S7215 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7215 CDGA/P4A Bearing Product Overview & Core Advantages
The S7215 CDGA/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high rigidity. As a single bearing with a Universal Matchable (SU) designation, it can be precisely paired with another identical bearing to form a pre-loaded duplex set, optimizing system performance. Its P4A tolerance class ensures superior dimensional and running accuracy, making it ideal for high-speed spindles and other high-precision machinery. The combination of a 15° contact angle and extra light preload (Class A) provides excellent performance for combined loads while facilitating high rotational speeds.
S7215 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7215 | Basic bearing series designation, indicating a 75mm bore, 130mm OD, and 25mm width. |
| C | Specifies a 15° contact angle. |
| DG | Indicates a Universal Matchable (SU) bearing, designed to be paired in a duplex set. |
| A | Denotes an Extra Light Preload (Class A). |
| P4A | Specifies the tolerance class, representing very high precision for both dimensional and running accuracy. |
S7215 CDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The optimized internal geometry, including a 15° contact angle and high-grade chrome steel components, provides high rigidity and enables the bearing to support significant combined radial and axial loads.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the extra light preload minimizes friction and heat generation. This design allows for a high limiting speed of 28,000 rpm, making it an excellent high-speed bearing.
- Precision Engineering: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and exceptional rotational accuracy, which is critical for applications like machine tool spindles.
- Sealed and Lubricated for Life: As a sealed bearing, it is pre-lubricated with grease, protecting against contamination and providing maintenance-free operation within its specified temperature range of -30°C to 110°C.
S7215 CDGA/P4A Bearing Typical Application Areas
The S7215 CDGA/P4A is engineered for high-performance applications, including:
- Machine Tool Spindles: High-precision milling, grinding, and turning centers.
- High-Speed Machining Centers
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Advanced Robotics and Automation
