71911 ACEGA/P4AH1
71900 Series Super Precision Angular Contact Ball Bearings
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71911 ACEGA/P4AH1 Bearing Product Overview & Core Advantages
The 71911 ACEGA/P4AH1 is a single-row angular contact ball bearing engineered for ultra-high precision applications. Positioned in the P4A tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its 25° contact angle is optimized to handle significant axial loads in one direction while supporting substantial radial loads. Manufactured with phenolic resin cage and universal matchable (SU) design, this bearing enables precise preload control when mounted in pairs, making it ideal for high-speed spindles and other demanding precision machinery where minimal runout and maximum rigidity are critical requirements.
71911 ACEGA/P4AH1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing designation indicating size series and bore diameter |
| AC | Angular Contact design with 25° contact angle |
| E | Optimized internal design for enhanced performance |
| GA | Universal matching bearing set with specific preload (Extra light / Class A) |
| P4A | High precision tolerance class with enhanced running accuracy |
| H1 | Preload specification for matched bearing sets |
71911 ACEGA/P4AH1 Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional accuracy and minimal runout for precision applications.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio, enabling stable operation at limiting speeds up to 39,000 rpm while reducing centrifugal forces and friction.
Superior Load Capacity: With a 25° contact angle and optimized internal geometry, this bearing delivers radial dynamic load rating of 3330 lbf and static load rating of 2250 lbf, making it suitable for combined loading conditions.
Universal Matching Design: As a Universal Matchable (SU) bearing with extra light preload (Class A), it can be precisely paired to achieve optimal preload and stiffness in duplex arrangements without selective matching.
Material Excellence: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and dimensional stability across the operating temperature range of -30°C to 110°C.
71911 ACEGA/P4AH1 Bearing Typical Application Areas
Machine Tool Spindles: High-precision machining centers, CNC milling machines, and grinding spindles requiring exceptional rotational accuracy and rigidity.
High-Speed Motors: Precision electric motors, servo motors, and spindle drives where high rotational speeds and minimal vibration are essential.
Robotics & Automation: Industrial robots, precision positioning systems, and automated manufacturing equipment demanding high accuracy and reliability.
Aerospace Components: Gyroscopes, navigation systems, and aircraft instrumentation requiring ultra-precise rotational elements.
Medical Equipment: High-speed dental handpieces, laboratory centrifuges, and medical imaging devices where precision and reliability are critical.
