71804 CDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71804 CDGB/P4
Basic Information
System of measurement
Metric
Weight
0.018 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
32 mm
Outside diameter tolerance
-0.004mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
878 lbf
Radial static load rating
596 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71804 CDGB/P4 Bearing Product Overview & Core Advantages
The 71804 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. Its 15° contact angle is optimized to handle combined loads, efficiently supporting significant radial loads and axial loads in one direction. The light preload (Class B) minimizes deflection and ensures high system rigidity, making it ideal for high-speed spindles and precision machinery where stability is critical.
71804 CDGB/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71804 | Basic bearing series and size designation (20mm bore, 32mm OD, 7mm width). |
| C | Specifies a 15° contact angle. |
| DGB | Indicates a Universal Matchable (SU) bearing, designed to be mounted in sets (back-to-back, face-to-face, or tandem) with other bearings of the same code to achieve specific preload and rigidity characteristics. This bearing is part of a matched set of 4. |
| /P4 | Denotes a high-precision tolerance class with extremely tight dimensional and running accuracy tolerances. |
71804 CDGB/P4 Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row angular contact design, combined with a light preload and P4 precision, provides exceptional system stiffness and minimizes runout, which is crucial for machining accuracy.
- Optimized Load Capacity: The 15° contact angle enables the bearing to effectively support combined radial and axial loads. With a dynamic load rating of 878 lbf and a static load rating of 596 lbf, it offers reliable performance under demanding conditions.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 100,500 rpm. This makes the bearing suitable for very high-speed applications.
- Universal Matching Capability: The DGB (Universal Matchable) designation allows for flexible arrangement in sets of 2, 3, or 4 bearings to achieve customized preload and stiffness levels without selective mounting.
- Quality Materials: Constructed from chrome steel for both rings and balls, ensuring high durability and fatigue resistance.
71804 CDGB/P4 Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications demanding high speed, rigidity, and accuracy, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
