71911 CEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71911 CEGA/P4A
Basic Information
System of measurement
Metric
Weight
0.17 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.004mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3510 lbf
Radial static load rating
2385 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
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
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In Stock
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71911 CEGA/P4A Bearing Product Overview & Core Advantages
The 71911 CEGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing with Universal Matchable (SU) designation, it can be precisely paired with a second identical bearing to form a preloaded duplex set, offering superior system rigidity. Its extra light preload (Class A) and P4A tolerance class ensure minimal runout and smooth operation, making it ideal for high-precision, high-reliability spindles and machinery.
71911 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| CE | Contact Angle of 15° | Optimized for handling combined radial and axial loads. |
| GA | Light Preload (Class A) | Reduces deflection under load, enhancing system stiffness and positioning accuracy. |
| P4A | High-Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy for precision applications. |
71911 CEGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The 15° contact angle and Class A preload work in concert to provide high axial and radial stiffness, crucial for minimizing shaft deflection under operational loads. The P4A tolerance class ensures exceptional running accuracy.
- Superior High-Speed Capability: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to the high limiting speed of 34,000 rpm. This makes it an excellent choice for high-speed spindle applications.
- Optimized Load Capacity: Manufactured from high-grade chrome steel for both rings and balls, the bearing offers a robust dynamic load rating of 3510 lbf and static load rating of 2385 lbf, reliably handling combined loads.
- Universal Matching Design (SU): As a universally matchable bearing, two 71911 CEGA/P4A units can be paired in various arrangements (e.g., back-to-back, face-to-face) to achieve specific preload and stiffness characteristics, offering great design flexibility.
71911 CEGA/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM machinery.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
