71807 CD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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71807 CD/P4DGA Bearing Product Overview & Core Advantages
The 71807 CD/P4DGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Its Universal Matchable (SU) design allows two bearings to be paired in a back-to-back (DB) or face-to-face (DF) arrangement, creating a preloaded set that delivers superior system rigidity and runout accuracy. This bearing is optimized to handle combined loads (radial and axial) simultaneously, making it an ideal choice for high-precision spindles and other critical machinery components.
71807 CD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71807 | Basic bearing series and size designation (35mm bore, 47mm OD, 14mm width). |
| CD | Indicates a 15° contact angle and specifies the internal radial clearance and tolerance for universal matching. |
| P4 | Denotes a high-precision tolerance class per ISO standards, ensuring minimal runout and vibration. |
| DGA | Signifies the bearing is lubricated and supplied from the factory, ready for installation. |
71807 CD/P4DGA Bearing Structural Features & Performance Benefits
The performance of the 71807 CD/P4DGA is driven by its meticulous construction:
- High Rigidity & Load Capacity: The angular contact design with a 15° contact angle is engineered to support significant combined loads. When mounted in a universal matched pair, the system provides high axial and radial stiffness, crucial for minimizing deflection under load.
- Super-Precision & High-Speed Operation: Manufactured to P4 tolerance standards, this bearing guarantees extreme dimensional and running accuracy. The lightweight phenolic resin cage ensures stable operation and low centrifugal forces, contributing to a high limiting speed of 56,000 rpm.
- Optimized for Matched Sets: The Universal Matchable (SU) feature means bearings are supplied with pre-calculated offsets. This allows for easy assembly into preloaded duplex pairs (DB or DF) without the need for selective shimming, simplifying installation and ensuring consistent, high performance.
- Durable Material Construction: Made from high-grade chrome steel for both rings and balls, the bearing offers excellent wear resistance and long service life under demanding conditions.
71807 CD/P4DGA Bearing Typical Application Areas
This super-precision angular contact ball bearing is ideally suited for high-performance applications where accuracy and speed are paramount, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Drives: High-frequency motor spindles and servo drives.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and navigation instruments.
- Medical Equipment: Dental handpieces and high-speed centrifuges.
