S71906 CDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71906 CDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.049 kg
Tolerance class
P4A
Seal type
Sealed
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
9 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
1609 lbf
Radial static load rating
1024 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
3
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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S71906 CDGB/P4A Bearing Product Overview & Core Advantages
The S71906 CDGB/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Operating under the P4A tolerance class, this metric bearing excels in high-speed scenarios, capable of reaching a limiting speed of 100,500 rpm. Its 15° contact angle and Universal Matchable (SU) design allow it to be preloaded in sets to handle significant combined loads—both radial and axial—simultaneously. The compact design, with a 9 mm width, makes it ideal for space-constrained, high-performance spindles and other precision machinery requiring superior running accuracy and long-term reliability.
S71906 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1906 | Bore size code (06 for 30 mm bore). |
| CD | Contact angle designation (15°). |
| G | Indicates a universal matchable bearing, allowing for flexible mounting arrangements. |
| B | Specifies a Light preload (Class B) for enhanced rigidity and reduced runout. |
| P4A | Denotes an ultra-high precision tolerance class superior to ABEC 7, ensuring minimal dimensional and running inaccuracies. |
S71906 CDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The bearing is designed to be used in matched sets (typically 3 bearings), which, when preloaded, create a highly rigid system capable of withstanding substantial combined loads. The 15° contact angle is optimized for applications requiring high axial stiffness.
- Super-Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees exceptional running accuracy and minimal vibration, which is critical for high-speed machining and precision instrumentation.
- High-Speed Capability: The lightweight and robust phenolic resin cage ensures stable operation and reduced centrifugal forces at the limiting speed of 100,500 rpm. The bearing comes pre-lubricated with high-performance grease suitable for its operational temperature range.
- Sealed and Pre-Lubricated: As a sealed bearing, it is protected from contamination and its pre-lubrication ensures long service life without the need for re-lubrication in many applications, reducing maintenance requirements.
S71906 CDGB/P4A Bearing Typical Application Areas
This super-precision angular contact ball bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and optical scanners.
- High-Frequency Spindles: PCB drilling and routing machines.
- Robotics: High-accuracy joints and servo motors.
