S7011 CB/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7011 CB/HCP4ADGA Bearing Product Overview & Core Advantages
The S7011 CB/HCP4ADGA is a super-precision double row angular contact ball bearing engineered for applications demanding the highest levels of accuracy, rigidity, and speed. Its design excels at simultaneously supporting combined radial and axial loads from both directions. Featuring a P4A tolerance class, ceramic balls, and a phenolic cage, this bearing is optimized for superior performance in high-speed, high-rigidity spindles and other critical machinery where uncompromising reliability is essential.
Model Code Breakdown
- S70: Super-precision angular contact ball bearing series
- 11: Dimension series code (Bore: 55mm, OD: 90mm, Width: 36mm)
- CB: Universal Matchable (SU) designation. Two bearings are supplied as a pre-matched set for simplified mounting and optimal performance.
- HC: Hybrid Ceramic construction, indicating ceramic balls for reduced friction, lower heat generation, and higher speed capability.
- P4A: Tolerance class exceeding ABEC 7/ISO P4, ensuring extremely tight dimensional and running accuracy.
- DGA: Designates the use of a phenolic (polyamide) cage and grease lubrication suitable for the specified high-speed operation.
S7011 CB/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design and 15° contact angle provide exceptional rigidity, enabling precise support for spindles under significant combined loads. The bearing's robust construction delivers a high dynamic load rating of 5062 lbf.
Superior High-Speed Performance: The combination of ceramic balls (reducing centrifugal forces and friction) and a lightweight phenolic cage allows for a high limiting speed of 34,000 rpm. This makes it ideal for demanding high-speed applications.
Precision & Thermal Stability: Manufactured to a P4A tolerance class, this bearing guarantees minimal runout and vibration. The phenolic cage and hybrid construction contribute to stable operation across a wide temperature range (-30°C to 110°C).
Simplified Installation: As a Universal Matchable (SU) set, the two bearings are pre-configured to be mounted in any combination (back-to-back, face-to-face, or tandem) without requiring selective assembly, saving time and ensuring optimal preload and performance.
S7011 CB/HCP4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring extreme accuracy and smooth operation.
- High-Frequency Motors and High-Speed Routers.
- Medical Equipment: Dental handpieces and other high-speed medical devices.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
