71806 CDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71806 CDGB/P4
Basic Information
System of measurement
Metric
Weight
0.026 kg
Tolerance class
P4
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
42 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
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
994 lbf
Radial static load rating
844 lbf
Limiting speed
83 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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71806 CDGB/P4 Bearing Product Overview & Core Advantages
The 71806 CDGB/P4 is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Operating under a Light preload (Class B), it delivers superior running stability and minimizes deflection under combined loads. Manufactured to P4 tolerance class, this bearing is designed for high-speed operation up to 83,000 rpm and is universally matchable (SU), allowing for precise axial clearance control when mounted in sets. Its compact design, with a 30 mm bore and 7 mm width, makes it ideal for space-constrained, high-performance assemblies.
71806 CDGB/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71806 | Basic bearing series and size designation (30mm bore, 42mm OD, 7mm width). |
| C | Specifies a 15° contact angle, optimized for handling high axial loads and providing high rigidity. |
| DGB | Indicates a Universal Matchable (SU) bearing designed for light preload (Class B) when mounted in a back-to-back arrangement. |
| P4 | Denotes a high-precision tolerance class with extremely tight dimensional and running accuracy tolerances. |
71806 CDGB/P4 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 15° contact angle and light preload provide excellent resistance to deflection, enabling the bearing to support significant combined radial and axial loads with high system stiffness.
- Superior High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to low friction, smooth operation, and stable performance at the high limiting speed of 83,000 rpm.
- Precision Engineering: Manufactured to P4 tolerance standards, this bearing ensures minimal runout and vibration, which is critical for applications demanding the highest levels of accuracy.
- Universal Matching Capability (SU): As a universally matchable bearing, any number of 71806 CDGB/P4 bearings can be paired in a set to achieve a specific preload or clearance without selective mounting, simplifying installation and inventory.
71806 CDGB/P4 Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance machinery and systems, including:
- Machine Tool Spindles for milling, grinding, and turning centers
- High-Speed Motors and Spindles
- Precision Gearboxes and transmission systems
- Medical and Dental Equipment spindles
- Robotic Arm Joints and Drives
