S7008 CD/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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S7008 CD/P4ADBB Bearing Product Overview & Core Advantages
The S7008 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back arrangement provides superior stability and is preloaded to Light / Class B specifications, ensuring minimal axial and radial play under operating conditions. Its primary advantage lies in its ability to handle combined radial and axial loads simultaneously, making it an ideal solution for high-precision, high-reliability machinery where uncompromising performance is critical.
S7008 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7008 | Basic bearing series, indicating a metric, 40mm bore angular contact ball bearing. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| D | Indicates the bearing is part of a duplex (matched) set. |
| P4A | Denotes an ultra-high precision tolerance class, exceeding standard ABEC 7/ISO P4 levels for superior running accuracy. |
| DB | Specifies the Back-to-Back (DB) mounting arrangement, which provides high moment rigidity. |
| Sealed / Grease | The bearing is sealed and pre-lubricated with grease, offering protection from contaminants and enabling long-term, maintenance-free operation. |
S7008 CD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) design creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise alignment and smooth operation.
Superior Load Capacity: Engineered with a 15° contact angle and high-grade chrome steel components, this bearing is capable of supporting significant combined radial and axial loads.
Optimized High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, reduces friction, and contributes to the high limiting speed of 41,000 rpm. The precision P4A tolerances further ensure low vibration and quiet running at high velocities.
Maintenance-Free Operation: As a sealed and pre-greased unit, it is protected from contamination and is lubricated for life under normal operating conditions within its specified temperature range of -30°C to 110°C.
S7008 CD/P4ADBB Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for demanding applications, including:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Gearboxes and Drives
- Robotic Arm Joints and Precision Positioning Systems
- Medical and Laboratory Equipment requiring high-speed and accuracy
