S71911 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71911 ACDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.18 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
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4095 lbf
Radial static load rating
3082 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
4
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 ACDGA/P4A Bearing Product Overview & Core Advantages
The S71911 ACDGA/P4A is a super-precision double row angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This sealed metric bearing features an extra light preload (Class A) and a universal matching (SU) designation, allowing for precise performance in high-speed spindle arrangements. Its compact 13mm width and P4A tolerance class make it ideal for high-rigidity support in combination load scenarios, handling both radial and bidirectional axial loads simultaneously with superior reliability.
S71911 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Double Row Angular Contact Design (25° contact angle) |
| GA | Universal Matchable bearing with specific preload (Extra light / Class A) |
| P4A | Super Precision Tolerance Class (exceeding ABEC 7) |
S71911 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design with a 25° contact angle provides superior stiffness and enables the bearing to support significant combination loads, including radial forces and bidirectional axial thrust.
- Super-Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional runouts, ensuring minimal vibration and exceptional running accuracy for critical applications.
- Optimized High-Speed Operation: The lightweight phenolic resin cage and optimized internal geometry contribute to a high limiting speed of 34,000 rpm, reducing centrifugal forces and heat generation.
- Sealed & Pre-Lubricated: The integral seals protect against contamination and retain the factory-applied grease lubrication, offering a maintenance-free solution within the specified temperature range of -30°C to 110°C.
S71911 ACDGA/P4A Bearing Typical Application Areas
This bearing is engineered for high-performance machinery requiring utmost precision and speed, including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Motor Spindles
- Medical & Dental Equipment Spindles
- Advanced Robotics and precision positioning systems
