S7015 CEGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7015 CEGB/P4A Bearing Product Overview & Core Advantages
The S7015 CEGB/P4A is a single-row angular contact ball bearing designed for high-precision applications demanding exceptional rotational accuracy and rigidity. Its defining feature is the 15° contact angle and P4A super-precision tolerance class, enabling it to handle significant combined loads (radial and axial) simultaneously. The bearing is universally matchable (SU designation), allowing for precise preload control when mounted in pairs. With its sealed construction and phenolic cage, it is engineered for reliable, high-speed operation up to 28,000 rpm, making it an ideal component for advanced machinery requiring uncompromising performance.
S7015 CEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit / Implication |
|---|---|---|
| S7015 | Basic bearing series designation. | Indicates a 75mm bore, 115mm OD, 20mm width single-row angular contact bearing. |
| C | 15° contact angle. | Optimized for high-speed applications with moderate axial load capacity. |
| E | Optimized internal geometry. | Enhanced design for higher speed and reduced noise and vibration. |
| GB | Grease lubrication with specific fill quantity. | Ensures optimal lubrication for the specified speed and temperature range. |
| P4A | Tolerance class superior to ABEC 7. | Guarantees extremely tight dimensional and running accuracy for superior performance in precision spindles. |
S7015 CEGB/P4A Bearing Structural Features & Performance Benefits
The performance of the S7015 CEGB/P4A is a direct result of its meticulous design and material selection:
- High Rigidity and Load Capacity: The 15° contact angle and robust construction using chrome steel for rings and balls provide excellent resistance to deformation under combined radial and axial loads (Dynamic Load Rating: 5850 lbf, Static Load Rating: 4860 lbf).
- Superior High-Speed Performance: The lightweight and robust phenolic resin cage (CEGB designation) minimizes centrifugal forces and ensures cage stability. Combined with the optimized internal geometry (E-design) and grease lubrication, it achieves an exceptional limiting speed of 28,000 rpm.
- Precision and Stability: Manufactured to P4A super-precision tolerances with extremely tight bore, OD, and width tolerances, this bearing ensures minimal runout and vibration, which is critical for maintaining machining accuracy.
- Universal Matchability (SU): This bearing is supplied as a universally matchable single bearing. When two are mounted together in a back-to-back or face-to-face arrangement, they can be preloaded to achieve the exact level of system rigidity and running accuracy required by the application.
S7015 CEGB/P4A Bearing Typical Application Areas
The S7015 CEGB/P4A is the bearing of choice for high-performance machinery where precision, speed, and reliability are non-negotiable. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for integrally mounted motor spindles.
- Robotics: High-accuracy joints and rotary actuators.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
