenarios, reducing the risk of contamination.

Core Application Areas

1. Precision Machinery and High-End Equipment

High-speed machine tool spindles, electric spindles: Suitable for high-speed, high-rigidity applications, ensuring machining accuracy.

Precision motors, hard disk drives: Low friction and low vibration characteristics, suitable for high-precision transmission.

Automation equipment, robot joints: Lightweight and high reliability, improving equipment response speed.

2. Special Working Conditions Industries

Chemical industry: Pickling equipment, chemical pumps, corrosive media delivery systems, resistant to strong corrosion.

Food/Medical industry: Hygiene requirements, corrosion-resistant, easy to clean, suitable for sterile environments.

Semiconductor/Electronics industry: Insulating and non-magnetic, suitable for chip manufacturing and vacuum equipment.

Metallurgy/High-Temperature Equipment: High temperature resistance and good thermal stability, suitable for furnaces and heat treatment equipment.

3. Aerospace and Marine Engineering

Aerospace: Gyroscopes, inertial measurement units, small aircraft engine components, suitable for extreme environments.

Marine vessels: Resistant to seawater corrosion, suitable for underwater equipment and ship propulsion systems.