71900 CEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71900 CEGA/P4A Bearing Product Overview & Core Advantages
The 71900 CEGA/P4A is a single row angular contact ball bearing designed for high-precision and high-speed applications. Engineered to a P4A tolerance class, it delivers exceptional running accuracy and dimensional stability. Its key advantage lies in its ability to accommodate combined loads—handling significant radial loads alongside substantial unidirectional axial loads. The bearing features a 15° contact angle and an Extra Light (A) preload, making it ideal for applications demanding high rigidity, precise shaft positioning, and smooth operation at high rotational speeds. Its compact design, with a 10 mm bore and 6 mm width, is optimized for space-constrained, high-performance assemblies.
71900 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71900 | Basic bearing series and size designation. | Identifies the bearing's dimensions (10mm bore, 22mm OD). |
| CE | Contact angle of 15°. | Optimized for high-speed performance and axial load capacity. |
| GA | Universal Matchable (SU) bearing in a set of two with Extra Light preload (A). | Allows for precise bearing arrangement in pairs (back-to-back or face-to-face) to achieve optimal stiffness and load distribution without selective mounting. |
| P4A | High tolerance class (geometric and dimensional tolerances). | Ensures superior running accuracy, low noise, and minimal vibration for precision applications. |
71900 CEGA/P4A Bearing Structural Features & Performance Benefits
High-Speed & Rigidity: The 15° contact angle and phenolic resin cage material are key contributors to the bearing's high limiting speed of 185,000 rpm. The phenolic cage offers low mass and excellent sliding properties, reducing friction and heat generation. The specified Extra Light preload enhances system rigidity, minimizes axial and radial play, and improves rotational accuracy under load.
Load Capacity: Designed as an angular contact ball bearing, the 71900 CEGA/P4A efficiently supports combined loads. Its dynamic and static load ratings (457 lbf and 176 lbf respectively) are achieved through precision-ground chrome steel rings and balls, ensuring durability and long service life.
Precision & Matching: The P4A tolerance class guarantees tight control over all bearing dimensions and running accuracy. Its designation as a Universal Matchable (SU) bearing means it can be universally paired with any other SU bearing from the same lot, simplifying installation and ensuring consistent, high-performance preload in duplex sets.
71900 CEGA/P4A Bearing Typical Application Areas
The 71900 CEGA/P4A is ideally suited for high-performance machinery requiring exceptional precision and speed. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and drilling spindles.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines.
- High-Speed Motors: Spindles for PCB drilling and small-form-factor motors.
- Robotics: Joints and actuators in high-accuracy robotic arms.
