71820 ACDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71820 ACDGA/P4 Bearing Product Overview & Core Advantages
The 71820 ACDGA/P4 is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, this metric bearing delivers superior performance in machine tool spindles, precision instruments, and other demanding equipment. Its 25° contact angle provides optimal axial load capacity while maintaining excellent radial load handling. The phenolic cage and universal matching capability (SU) enable high-speed operation and flexible mounting configurations in matched sets.
71820 ACDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Performance Benefit |
|---|---|---|
| AC | Angular Contact Design | Optimized for combined radial and axial loads |
| DGA | Extra Light Preload (Class A) | Minimal deflection under light loads, ideal for precision applications |
| P4 | High Precision Tolerance Class | Tight dimensional control for superior running accuracy |
71820 ACDGA/P4 Bearing Structural Features & Performance Benefits
High Precision Construction: The bearing features chrome steel rings and balls with P4 tolerance class, ensuring minimal runout and vibration for precision applications. The bore diameter tolerance of -0.004mm to 0 and outside diameter tolerance of -0.004mm to 0 guarantee consistent performance.
Optimized Load Capacity: With a 25° contact angle and 34 high-quality chrome steel balls, this bearing delivers excellent combined load capacity (radial dynamic: 4770 lbf, static: 6188 lbf), making it suitable for applications requiring both radial and axial load support.
High-Speed Performance: The phenolic cage provides superior strength-to-weight ratio and excellent performance at high speeds, supporting a limiting speed of 15,000 rpm. The cage design ensures stable operation and reduced friction.
Universal Matching Capability: Designed as Universal Matchable (SU), these bearings can be mounted in various preload configurations when used in pairs, offering flexibility in application design and optimization.
71820 ACDGA/P4 Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding machines
- Precision Instruments: Measuring equipment and optical devices
- High-Speed Motors: Servo motors and spindle drives
- Aerospace Components: Guidance systems and control mechanisms
- Medical Equipment: Dental handpieces and surgical tools
- Robotics: Precision joints and positioning systems
