71807 CD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71807 CD/P4DGB
Basic Information
System of measurement
Metric
Weight
0.056 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
14 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1712 lbf
Radial static load rating
1946 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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71807 CD/P4DGB Bearing Product Overview & Core Advantages
The 71807 CD/P4DGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-loaded pair, it delivers superior performance in handling combined loads (radial and axial). Its P4 tolerance class ensures ultra-precise running, making it ideal for high-speed spindles and other critical machinery where reliability and minimal runout are paramount.
71807 CD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71807 | Basic bearing series, indicating a metric bore diameter of 35mm and a 15° contact angle. |
| CD | Specifies a universal matchable (SU) arrangement. Two bearings can be paired in any combination (face-to-face, back-to-back, or tandem) to achieve the required stiffness and load capacity. |
| P4 | Indicates a high-precision tolerance class, with extremely tight limits on bore, outside diameter, and width dimensions for superior running accuracy. |
| DGB | Signifies a Light preload (Class B). This preload eliminates internal clearance, enhancing bearing rigidity and system natural frequency, which is critical for high-speed applications. |
71807 CD/P4DGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and Light preload work in tandem to provide high system stiffness, enabling the bearing to effectively support combined radial and axial loads.
- Precision & High-Speed Performance: Manufactured to P4 tolerance standards and featuring a lightweight phenolic cage, this bearing is optimized for high-speed operation up to 56,000 rpm, minimizing friction and heat generation.
- Universal Matchability (SU): This feature provides exceptional flexibility in mounting. Two identical bearings can be easily paired to create a duplex set tailored for specific load and stiffness requirements without selective matching.
- Durable Construction: Made from chrome steel for both rings and balls, the bearing offers high fatigue resistance and long service life under demanding conditions.
71807 CD/P4DGB Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Gearboxes
- High-Frequency Motors
- Medical & Dental Equipment Spindles
- Aerospace Control Systems
