71820 CD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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71820 CD/P4DGB Bearing Product Overview & Core Advantages
The 71820 CD/P4DGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a universal matchable (SU) bearing supplied in a light preload (Class B) configuration, it enables simplified mounting arrangements while maintaining optimal operational characteristics. Its primary advantage lies in its ability to handle combined radial and axial loads simultaneously, making it an ideal choice for high-rigidity, high-precision spindles and machinery where reliability is paramount.
71820 CD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Indicates a 15° contact angle and specific internal design optimized for high-speed operation and universal matching. |
| P4 | Denotes a high precision tolerance class (ISO P4 / ABEC 7), ensuring minimal runout and superior dimensional accuracy. |
| DGB | Signifies a universal matchable (SU) pair of bearings supplied with light preload (Class B), ready for installation without further adjustment. |
71820 CD/P4DGB Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4 tolerance class with a 15° contact angle, this bearing provides exceptional running accuracy and system stiffness, crucial for minimizing deflection under load.
Optimized High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio and low friction, contributing to the high limiting speed of 15,000 rpm. The universal matchable design ensures consistent preload and performance in paired arrangements.
Superior Load Capacity: With a dynamic load rating of 8,348 lbf and a static load rating of 13,162 lbf, it reliably handles significant combined loads. The use of high-grade chrome steel for rings and balls ensures durability and long service life.
Pre-Lubricated & Ready for Use: The bearing comes pre-lubricated, facilitating immediate installation and initial operation within its specified temperature range of -30°C to 110°C.
71820 CD/P4DGB Bearing Typical Application Areas
The 71820 CD/P4DGB is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and analytical equipment requiring minimal runout.
- High-Frequency Motors and Spindles: Applications where rotational accuracy and speed are critical.
- Robotic Drives and Servo Mechanisms: Providing precise motion control and high rigidity.
