71919 CDGA/P4AL
71900 Series Super Precision Angular Contact Ball Bearings
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71919 CDGA/P4AL Bearing Product Overview & Core Advantages
The 71919 CDGA/P4AL is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Positioned in the P4A tolerance class, this bearing is designed to handle significant combined loads (radial and axial) simultaneously. Its extra light preload (Class A) minimizes deflection under operational stresses, making it ideal for high-speed spindles and precision machinery where running accuracy is paramount. The open design, combined with a phenolic cage, facilitates optimal lubrication flow and contributes to its high limiting speed of 16,000 rpm.
71919 CDGA/P4AL Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71919 | Basic bearing designation (95mm bore, 130mm OD, 18mm width) | Defines the core bearing dimensions |
| C | 15° contact angle | Optimized for axial load capacity |
| DG | Universal Matchable (SU designation) | Can be paired in matched sets (2 bearings) for preload control |
| A | Extra light preload (Class A) | Minimizes system deflection while maintaining high rigidity |
| P4A | High precision tolerance class | Superior dimensional and running accuracy for precision applications |
| L | Light preload designation | Specific preload category within the matched set system |
71919 CDGA/P4AL Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), ensuring exceptional running accuracy and minimal vibration.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and reduced friction, enabling the high limiting speed of 16,000 rpm. The open design allows for efficient lubrication management.
Superior Load Capacity: With a 15° contact angle and 28 chrome steel balls (11.112mm diameter), this bearing delivers robust radial dynamic load rating of 11,115 lbf and static load rating of 12,375 lbf, handling combined loads effectively.
Matched Set Flexibility: As a Universal Matchable (SU) bearing, it can be precisely paired with another identical bearing to form a preloaded duplex set, enhancing system rigidity and rotational accuracy.
Thermal Stability: The phenolic cage and chrome steel construction maintain dimensional stability across the operating temperature range (-30°C to 110°C).
71919 CDGA/P4AL Bearing Typical Application Areas
Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines requiring high precision and rigidity.
Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus where running accuracy is critical.
High-Speed Motors: Servo motors, spindle motors, and other high-RPM electric motors.
Aerospace Systems: Guidance systems, aircraft instrumentation, and auxiliary power units.
Medical Equipment: Dental handpieces, laboratory centrifuges, and diagnostic imaging systems.
