7011 CD/P4ADBD
7000 Series Super Precision Angular Contact Ball Bearings
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7011 CD/P4ADBD Bearing Product Overview & Core Advantages
The 7011 CD/P4ADBD is a precision duplex angular contact ball bearing configured in a back-to-back (DB) arrangement. Engineered for applications demanding exceptional rigidity and accuracy, this P4A tolerance class bearing is preloaded to Heavy / Class D specifications. Its primary advantage lies in its ability to withstand combined loads—significant radial and axial loads from both directions—simultaneously, making it an ideal solution for high-precision, high-stiffness spindle systems and machinery.
7011 CD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing series and size designation (55mm bore, 90mm OD). |
| C | Specifies a 15° contact angle, optimized for high axial load capacity. |
| D | Indicates the duplex back-to-back (DB) mounting arrangement. |
| P4A | Denotes a high-precision tolerance class, exceeding standard ABEC 7/ISO P4 levels for superior running accuracy. |
| DB | Reinforces the back-to-back duplex preloaded set configuration. |
7011 CD/P4ADBD Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a large effective spread between load centers, providing exceptional moment stiffness and resistance to overturning moments. This configuration enables the bearing set to handle heavy combined radial and axial loads from any direction.
Precision & High-Speed Performance: Manufactured to P4A tolerance class with a phenolic cage, this bearing ensures minimal runout and stable operation. The phenolic cage, being lightweight and robust, contributes to lower centrifugal forces, supporting the high limiting speed of 34,000 rpm. The 15° contact angle offers a balanced performance for high-speed applications requiring significant axial load support.
Optimized for Performance: The set comes prelubricated and is preloaded to Heavy / Class D, ensuring immediate operational readiness, eliminating internal clearance, and providing consistent, precise rotational performance from startup.
7011 CD/P4ADBD Bearing Typical Application Areas
The 7011 CD/P4ADBD is specifically designed for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, engraving, and high-frequency motors.
- Industrial Pumps & Compressors: Where high axial and radial loads are present.
- Robotics: High-accuracy rotary joints and arm assemblies.
