7211 ACD/HCP4ADGB
Hybrid Ceramic Super Precision Bearings
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7211 ACD/HCP4ADGB Bearing Product Overview & Core Advantages
The 7211 ACD/HCP4ADGB is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. Its design is optimized to support combined loads, handling significant radial and axial forces simultaneously. Featuring a P4A tolerance class and a 25° contact angle, this bearing delivers superior running accuracy and high rigidity. The use of ceramic balls and a phenolic cage contributes to its capabilities as a high-speed bearing, enabling operation at limiting speeds up to 34,000 rpm. It is pre-lubricated and comes as part of a universally matchable (SU) set, ensuring ease of installation and consistent, reliable performance in precision assemblies.
7211 ACD/HCP4ADGB Bearing Model Code Explained, Specifications & Naming Convention
- 7211: Basic series number denoting a metric, double-row angular contact ball bearing with a 55 mm bore, 100 mm outside diameter, and 42 mm width.
- A: Signifies a 25° contact angle, optimized for supporting high axial loads.
- CD: Indicates a Universal Matchable (SU) bearing. Two bearings are supplied as a pre-set, universally matchable pair.
- HCP4A: Denotes the tolerance class P4A, representing very high precision levels for bore diameter, outside diameter, and width.
- DGB: Specifies the combination of components: D (Phenolic Resin Cage), G (Ceramic Balls), and a pre-applied B (Lubricant/Grease).
7211 ACD/HCP4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The double-row design and robust construction provide high radial and axial rigidity, enabling the bearing to handle significant combined loads with stability.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-friction ceramic balls reduces centrifugal forces and operating temperatures, allowing for a high limiting speed of 34,000 rpm.
- Precision and Accuracy: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and precise shaft positioning, which is critical for high-accuracy applications.
- Optimized for Matched Sets: Being Universal Matchable (SU), two bearings can be mounted together in various configurations (back-to-back, face-to-face, or tandem) to achieve the required preload and stiffness without selective assembly.
7211 ACD/HCP4ADGB Bearing Typical Application Areas
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Aerospace Control Systems
- Medical and Dental Equipment Drives
