71907 CD/P4ADBB
71900 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
Product Overview and Core Advantages
The 71907 CD/P4ADBB is a precision angular contact ball bearing designed for applications requiring exceptional accuracy and rigidity. This duplex back-to-back (DB) arrangement bearing set is preloaded to Light / Class B specifications, ensuring minimal axial and radial play for superior rotational stability. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads from both directions—simultaneously. Manufactured to the exacting P4A tolerance class, it is an ideal solution for high-precision, high-rigidity, and high-speed machinery where uncompromising performance is critical.
71907 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing designation, indicating a metric, angular contact ball bearing with a 35 mm bore and specific cross-section. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates the bearing is part of a duplex pair. |
| P4A | Denotes an ultra-precision tolerance class with enhanced running accuracy requirements. |
| DB | Specifies the Back-to-Back (DB) matched arrangement, providing high moment rigidity. |
| B | Indicates the Light preload level applied to the matched set. |
Structural Features and Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft misalignment, making it exceptionally stable under complex loading conditions.
Superior Load Capacity: With a 15° contact angle and a dynamic load rating of 3578 lbf, this bearing set is engineered to handle significant combined radial and axial loads from both directions simultaneously.
Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces and ensures smooth operation at the high limiting speed of 56,000 rpm. The precision-ground chrome steel components contribute to low vibration and heat generation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees exceptional running accuracy, which is paramount for precision spindles and machinery.
71907 CD/P4ADBB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring maximum rigidity and running accuracy.
- Precision Gearboxes: Applications where low noise, high speed, and precise shaft positioning are critical.
- High-Frequency Motors and Spindles: For CNC machining, PCB drilling, and other high-RPM applications.
- Industrial Pumps and Compressors: Where reliable performance under combined loads is essential.
- Robotics and Automation: Precision joints and rotary axes demanding high stiffness and repeatability.
