71819 ACD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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71819 ACD/P4DGA Bearing Product Overview & Core Advantages
The 71819 ACD/P4DGA is a super-precision angular contact ball bearing designed for the most demanding applications. Its Universal Matchable (SU) designation allows for flexible mounting in preloaded pairs or sets to achieve exceptional system rigidity and running accuracy. Engineered to a P4 tolerance class, this bearing delivers superior rotational precision and is optimized to handle combined loads with high reliability. The combination of a phenolic cage and a 25° contact angle makes it an ideal solution for high-speed spindles and other precision machinery requiring outstanding performance.
71819 ACD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71819 | Basic bearing series and size designation | Indicates the bearing's internal geometry and dimensions (95mm bore, 120mm OD) |
| AC | Angular Contact design | Optimized for combined radial and axial loads |
| D | High contact angle (25°) | Provides superior axial load capacity |
| P4 | Tolerance class | Super-precision grade for high-accuracy applications |
| DGA | Universal Matchable (SU) designation | Allows bearings to be mounted in any combination while maintaining preload |
71819 ACD/P4DGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design with a 25° contact angle enables the bearing to efficiently handle substantial combined radial and axial loads. When mounted in preloaded pairs, the system achieves exceptional stiffness, critical for machining accuracy.
High-Speed Performance: The lightweight phenolic resin cage ensures excellent dimensional stability and reduced centrifugal forces, contributing to the bearing's high limiting speed of 15,000 rpm. This makes it suitable for demanding high-speed applications.
Precision Engineering: Manufactured to P4 tolerance class with tight dimensional control on bore, outside diameter, and width, this bearing guarantees minimal runout and superior rotational accuracy. The Extra light preload (Class A) ensures smooth operation with minimal friction.
Universal Matching Capability: As a Universal Matchable (SU) bearing, the 71819 ACD/P4DGA can be paired in any combination (face-to-face, back-to-back, or tandem) without performance degradation, providing maximum design flexibility for precision spindle arrangements.
71819 ACD/P4DGA Bearing Typical Application Areas
The 71819 ACD/P4DGA is specifically engineered for high-performance applications requiring exceptional precision and speed:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling spindles
- High-Speed Motors: Precision electric motors and spindle drives
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: Dental handpieces, surgical tools, and imaging systems
- Precision Instruments: Measuring devices, optical scanners, and laboratory equipment
