S7008 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7008 CEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.17 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.004mm to 0
Width
15 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2790 lbf
Radial static load rating
1721 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S7008 CEGA/HCP4A Bearing Product Overview & Core Advantages
The S7008 CEGA/HCP4A is a high-precision, double row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and reliability. Its primary advantage lies in its ability to simultaneously support substantial combined loads—both radial and bidirectional axial loads—within a compact cross-section. Manufactured to a P4A super-precision tolerance and featuring a ceramic ball construction, this bearing is optimized for high-speed operation and delivers superior rigidity and long-term performance.
S7008 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| S7008 | Series designation for a double row, super-precision angular contact ball bearing. |
| CE | Indicates a 15° contact angle and specific internal design. |
| GA | Specifies an Extra Light (Class A) preload for minimal friction and high-speed capability. |
| HC | Denotes the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Identifies the tolerance class, signifying super-precision running accuracy. |
S7008 CEGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides a rigid support system, enabling the bearing to handle significant combined loads and moment loads effectively.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage, ceramic balls (which reduce centrifugal forces), and a light preload allows for a very high limiting speed of 41,000 rpm.
- Extended Service Life & Reliability: Hybrid ceramic construction offers excellent wear resistance, electrical insulation, and the ability to operate with minimal lubrication. The bearings are universally matchable (SU), allowing for precise preload control when mounted in pairs.
- Precision & Accuracy: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, ensuring smooth, quiet, and vibration-free operation.
S7008 CEGA/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision, speed, and reliability are paramount. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Robotics: In robot arm joints and gears requiring high rigidity and accuracy.
- High-Frequency Motors & Spindles: Used in PCB drilling spindles and dental handpieces.
- Aerospace & Defense Systems: In gyroscopes, navigation systems, and other critical instrumentation.
