71809 CDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71809 CDGB/P4 Bearing Product Overview & Core Advantages
The 71809 CDGB/P4 is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, this bearing delivers superior running precision and is universally matchable (SU), allowing for flexible mounting arrangements in pairs to handle combined loads. Its compact design with a 7 mm width makes it ideal for space-constrained, high-speed applications such as precision spindles. The bearing is pre-lubricated and features a light preload (Class B), ensuring immediate operational readiness and consistent performance.
71809 CDGB/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71809 | Basic bearing designation indicating a metric, single-row angular contact ball bearing with a 45 mm bore. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| DGB | Indicates a universally matchable (SU) bearing designed for paired mounting (Duplex arrangement). "DB" signifies a back-to-back pairing capability for increased rigidity. |
| /P4 | Denotes a high-precision tolerance class with extremely tight dimensional and running accuracy tolerances for demanding applications. |
71809 CDGB/P4 Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance standards with a phenolic resin cage, this bearing ensures minimal vibration and high running accuracy. The 15° contact angle and universal matching capability allow for the creation of rigid, preloaded bearing sets that significantly enhance system stability.
- Optimized Load Capacity: Engineered to support combined radial and axial loads simultaneously. The single-row design with a high ball count (31 balls) provides a robust dynamic load rating of 1098 lbf and a static load rating of 1192 lbf.
- Superior High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 41,000 rpm, making it suitable for demanding high-speed spindle applications.
- Pre-Lubricated for Immediate Use: The bearing comes pre-lubricated, facilitating quick installation and ensuring optimal performance from startup within its specified temperature range of -30°C to 110°C.
71809 CDGB/P4 Bearing Typical Application Areas
The 71809 CDGB/P4 is engineered for high-performance machinery where precision and speed are critical. 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 Motors: Spindles for PCB drilling and small precision motors.
- Medical Equipment: High-speed handpieces and dental drills.
