71911 ACEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71911 ACEGA/P4A Bearing Product Overview & Core Advantages
The 71911 ACEGA/P4A is a single row angular contact ball bearing manufactured to super-precision P4A tolerance class. Engineered for applications demanding exceptional rotational accuracy and high-speed performance, it features a 25° contact angle for optimal handling of combined radial and axial loads. Its phenolic resin cage and universal matching (SU) designation make it ideal for high-precision, high-rigidity arrangements in pairs. This bearing comes pre-lubricated for immediate use and is characterized by its compact cross-section and superior running accuracy.
71911 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing series and size designation (55mm bore, 80mm OD, 13mm width) |
| AC | Angular Contact design with a 25° contact angle |
| E | Optimized internal design for high-speed operation |
| GA | Universal Matchable bearing (SU designation) with specific preload |
| P4A | Super-precision tolerance class exceeding ABEC 7 standards |
71911 ACEGA/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The combination of the phenolic resin cage and optimized internal geometry (E-design) enables a high limiting speed of 39,000 rpm, making it an excellent high-speed bearing solution.
Precision & Rigidity: Manufactured to P4A tolerance class with extremely tight dimensional tolerances, this bearing ensures minimal runout and vibration. The 25° contact angle provides superior axial rigidity when arranged in pairs.
Universal Matching: Designated as Universal Matchable (SU), these bearings can be universally paired in any combination without performance degradation, simplifying inventory and mounting procedures for preloaded duplex sets.
Superior Load Capacity: With a dynamic load rating of 3330 lbf and static load rating of 2250 lbf, it reliably handles significant combined radial and axial loads in demanding applications.
71911 ACEGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-speed machining centers and precision grinding spindles
- Precision Instrumentation - Measuring equipment and optical devices requiring minimal runout
- High-Speed Motors - Servo motors and spindle motors demanding precision and speed
- Aerospace Components - Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment - Dental handpieces and laboratory instrumentation
