71809 CDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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71809 CDGA/P4 Bearing Product Overview & Core Advantages
The 71809 CDGA/P4 is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Engineered to a P4 tolerance class, this bearing provides superior running accuracy and dimensional stability. Its extra light preload (Class A) minimizes deflection under light loads, making it ideal for high-speed spindles and precision instruments. The bearing is universally matchable (SU), allowing for flexible mounting in duplex pairs (DB, DF, DT) to achieve the required rigidity and load capacity for complex applications.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71809 | Basic bearing designation, indicating a metric, super-precision angular contact ball bearing with a 45mm bore. |
| CD | Contact angle of 15°, optimized for high-speed operation and moderate axial load capacity. |
| G | Indicates a universally matchable (SU) bearing, allowing for precise preload control when mounted in pairs. |
| A | Signifies an extra light preload (Class A) for minimal friction and optimal high-speed performance. |
| /P4 | Denotes a high-precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
71809 CDGA/P4 Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a 15° contact angle, phenolic resin cage, and extra light preload enables a high limiting speed of 41,000 rpm, reducing centrifugal forces and heat generation.
- Superior Rigidity & Accuracy: Manufactured to P4 tolerance standards with extremely tight bore, OD, and width tolerances, this bearing provides exceptional running accuracy and system stability under high-speed rotation.
- Optimized Load Capacity: The angular contact design efficiently supports combined radial and axial loads. The high ball count (31) and chrome steel construction contribute to its dynamic and static load ratings.
- Universal Matching: As a Universal Matchable (SU) bearing, it can be paired with another identical bearing in various arrangements (back-to-back, face-to-face, or tandem) to create a matched set that meets specific application requirements for preload and stiffness.
71809 CDGA/P4 Bearing Typical Application Areas
The 71809 CDGA/P4 is ideally suited for high-precision, high-speed machinery where accuracy and reliability are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instruments: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Spindles: PCB drilling and routing equipment.
- Robotics: High-precision robotic arm joints and servo motors.
