71811 CD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71811 CD/P4DGA Bearing Product Overview & Core Advantages
The 71811 CD/P4DGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4 tolerance class, this bearing is characterized by its ability to handle combined loads (radial and axial) simultaneously. Its extra light preload (Class A) minimizes deflection under light loads, ensuring smooth operation and high positional accuracy. The universal matchable (SU) design allows for flexible mounting in pairs to accommodate complex load conditions, making it an ideal choice for high-rigidity, high-precision spindles and machinery.
71811 CD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71811 | Bearing series and size designation (55mm bore, 72mm OD, 18mm width). |
| CD | Contact angle of 15°, optimized for high-speed operation and axial load capacity. |
| P4 | Indicates a high-precision tolerance class for superior running accuracy. |
| DGA | Universal matchable (SU) designation, allowing two bearings to be paired in a "back-to-back" or "face-to-face" arrangement without selective mounting. |
71811 CD/P4DGA Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The angular contact design and P4 dimensional tolerances provide exceptional stiffness and running accuracy, critical for minimizing deflection in precision applications.
Superior Load Capacity: With a 15° contact angle, this bearing efficiently supports significant combined radial and axial loads. The dynamic and static load ratings of 3780 lbf and 4860 lbf, respectively, ensure reliable performance under demanding conditions.
Optimized High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and enabling a high limiting speed of 34,000 rpm. The open design and factory-applied lubrication facilitate efficient heat dissipation.
Universal Matching Capability: The SU universal match feature simplifies installation and inventory, as any two bearings can be paired without selective grinding, providing design flexibility for preload and rigidity control.
71811 CD/P4DGA Bearing Typical Application Areas
The 71811 CD/P4DGA is engineered for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotic Drives: Arm joints and rotary actuators requiring high accuracy.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical Equipment: Dental handpieces and high-speed centrifuges.
- Aerospace Instrumentation: Gyroscopes and navigation systems.
