S71911 ACEGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71911 ACEGA/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
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3330 lbf
Radial static load rating
2250 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
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In Stock
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S71911 ACEGA/P4A Bearing Product Overview & Core Advantages
The S71911 ACEGA/P4A is a super-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a single bearing from a universally matchable (SU) pair, it excels in handling combined loads, offering high rigidity and superior running accuracy. Its P4A tolerance class and extra light preload (Class A) ensure smooth, quiet operation at high speeds up to 34,000 rpm, making it ideal for high-precision, high-reliability spindles and machinery.
S71911 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
The S71911 ACEGA/P4A model code provides detailed technical specifications:
- S7: High-precision bearing series.
- 1911: Standard dimension series (19) and bore code (11 for 55mm bore).
- AC: Angular Contact design with a 25° contact angle.
- E: Optimized internal design for high-speed operation.
- GA: Universal Matchable (SU) bearing supplied with Extra light preload (Class A).
- P4A: Tolerance class denoting superior dimensional and running accuracy beyond ABEC 7.
- Sealed: Features integral seals for contamination protection and lubricant retention.
S71911 ACEGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design with a 25° contact angle enables the bearing to support significant combined radial and axial loads simultaneously, providing stable and rigid shaft support.
- Super-Precision & High-Speed Performance: Manufactured to a P4A tolerance class, this bearing guarantees minimal runout and vibration. The phenolic cage and optimized internal geometry contribute to its excellent high-speed capability, allowing stable operation at its limiting speed of 34,000 rpm.
- Universal Matchability: As part of a Universal Matchable (SU) set, these bearings can be mounted in tandem, back-to-back, or face-to-face arrangements without selective assembly, simplifying installation and ensuring optimal preload and performance.
- Sealed & Pre-lubricated: The integral seals protect against contaminants and retain the factory-applied grease lubrication, ensuring long service life and reduced maintenance in clean, high-speed environments.
S71911 ACEGA/P4A Bearing Typical Application Areas
This super-precision bearing is ideally suited for applications where high speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring and testing equipment.
- High-Frequency Motors & Spindles: PCB drilling spindles and dental handpieces.
- Robotics: High-accuracy joints and rotary actuators.
