7000 Angular Contact Ball Bearing (ZrO2)

The 7000 Angular Contact Ball Bearing (ZrO2) is a high-precision zirconia ceramic angular contact ball bearing. Its core is made of yttrium-stabilized zirconia, making it suitable for demanding and extreme transmission conditions. The following is an introduction to its basic parameters, core performance, and application areas:

I. Basic Dimensions and Weight Parameters

This bearing is model 7000. The core dimensions, installation dimensions, and weight parameters are all in millimeters (mm) and kilograms (kg), as follows:

Core Dimensions: Inner diameter d=10, Outer diameter D=26, Width B=8; Minimum fillet radius r=0.3, r1=0.15

Installation Dimensions: Minimum installation inner diameter da=12.5, Maximum installation outer diameter Da=23.5, Maximum installation fillet radius... ra=0.3

Reference weight: 0.014kg, highlighting its lightweight characteristics.

II. Core Performance Advantages

This bearing, relying on the properties of zirconia material and a proprietary structural design, exhibits excellent performance in load-bearing capacity, temperature resistance, wear resistance, and high-speed operation, making it suitable for various extreme working conditions. Its core performance characteristics are as follows:

● Complex Load Bearing Capacity: Utilizing an adjustable contact angle design of 15°–40°, it can efficiently withstand radial and axial complex loads, meeting the transmission needs of equipment subjected to multi-directional forces—a core characteristic of angular contact ball bearings.

● Extreme Temperature Resistance and Environmental Adaptability: Operating temperature range covers -200°C to +600°C, adaptable to extreme low and high temperature environments; simultaneously, its coefficient of thermal expansion is extremely low, resulting in low deformation during temperature changes and strong structural stability. It can operate normally without lubrication in a vacuum environment, reducing maintenance requirements.

● Outstanding High-Speed Operation Capability: High-speed performance can reach 1.5 times that of steel bearings. Its low-friction characteristics effectively reduce energy consumption and heat generation during high-speed rotation, making it suitable for the transmission requirements of high-speed equipment

● Superior Material Properties: The core material is yttrium-stabilized zirconia (ZrO2), possessing high hardness, strong corrosion resistance, and wear resistance, extending bearing life. Simultaneously, its low density enables lightweight bearings and provides excellent electrical insulation, preventing electrolytic corrosion damage caused by current flowing through the bearing.

● High-Precision Operating Characteristics: As a high-precision ceramic bearing, it offers high operating accuracy. Combined with low friction characteristics, it provides stable and smooth transmission for equipment, meeting the requirements of precision equipment.

III. Core Application Areas: Leveraging the above performance advantages, this bearing is primarily suitable for high-end equipment applications requiring high precision, temperature resistance, corrosion resistance, and high-speed operation. Specifically, it includes:

● Aerospace: Adapting to the extreme temperature variations, vacuum, and high-speed operating conditions of aerospace equipment, as well as the design requirements of lightweight and high reliability, providing transmission support for core components such as aerospace devices and aero-engines.

● Medical: Meeting the high-precision, corrosion-resistant, and sterile (lubrication-free) requirements of medical equipment, it can be applied to various precision medical instruments and surgical equipment.

● In the semiconductor field: Adapted to the vacuum, high precision, and electrical insulation requirements of semiconductor manufacturing equipment, it avoids current interference and equipment corrosion, ensuring the stability of semiconductor processes.

● In the high-speed spindle field: For high-speed spindles in equipment such as CNC machine tools and machining centers, leveraging their high speed, composite load capacity, and low friction characteristics, it improves spindle operating accuracy and efficiency.

Overall, the 7000 zirconia angular contact ball bearing is a high-precision transmission component designed specifically for high-end, extreme operating conditions. Through material and structural optimization, it overcomes the shortcomings of steel bearings in terms of temperature resistance, corrosion resistance, high speed, and electrical insulation, becoming a key core component in high-end equipment manufacturing.