71906 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71906 CD/P4ADGA
Basic Information
System of measurement
Metric
Weight
0.096 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2565 lbf
Radial static load rating
2059 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 120.33
/ each
In Stock
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71906 CD/P4ADGA Bearing Product Overview & Core Advantages
The 71906 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Manufactured to P4A tolerance class, it delivers superior running precision. Its universal matchable (SU) design allows two bearings to be paired in a back-to-back (DB) or face-to-face (DF) arrangement, simplifying mounting and enabling optimal stiffness and moment load capacity. Preloaded to Extra Light (Class A), it is engineered for high-speed operation and precise shaft positioning, making it ideal for high-performance spindles and precision machinery.
71906 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Basic bearing series and size designation (30mm bore, 47mm OD, 18mm width). |
| CD | Specifies a 15° contact angle and universal matchable (SU) design for high rigidity in paired arrangements. |
| P4A | Indicates a high-precision tolerance class with enhanced dimensional and running accuracy. |
| DGA | Signifies the bearing is lubricated and features a phenolic resin cage, contributing to its high-speed capability and reduced weight. |
71906 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 15° contact angle enables the bearing to support significant combined loads (radial and axial). When universally matched, the arrangement provides high system rigidity and excellent moment load resistance.
- Superior High-Speed Performance: The lightweight phenolic cage ensures stable operation at high rotational speeds, up to a limiting speed of 100,500 rpm. The optimized internal geometry minimizes friction and heat generation.
- Precision Engineering: Manufactured to P4A tolerance class with strict bore, outside diameter, and width tolerances, this bearing guarantees precise shaft runout and positioning accuracy, which is critical for precision applications.
- Durable Construction: Components made from chrome steel provide high fatigue life and durability. The open design allows for customized lubrication schemes to suit specific operational environments.
71906 CD/P4ADGA Bearing Typical Application Areas
This bearing is ideally suited for high-precision, high-speed machinery, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Aerospace Control Systems
- Medical and Laboratory Equipment
