71810 CD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
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Product Overview and Core Advantages
The 71810 CD/P4DBA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. This duplex back-to-back (DB) matched set consists of two bearings pre-loaded to an Extra Light (Class A) specification, delivering superior system stability. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads in both directions—simultaneously. Manufactured to a P4 tolerance class, it is ideal for high-precision, high-speed spindles and other critical machinery where minimal runout and maximum stiffness are required.
71810 CD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71810 | Basic bearing designation, indicating a metric, extra-light series angular contact ball bearing with a 50mm bore. |
| C | 15° contact angle, optimized for high-speed performance and moderate axial load capacity. |
| D | Duplex (paired) bearing set. |
| P4 | Indicates a high-precision tolerance class with extremely tight dimensional and running accuracy limits. |
| DB | Matched arrangement: Back-to-Back. This configuration provides high moment rigidity and excellent stability under complex loads. |
| A | Specifies the preload level as "Extra Light" (Class A), minimizing friction and heat generation for optimal high-speed operation. |
Structural Features and Performance Benefits
- High Rigidity and System Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, which is critical for maintaining precision in machining and positioning applications.
- Superior Load Capacity: The angular contact design with a 15° contact angle enables the bearing to support substantial combined radial and axial loads from both directions simultaneously.
- Optimized High-Speed Performance: The lightweight phenolic cage ensures smooth operation and low centrifugal forces at high speeds, contributing to the high limiting speed of 46,000 rpm. The open design and factory lubrication further support efficient high-speed running.
- Precision Engineering: Manufactured to P4 tolerance class with extremely tight bore, outside diameter, and width tolerances, this bearing guarantees minimal vibration and precise rotational accuracy.
- Durable Construction: Components made from chrome steel provide high hardness and wear resistance, ensuring long service life under demanding conditions.
71810 CD/P4DBA Bearing Typical Application Areas
The 71810 CD/P4DBA is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Spindles: PCB drilling and routing spindles.
- Robotics: High-accuracy robotic arm joints and precision gearboxes.
