71915 CEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71915 CEGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its 15° contact angle and extra light preload (Class A) are optimized for high-speed operation while providing excellent rigidity. As a Universal Matchable (SU) bearing, it can be paired with another identical bearing to form a precisely matched set, enabling it to handle combined loads efficiently. This makes it an ideal solution for high-precision spindles and other demanding machinery.
71915 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71915 | Basic bearing designation (75mm bore, 105mm OD, 16mm width) |
| CE | Contact angle of 15° |
| GA | Preload code: Extra light (Class A) |
| P4A | Tolerance class: Higher than ABEC 7/ISO P4, indicating super-precision levels |
Structural Features and Performance Benefits
The 71915 CEGA/P4A incorporates several advanced design features that contribute to its outstanding performance:
- High-Speed Capability: The combination of a 15° contact angle, extra light preload, and phenolic resin cage enables a high limiting speed of 36,000 rpm. The phenolic cage offers excellent strength-to-weight ratio and operates smoothly at high rotational speeds.
- Superior Rigidity and Accuracy: Manufactured to P4A tolerance standards with extremely tight dimensional tolerances on bore, outside diameter, and width, this bearing provides exceptional running accuracy and system stiffness for precision applications.
- Optimized Load Capacity: With a dynamic load rating of 5062 lbf and static load rating of 3825 lbf, the bearing effectively handles combined radial and axial loads. The 23 high-precision chrome steel balls (9.525mm diameter) are precisely arranged to distribute loads evenly.
- Universal Matching Design: As a Universal Matchable (SU) bearing, two identical bearings can be mounted together in various configurations (back-to-back, face-to-face, or tandem) to create optimized bearing arrangements for specific application requirements.
71915 CEGA/P4A Bearing Typical Application Areas
The 71915 CEGA/P4A is specifically engineered for high-precision, high-speed applications including:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Spindles - PCB drilling machines, high-frequency motor spindles
- Medical Equipment - Dental handpieces, surgical tools, and imaging devices
- Aerospace Systems - Gyroscopes, navigation instruments, and auxiliary power units
- Robotics - High-precision robotic joints and articulation points
