71802 CDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71802 CDGA/P4 Bearing Product Overview & Core Advantages
The 71802 CDGA/P4 is a super-precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a single bearing with a 15° contact angle, it is optimized to carry combined loads—primarily thrust loads in one direction with significant radial loads. Its P4 tolerance class ensures ultra-precise running accuracy, while the extra light preload (Class A) minimizes friction and heat generation, making it ideal for high-speed spindles. This bearing is universally matchable (SU), allowing for precise axial play adjustment when mounted in pairs. The open design, combined with a phenolic cage, facilitates high limiting speeds and reliable operation.
71802 CDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71802 | Basic bearing series and size designation (15mm bore, 24mm OD, 5mm width). |
| C | Denotes a 15° contact angle, optimized for high-speed applications. |
| DG | Indicates the bearing is universally matchable (SU) for duplex mounting. |
| A | Specifies an extra light preload (Class A) for minimal running torque. |
| /P4 | Identifies the tolerance class P4, signifying superior dimensional and running accuracy. |
71802 CDGA/P4 Bearing Structural Features & Performance Benefits
High-Speed Capability: The combination of a phenolic resin cage, a 15° contact angle, and an open design allows for a very high limiting speed of 95,000 rpm. The lightweight cage reduces centrifugal forces, while the optimized internal geometry minimizes friction and heat buildup.
Precision & Rigidity: Manufactured to P4 tolerance standards, this bearing guarantees exceptional running accuracy and dimensional stability. The extra light preload eliminates internal clearance, resulting in high system rigidity and precise shaft positioning under load.
Superior Load Capacity: The angular contact design enables the bearing to efficiently support combined radial and axial loads. With a dynamic load rating of 515 lbf and a static load rating of 338 lbf, it offers reliable performance in demanding applications.
Universal Matching: The SU universal matching designation means any two 71802 CDGA/P4 bearings can be mounted together in various configurations (back-to-back, face-to-face, or tandem) to achieve the desired preload and stiffness without selective matching.
71802 CDGA/P4 Bearing Typical Application Areas
The 71802 CDGA/P4 is engineered for high-performance machinery where precision, speed, and rigidity are critical. Key application areas include:
- High-Speed Machine Tool Spindles for CNC milling, grinding, and drilling.
- Precision Robotic Drives and servo motors.
- High-Frequency Dental and Medical Handpieces.
- Aerospace Instrumentation and gyroscopes.
- High-Speed Centrifuges and laboratory equipment.
