7011 CD/P4ADBC
7000 Series Super Precision Angular Contact Ball Bearings
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7011 CD/P4ADBC Bearing Product Overview & Core Advantages
The 7011 CD/P4ADBC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement provides superior stiffness and moment load capacity, making it ideal for high-precision spindles. The bearing is pre-lubricated and features a moderate preload (Class C), ensuring optimal performance from installation without requiring initial adjustment. Its P4A tolerance class guarantees ultra-precise running accuracy for applications where minimal runout is critical.
7011 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing series and size designation (55mm bore, 90mm OD). |
| C | 15° contact angle, optimized for combined loads. |
| D | Indicates a duplex pair of bearings. |
| P4A | High precision tolerance class for superior running accuracy. |
| DB | Back-to-Back arrangement for high moment stiffness. |
| C | Moderate preload grade for enhanced rigidity. |
7011 CD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Moment Load Capacity: The duplex back-to-back (DB) configuration creates a wide effective spread between load centers, significantly increasing the bearing set's resistance to moment loads and providing exceptional stiffness, which is critical for maintaining precision under load.
Optimized for Combined Loads: The 15° contact angle is engineered to efficiently support combined radial and axial loads simultaneously, a common requirement in precision machinery.
High-Speed Capability: The lightweight phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to the high limiting speed of 34,000 rpm. The phenolic material offers excellent strength and lubrication compatibility.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional and running accuracy tolerances, this bearing minimizes vibration and runout, ensuring smooth, precise rotation.
Pre-lubricated & Ready-to-Install: The bearing is supplied pre-lubricated, simplifying installation and providing immediate protection, suitable for its specified temperature range.
7011 CD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers where precision and rigidity are paramount.
- Precision Rotary Tables: Indexing and positioning systems requiring high accuracy and minimal deflection.
- High-Frequency Motors & Spindles: Applications demanding high rotational speeds and running accuracy.
- Medical Equipment: Centrifuges and other high-speed precision medical devices.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotational mechanisms.
