7211 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7211 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7211 CD/HCP4ADGA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universally matchable (SU) bearing is manufactured to P4A tolerance class, ensuring ultra-precise dimensional control. Its key advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high rigidity, making it ideal for high-speed spindles and precision machinery. The combination of a ceramic ball material and phenolic cage contributes to superior high-speed performance, reduced weight, and extended service life.
7211 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7211 | Basic bearing series and size designation (55mm bore, 100mm OD, 42mm width). |
| CD | Contact angle of 15° and a specific internal design optimized for high-speed operation. |
| HC | Hybrid Ceramic construction, featuring ceramic balls for reduced friction and higher limiting speed. |
| P4A | Indicates a high-precision tolerance class with very tight running accuracy and dimensional tolerances. |
| DGA | Universal Matchable (SU) designation. Two bearings are universally matchable, allowing for flexible mounting arrangements (back-to-back, face-to-face, or tandem) to achieve desired rigidity and load capacity. |
7211 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design and universal matching capability allow for the creation of preloaded bearing sets, significantly increasing system rigidity and enabling the bearing to handle significant combined loads.
Superior High-Speed Performance: The use of a lightweight phenolic cage and ceramic balls (Hybrid Ceramic) reduces centrifugal forces and friction, enabling a very high limiting speed of 34,000 rpm. The 15° contact angle is optimized for high-speed applications.
Precision & Longevity: Manufactured to P4A precision standards, this bearing ensures minimal runout and vibration. The ceramic balls are non-corrosive and provide excellent wear resistance, contributing to a longer operational life and consistent performance.
Pre-lubricated: The bearing comes lubricated from the factory, ready for immediate installation and initial operation within its specified temperature range of -30°C to 110°C.
7211 CD/HCP4ADGA Bearing Typical Application Areas
The 7211 CD/HCP4ADGA is engineered for high-performance applications where precision, speed, and reliability are critical. Typical uses include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Instrumentation: Measuring and testing equipment.
- High-Frequency Motors and Spindles: Applications requiring extreme rotational accuracy.
- Robotics: High-accuracy joints and arm assemblies.
