High-Performance Materials for Precision Angular Contact Bearings

Precision angular contact bearings are essential components in high-speed, high-accuracy machinery such as CNC machine tool spindles, motors, and precision equipment. At Beining Technology, we use advanced materials to ensure our bearings deliver long life, high reliability, and excellent performance under tough conditions.

1. Core Material: High-Carbon Chromium Bearing Steel

Most of our angular contact bearings (including rings and rolling elements) are made from high-carbon chromium steel, known for its excellent hardness, wear resistance, and fatigue strength.

Common Grades:

• GCr15 (China)
• SUJ2 (Japan)
• AISI 52100 (USA)

Key Features:

• Hardness after heat treatment: HRC 60–65
• Strong wear resistance for longer service life
• High purity through vacuum melting or electroslag remelting (impurities ≤0.005%)
• Widely used in standard applications like machine tool spindles and motors

2. Specialized Materials for Extreme Conditions

To meet the needs of harsh environments, we also offer bearings made from specialized materials:

 Case-Hardened Steel (e.g., 20Cr2Ni4)

• Surface hardness: HRC 58–62
• Durable surface with a strong, impact-resistant core
• Ideal for aerospace and heavy machinery

 Stainless Bearing Steel (e.g., 9Cr18Mo)

• Contains ~18% chromium for excellent corrosion resistance
• Suitable for medical devices, marine equipment, and food processing machines

 High-Temperature Steel (e.g., Cr4Mo4V)

• Maintains hardness (≥HRC 50) at temperatures up to 500°C
• Used in industrial furnaces and aerospace systems

 Ceramic Materials (Si₃N₄ or ZrO₂)

• 40% lighter than steel – ideal for high-speed applications
• Electrically insulating – prevents electrical erosion in motors
• Resists extreme temperatures and corrosion
• Often used in ultra-precision (P2-grade) bearings and semiconductor manufacturing

Exotic Alloys (Inconel 718, Titanium TC4)

• Designed for ultra-high-temperature (>500°C) or lightweight aerospace applications

3. Quality & Precision Processing

We ensure every bearing meets strict quality standards:

• Material Purity: Oxygen content ≤10 ppm to reduce fatigue failure
• Heat Treatment: Advanced quenching and tempering for uniform hardness and stability
• Surface Finish: Rolling surfaces polished to Ra ≤0.05 μm for smooth operation
• Dimensional Accuracy: Roundness tolerance ≤2–5 μm for P4/P2 grade bearings

Why Choose Beining Technology?

At Beining, we combine material science with precision engineering to deliver top-quality bearings:

• Custom Solutions: From GCr15 to ceramic hybrids, we tailor materials to your needs
• Advanced Manufacturing: Vacuum melting, forging, and cryogenic treatments improve performance
• Strict Testing: Ultrasonic inspection and fatigue testing ensure global quality standards

Conclusion

Whether you need standard high-carbon chromium bearings or specialized materials for extreme conditions, Beining Technology has the right solution. Explore our range of angular contact bearings designed for performance, durability, and precision.

If you have questions,or need more information,please feel free to contact us.Thanks.