S7008 CB/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7008 CB/P4ADGA
Basic Information
System of measurement
Metric
Weight
0.42 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
30 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2678 lbf
Radial static load rating
2520 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Grease
Matched arrangement
Universal Matchable (SU)
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
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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Product Overview and Core Advantages
The S7008 CB/P4ADGA is a precision double row angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Engineered to simultaneously withstand combined radial and bidirectional axial loads, this bearing features a compact design ideal for high-precision, high-reliability machinery. Its P4A super-precision tolerance and universal matchable (SU) designation ensure superior running accuracy and simplified mounting in preloaded arrangements, making it a premier choice for high-speed spindle applications.
S7008 CB/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7008 | Basic bearing series, indicating a 40mm bore, 68mm OD, and 30mm width. |
| CB | Specific internal design and clearance for universal matching (SU), allowing any two bearings to be mounted together without selective assembly. |
| P4A | Tolerance class, denoting super-precision levels for both dimensional and running accuracy, superior to standard ABEC 7. |
| DGA | Lubrication designation, indicating the bearing is sealed and factory-filled with a specific high-performance grease. |
Structural Features and Performance Benefits
- High Rigidity and Load Capacity: The double row angular contact design provides a rigid support system capable of handling significant combined loads and bidirectional axial loads with a 15° contact angle, ensuring stable operation under demanding conditions.
- Super-Precision Performance: Manufactured to P4A tolerance class with an extra light preload (Class A), this bearing delivers minimal runout and vibration, which is critical for applications requiring extreme rotational accuracy.
- Optimized High-Speed Capability: The lightweight phenolic resin cage and optimized internal geometry contribute to a high limiting speed of 41,000 rpm, reducing centrifugal forces and friction for smooth, high-velocity operation.
- Sealed and Lubricated for Life: As a sealed bearing pre-lubricated with grease, it offers a maintenance-free solution with effective protection against contamination, suitable for a wide temperature range from -30°C to 110°C.
S7008 CB/P4ADGA Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles for CNC machining centers, grinders, and lathes
- High-Speed Spindles in PCB drilling and routing equipment
- Precision spindles for Industrial Pumps and Compressors
- Rotary tables and other precision positioning systems
- High-frequency motor spindles
