71800 CD/P4DBB
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71800 CD/P4DBB Bearing Product Overview & Core Advantages
The 71800 CD/P4DBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back arrangement (DB) provides superior stiffness and the ability to handle combined loads, including significant radial and bidirectional axial loads. Manufactured to P4 tolerance class with a light preload, it ensures smooth, high-precision operation, making it ideal for high-speed spindles and other demanding machinery.
71800 CD/P4DBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71800 | Basic bearing series, indicating a metric, ultra-light section bearing. |
| C | 15° contact angle, optimized for high-speed applications and axial load capacity. |
| D | Indicates the bearing is part of a duplex pair. |
| P4 | High-precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
| DB | Back-to-Back arrangement. This configuration provides high moment rigidity and excellent stability under complex loads. |
71800 CD/P4DBB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) design creates a large spread between load centers, significantly increasing the bearing's moment stiffness and its ability to withstand combined radial and axial loads from both directions.
- Precision & High-Speed Performance: Built to P4 tolerance class with a 15° contact angle and a lightweight phenolic cage, this bearing achieves a high limiting speed of 95,000 rpm with minimal vibration and heat generation.
- Optimized Material & Preload: Components made from high-grade chrome steel ensure durability and long service life. The factory-applied light preload (Class B) eliminates internal clearance, ensuring precise shaft positioning and immediate response to load changes.
71800 CD/P4DBB Bearing Typical Application Areas
This high-precision duplex bearing is engineered for advanced machinery where accuracy, speed, and rigidity are paramount. Key applications include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotics and Automation Arms
- Medical and Dental Drill Handpieces
- Aerospace Actuators and Instrumentation
