71919 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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71919 CD/P4ADGA Bearing Product Overview & Core Advantages
The 71919 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-set pair, it enables simplified installation and optimal performance in high-speed configurations. Its P4A tolerance class ensures ultra-precise dimensional and running accuracy, making it ideal for machine tool spindles and other precision machinery. The bearing is pre-lubricated and features an open design with a phenolic cage, contributing to its high-speed capability of up to 16,000 rpm.
71919 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71919 | Basic bearing designation, indicating a metric angular contact ball bearing with a 95mm bore, 130mm OD, and 36mm width. |
| CD | Contact angle designation (15°). This specific angle optimizes the bearing for combined loads. |
| P4A | High-precision tolerance class, specifying extremely tight limits on bore, outside diameter, and width tolerances for superior running accuracy. |
| DGA | Universal matchable (SU) pairing designation. Two bearings are supplied as a pre-set matched set for simplified mounting and optimal preload. |
71919 CD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design with a 15° contact angle enables the bearing to efficiently support combined radial and axial loads simultaneously. When used as a universal matchable pair, the arrangement provides high system rigidity, essential for minimizing deflection in precision spindles.
High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the optimized internal geometry and pre-lubrication work in concert to achieve the high limiting speed of 16,000 rpm.
Precision Engineering: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications requiring high rotational accuracy and surface finish quality.
Universal Matchability: The SU universal matching feature allows the two bearings in the set to be mounted in either a back-to-back (DB) or face-to-face (DF) arrangement without requiring selective assembly, reducing installation time and complexity.
71919 CD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers.
- High-Frequency Motors: Spindles for PCB drilling and other high-speed electric motors.
- Precision Instrumentation: Rotary encoders, measuring devices, and scientific equipment.
- Aerospace Components: Gyroscopes, auxiliary power units, and other high-performance rotating systems.
