7211 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7211 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7211 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a single bearing with a 15° contact angle and Extra Light (Class A) preload, it delivers high rigidity and precise rotational characteristics. Its universal matchable (SU) design allows for flexible mounting in various configurations. The combination of a ceramic ball material and P4A super-precision tolerance enables superior high-speed operation up to 34,000 rpm, making it ideal for machine tool spindles and other high-performance machinery.
7211 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- 7211: Basic bearing series with 55mm bore, 100mm OD, 21mm width
- C: 15° contact angle design
- DG: Universal matchable bearing (can be mounted in various arrangements)
- A: Extra light preload (Class A)
- HCP4A: High precision tolerance class P4A with enhanced running accuracy
7211 CDGA/HCP4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic cage and ceramic balls significantly reduce centrifugal forces, enabling exceptional limiting speeds of 34,000 rpm while maintaining stability.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for superior rotational accuracy.
Advanced Material Composition: Ceramic balls provide reduced weight, higher stiffness, and improved thermal stability compared to steel, while the phenolic cage offers excellent high-speed performance with minimal friction.
Optimized Load Capacity: With a radial dynamic load rating of 12,442 lbf and static load rating of 9,675 lbf, this bearing handles significant combined loads while maintaining precision.
7211 CDGA/HCP4A Bearing Typical Application Areas
The 7211 CDGA/HCP4A is specifically engineered for high-performance applications including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Instrumentation: Medical equipment, measuring devices, and optical systems
- High-Speed Motors: CNC spindle motors and high-frequency applications
- Aerospace Components: Guidance systems and precision actuators
- Robotics: High-accuracy robotic arms and automation equipment
