71801 CD/P4QBCB
71800 Series Super Precision Angular Contact Ball Bearings
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71801 CD/P4QBCB Bearing Product Overview & Core Advantages
The 71801 CD/P4QBCB is a precision angular contact ball bearing configured as a Quadruplex Back-to-Back (QBC) matched set. Engineered for the most demanding applications, this bearing arrangement delivers exceptional high rigidity and stability, making it ideal for spindle systems requiring maximum accuracy. Its P4 tolerance class ensures superior running precision, while the light preload (Class B) minimizes deflection under operational stresses. This bearing is specifically designed to handle combined loads, including significant radial and axial loads in both directions, providing reliable performance in high-speed, high-precision environments.
71801 CD/P4QBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71801 | Basic bearing designation indicating a metric, ultra-light series bearing with a 12 mm bore. |
| CD | Indicates a specific internal design with a 15° contact angle and optimized internal geometry. |
| P4 | Denotes a high-precision tolerance class, superior to ABEC-7, for applications requiring minimal runout and vibration. |
| QBC | Signifies the bearing is supplied as a Quadruplex Back-to-Back matched set of four individual bearings. |
| B | Specifies the light preload level applied to the matched set, ensuring optimal stiffness and thermal stability. |
71801 CD/P4QBCB Bearing Structural Features & Performance Benefits
The performance of the 71801 CD/P4QBCB is a direct result of its advanced construction:
- High Rigidity & Stability: The Quadruplex Back-to-Back (QBC) arrangement creates an exceptionally stiff bearing system that effectively resists moment loads and shaft deflection, which is critical for maintaining accuracy in machining and precision equipment.
- Superior Load Capacity: With a 15° contact angle and a dynamic load rating of 1215 lbf, this bearing is engineered to handle significant combined radial and axial loads simultaneously.
- Optimized High-Speed Performance: The phenolic cage is lightweight and possesses excellent sliding properties, contributing to lower friction and enabling a high limiting speed. The bearings are pre-lubricated for immediate operation.
- Precision Engineering: Manufactured to P4 tolerance with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing ensures smooth, quiet, and precise rotation with minimal runout.
71801 CD/P4QBCB Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is specifically designed for advanced applications where accuracy and stability are paramount. Key industries and equipment include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed CNC Machining Centers
- Advanced Robotic Drives and Servo Motors
- Medical and Dental Instrument Drives
- Aerospace Actuation and Control Systems
