71819 CD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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71819 CD/P4DBA Bearing Product Overview & Core Advantages
The 71819 CD/P4DBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This P4 tolerance class bearing features a back-to-back (DB) matched arrangement, enabling it to withstand combined radial and axial loads from both directions. Its extra light preload (Class A) ensures minimal friction and precise shaft positioning, making it ideal for high-speed spindles and other high-precision machinery. The open design and phenolic cage contribute to its superior performance in demanding operational environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71819 | Basic bearing designation, indicating a metric angular contact bearing with a 95 mm bore. |
| C | 15° contact angle, optimized for carrying significant axial loads. |
| D | Indicates a duplex pair of bearings. |
| P4 | Specifies a high-precision tolerance class for applications requiring extreme running accuracy. |
| DB | Denotes the back-to-back mounting arrangement, which provides high moment rigidity. |
| A | Signifies an extra light preload for high-speed operation with minimal heat generation. |
71819 CD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) arrangement creates a large spread between load centers, significantly increasing the bearing's resistance to moment loads and providing exceptional system rigidity.
Superior Load Capacity: With a 15° contact angle and a dynamic load rating of 8055 lbf, this bearing is engineered to handle substantial combined radial and axial loads simultaneously, making it suitable for complex loading conditions.
Optimized for High-Speed Operation: The lightweight phenolic resin cage ensures smooth operation and reduced centrifugal forces, while the extra light preload minimizes friction, allowing for a high limiting speed of 15,000 rpm.
Precision and Accuracy: Manufactured to P4 tolerance standards with tight dimensional controls on the bore diameter and outside diameter, this bearing guarantees precise shaft runout and positioning for critical applications.
71819 CD/P4DBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring high rigidity and running accuracy.
- Precision Gearboxes: Applications where precise shaft alignment and low operational noise are critical.
- High-Frequency Motors and Spindles: For pumps, compressors, and other machinery operating at elevated speeds.
- Medical and Laboratory Equipment: Centrifuges and other devices demanding smooth, precise, and reliable rotation.
- Robotics and Automation: Rotary joints and arm assemblies where compact, high-performance bearings are essential.
