S7008 CEGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7008 CEGA/P4A Bearing Product Overview & Core Advantages
The S7008 CEGA/P4A is a high-precision double row angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to accommodate combined radial and axial loads simultaneously from both directions, this bearing features a compact cross-section and is manufactured to P4A super-precision tolerance standards. Its sealed design and pre-lubrication ensure long-term, maintenance-free operation, making it an ideal solution for high-speed spindles and other precision machinery where reliability is paramount.
S7008 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7008 | Bearing Series & Size | Denotes a 40mm bore, 68mm OD double row angular contact ball bearing. |
| CE | Contact Angle & Design | Specifies a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| GA | Preload & Matching | Indicates Extra Light (Class A) preload and that the bearing is Universal Matchable (SU), allowing for precise axial play adjustment when paired. |
| P4A | Tolerance Class | Signifies super-precision manufacturing tolerances for runout and dimensions, ensuring smooth, vibration-free performance at high speeds. |
S7008 CEGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double row ball bearing design provides superior radial and axial rigidity, enabling stable support for spindles under combined loads. With a 15° contact angle, it efficiently handles significant axial loads from both directions.
Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, while the precision-ground chrome steel balls and raceways reduce friction and heat generation. This construction, combined with the extra light preload, allows the bearing to achieve its high limiting speed of 41,000 rpm.
Maintenance-Free Operation: As a sealed bearing pre-lubricated with grease, it is protected from contamination and retains lubrication over a wide temperature range (-30°C to 110°C). This sealed design eliminates the need for re-lubrication, reducing maintenance costs and downtime.
S7008 CEGA/P4A Bearing Typical Application Areas
The S7008 CEGA/P4A is engineered for high-performance applications where precision, speed, and reliability are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling heads.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Speed Motors and Drives: Electric spindles, servo motors, and high-frequency drives.
- Aerospace and Defense Systems: Gyroscopes, radar equipment, and navigation systems.
