S71911 CEGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71911 CEGA/P4A
Basic Information
System of measurement
Metric
Weight
0.17 kg
Tolerance class
P4A
Seal type
Sealed
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
Grease
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
No drawings available at the moment, will be launched soon
In Stock
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S71911 CEGA/P4A Bearing Product Overview & Core Advantages
The S71911 CEGA/P4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a single bearing from a universally matchable (SU) pair, it excels in handling combined loads—simultaneously supporting significant radial loads and axial loads in one direction. Its P4A tolerance class ensures ultra-precise dimensional and running accuracy, making it ideal for high-rigidity, high-reliability spindle arrangements and precision machinery where minimal runout and smooth operation are critical.
S71911 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CE | Enhanced internal design with a 15° contact angle and optimized internal geometry for superior high-speed performance. |
| GA | Indicates a light preload (Class A) is applied. This preload eliminates internal clearance, enhancing system rigidity and rotational accuracy. |
| P4A | Specifies an ultra-high precision tolerance class superior to ABEC 7, ensuring extremely tight limits on bore, outside diameter, and running accuracy. |
S71911 CEGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 15° contact angle and light preload (GA) work in concert to provide exceptional system stiffness, minimizing deflection under load and ensuring precise shaft positioning, which is critical for machine tool spindles.
- Superior High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal design and high-grade grease lubrication enable a high limiting speed of 34,000 rpm.
- Optimized Load Capacity: Engineered to handle combined radial and axial loads efficiently. The dynamic and static load ratings (3510 lbf / 2385 lbf) provide reliable performance in demanding conditions.
- Universal Matching Design (SU): This bearing is universally matchable, allowing any two bearings to be paired in a duplex arrangement (e.g., DB, DF) without selective matching, simplifying installation and inventory.
- Sealed & Lubricated for Life: As a sealed bearing, it is protected from contamination and is pre-lubricated with high-performance grease, offering a maintenance-free solution within its specified temperature range of -30°C to 110°C.
S71911 CEGA/P4A Bearing Typical Application Areas
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Machining Centers
- PCB Drilling and Milling Spindles
- Precision Instrumentation and Rotary Encoders
