7011 CBGA/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7011 CBGA/P4A Bearing Product Overview & Core Advantages
The 7011 CBGA/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and rotational precision. Its 15° contact angle and extra light preload (Class A) make it ideally suited for high-speed operation, offering low friction and minimal heat generation. As a Universal Matchable (SU) bearing, it can be universally paired with another bearing of the same type to form a rigid, pre-loaded set, simplifying installation and ensuring optimal performance in spindle applications.
7011 CBGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| 7011 | Standard bore diameter (55 mm) & dimension series | Standardized bearing dimensions for interchangeability. |
| C | 15° nominal contact angle | Optimized for high-speed operation and moderate axial loads. |
| B | 40° contact angle design | Provides higher rigidity and axial load capacity. |
| GA | Light preload (Class A) | Reduces deflection, improves shaft rigidity, and minimizes noise and vibration. |
| P4A | High precision tolerance class | Ensures extremely tight running accuracy for precision bearing applications. |
7011 CBGA/P4A Bearing Structural Features & Performance Benefits
High-Speed Performance: The combination of a phenolic resin cage and a 15° contact angle enables a high limiting speed of 34,000 rpm. The lightweight cage reduces centrifugal forces, while the optimized contact angle minimizes heat generation at high rotational speeds.
Superior Rigidity and Load Capacity: The bearing's internal geometry and extra light preload provide high system rigidity, critical for minimizing shaft deflection under load. With a dynamic load rating of 3150 lbf and a static load rating of 2475 lbf, it is engineered to handle significant combined loads (radial and axial).
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore, outside diameter, and width, this bearing guarantees exceptional running accuracy and consistent performance in the most demanding high-precision machinery.
Universal Matching Design (SU): As a universally matchable bearing, any two 7011 CBGA/P4A bearings can be paired together in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement. This feature provides design flexibility and ensures optimal preload and performance without selective matching.
7011 CBGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Instrumentation: High-accuracy measuring equipment and laboratory instruments.
- High-Frequency Motors: Spindles for electric motors and generators requiring high rotational accuracy.
- Aerospace Systems: Gyroscopes, navigation systems, and other critical flight components.
- Medical Equipment: Dental handpieces and high-speed surgical tools.
