71818 CD/P4DGB
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
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71818 CD/P4DGB Bearing Product Overview & Core Advantages
The 71818 CD/P4DGB is a precision angular contact ball bearing designed for applications demanding high rotational accuracy and rigidity. As a universally matchable (SU) bearing supplied in a pre-loaded pair, it excels at handling combined loads—simultaneously supporting substantial radial and axial loads. Its P4 tolerance class ensures exceptional dimensional and running accuracy, making it ideal for high-speed spindles and other high-precision machinery. The light preload (Class B) minimizes deflection under operational forces, enhancing system stability and performance.
71818 CD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71818 | Basic bearing designation, indicating a metric angular contact ball bearing with a 90mm bore, 115mm OD, and 26mm width. |
| CD | Specifies a 15° contact angle and indicates the bearing is part of a universally matchable (SU) pair. This allows any two bearings with this suffix to be mounted together in various configurations (DB, DF, DT). |
| P4 | Denotes a high-precision tolerance class, with extremely tight limits on bore, outside diameter, and width tolerances for superior running accuracy. |
| DGB | Indicates a Light Preload (Class B). This pre-set internal load eliminates axial play, increases system rigidity, and ensures optimal performance under operational conditions. |
71818 CD/P4DGB Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design with a 15° contact angle is optimized to handle significant combined radial and axial loads. When mounted as a universally matched pair, the bearings provide exceptional stiffness, critical for minimizing shaft deflection in demanding applications.
Precision and High-Speed Performance: Manufactured to P4 tolerance standards, this bearing guarantees minimal runout and vibration. The phenolic cage is lightweight and robust, contributing to lower centrifugal forces and enabling smooth operation at the specified limiting speed of 15,000 rpm.
Optimized Material and Construction: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue life and durability. The open design allows for customized lubrication schemes to suit specific high-speed or temperature requirements within its operating range of -30°C to 110°C.
71818 CD/P4DGB Bearing Typical Application Areas
The 71818 CD/P4DGB is engineered for high-performance applications where precision and speed are paramount. Its primary uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: CNC machining centers and robotic arms.
- High-Frequency Motors and Spindles: Applications requiring minimal runout and high rotational accuracy.
- Medical and Laboratory Equipment: Centrifuges and other precision instruments.
