71911 ACDGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71911 ACDGC/P4A Bearing Product Overview & Core Advantages
The 71911 ACDGC/P4A is a single-row angular contact ball bearing designed for applications requiring high precision and moderate preload. Engineered to accommodate combined loads with a 25° contact angle, this bearing delivers exceptional rotational accuracy and rigidity in compact assemblies. Manufactured to P4A tolerance class, it ensures minimal runout and consistent performance in demanding high-speed environments up to 46,000 rpm. Its universal matching capability (SU) allows for flexible mounting configurations in multi-bearing arrangements.
71911 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing series designation |
| AC | Angular Contact design with 25° contact angle |
| DGC | Moderate preload (Class C) for enhanced rigidity |
| P4A | High precision tolerance class (exceeding ABEC 7) |
71911 ACDGC/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: The P4A tolerance class ensures exceptional dimensional accuracy with bore and outside diameter tolerances of -0.004mm to 0, providing superior running precision and minimal vibration.
High-Speed Capability: The phenolic cage and optimized internal geometry enable stable operation at limiting speeds of 46,000 rpm, making it ideal for high-speed spindle applications.
Enhanced Rigidity: With moderate preload (Class C), this bearing delivers increased stiffness while maintaining optimal thermal characteristics, crucial for machining accuracy.
Superior Load Capacity: Rated for radial dynamic load of 4095 lbf and radial static load of 3082 lbf, it reliably handles combined radial and axial loads in demanding applications.
Material Excellence: Constructed from chrome steel rings and balls with phenolic cage, offering excellent durability and thermal stability within the operating temperature range of -30°C to 110°C.
71911 ACDGC/P4A Bearing Typical Application Areas
Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines requiring exceptional accuracy and rigidity
High-Speed Motors: Precision electric motors, servo motors, and spindle drives operating at elevated speeds
Precision Instrumentation: Medical equipment, optical instruments, and measuring devices demanding minimal runout
Aerospace Components: Guidance systems, actuator mechanisms, and auxiliary power units requiring reliable performance
Robotics & Automation: Industrial robots, precision positioning systems, and automated manufacturing equipment
