S7015 CE/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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S7015 CE/P4ADGA Bearing Product Overview & Core Advantages
The S7015 CE/P4ADGA is a super-precision double row angular contact ball bearing engineered for applications demanding the highest levels of accuracy, rigidity, and speed. Its design is optimized to support combined loads (simultaneous radial and axial loads) from both directions. Featuring a P4A tolerance class and an extra light preload (Class A), this bearing ensures exceptional running accuracy and minimal thermal growth, making it ideal for high-reliability, high-performance spindles. The universal matchable (SU) design allows bearings to be mounted in any combination without a loss in preload, simplifying installation and enhancing performance consistency.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S7015 | Basic bearing series, indicating a 75mm bore double row angular contact ball bearing. |
| CE | Designates a 15° contact angle and specific internal geometry optimized for high-speed operation. |
| P4A | Indicates a super-precision tolerance class (exceeding ABEC 7/ISO P4), ensuring ultra-high dimensional and running accuracy. |
| DGA | Signifies a phenolic (polyamide) cage, which is lightweight and ideal for high-speed applications, and that the bearing is pre-lubricated with grease. |
S7015 CE/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double row design provides superior radial and axial rigidity compared to single row bearings, enabling stable support under combined loads. The 15° contact angle is optimized for high-speed performance while maintaining good axial load capacity.
Super-Precision Performance: Manufactured to P4A tolerance class with extremely tight bore, outside diameter, and width tolerances, this bearing guarantees minimal runout and vibration, which is critical for achieving superior surface finishes and machining accuracy.
High-Speed Capability: The lightweight phenolic cage (DGA) reduces centrifugal forces and allows for a limiting speed of 28,000 rpm. The optimized internal geometry and grease lubrication further contribute to stable, low-temperature operation at high rotational speeds.
Universal Matching & Simplified Installation: As a Universal Matchable (SU) bearing, any two S7015 CE/P4ADGA bearings can be paired in a back-to-back, face-to-face, or tandem arrangement without selective mounting, ensuring consistent preload and simplifying the assembly process.
S7015 CE/P4ADGA Bearing Typical Application Areas
The S7015 CE/P4ADGA is the bearing of choice for the most demanding high-precision and high-speed machinery, including:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling spindles.
- High-Frequency Motors: Spindles for PCB drilling and high-speed electric motors.
- Precision Instrumentation: Rotary encoders, measuring devices, and laboratory equipment.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
