S7208 CD/P4ADBC
Sealed Super Precision Angular Contact Ball Bearings
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S7208 CD/P4ADBC Bearing Product Overview & Core Advantages
The S7208 CD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and running accuracy. This back-to-back (DB) matched set delivers superior performance under combined radial and axial loads. Manufactured to P4A tolerance class and preloaded to Class C, it ensures minimal runout and high positional accuracy. Its compact design, featuring two bearings in a single unit, provides a highly rigid and stable solution for high-speed spindles and precision machinery.
S7208 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | High-precision bearing series |
| 208 | Standard bore (40 mm) & outside diameter (80 mm) designation |
| C | 15° contact angle |
| D | Duplex back-to-back (DB) arrangement |
| P4A | High precision tolerance class (superior to ABEC 7) |
| DBC | Specific preload designation (Moderate / Class C) |
S7208 CD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing moment rigidity and providing exceptional operational stability under complex loading conditions.
- Superior Load Capacity: Engineered with a 15° contact angle and optimized internal geometry, this bearing set efficiently handles combined radial and axial loads from both directions simultaneously.
- Precision & High-Speed Performance: The Phenolic cage offers excellent strength-to-weight ratio, contributing to lower centrifugal forces and smoother operation at the high limiting speed of 41,000 rpm. The P4A tolerance class ensures minimal vibration and precise shaft positioning.
- Optimized for Longevity: Factory-preloaded and grease lubricated for immediate use, this sealed unit is protected from contamination, offering reliable, maintenance-free operation within a temperature range of -30°C to 110°C.
S7208 CD/P4ADBC Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for applications requiring high rigidity, speed, and accuracy, including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Motor Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Gearboxes
