S7008 ACB/P4ADGB
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7008 ACB/P4ADGB
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
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2520 lbf
Radial static load rating
2385 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
Light / Class B
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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S7008 ACB/P4ADGB Bearing Product Overview & Core Advantages
The S7008 ACB/P4ADGB is a precision double row angular contact ball bearing engineered for applications demanding exceptional accuracy and rigidity. Its design enables it to simultaneously support significant combined loads (radial and bidirectional axial loads) in a compact envelope. Manufactured to the stringent P4A tolerance class, it guarantees superior running accuracy, making it an ideal choice for high-speed spindles and other high-reliability machinery where performance is critical.
S7008 ACB/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7008 | Basic bearing series designation. |
| ACB | Contact angle of 25° and Light Preload (Class B). |
| P4A | Indicates a high-precision tolerance class exceeding ABEC 7 standards. |
| DGB | The bearing is Universal Matchable (SU), allowing two bearings to be mounted in a universal arrangement (back-to-back, face-to-face, or tandem) without compromising preload or performance. |
S7008 ACB/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides superior radial and axial stiffness, enabling stable operation under heavy combined loads.
- Precision & High-Speed Performance: The P4A tolerance class ensures minimal runout and vibration. Combined with the lightweight phenolic cage, it facilitates smooth operation at the high limiting speed of 41,000 rpm.
- Optimized Internal Geometry: The 25° contact angle is optimized for supporting substantial axial loads in both directions.
- Sealed & Pre-Lubricated: As a sealed bearing pre-filled with grease lubrication, it is protected from contamination and is ready for immediate, long-term service within its specified temperature range (-30°C to 110°C).
S7008 ACB/P4ADGB Bearing Typical Application Areas
This bearing is ideally suited for demanding applications such as:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- High-Speed Pumps and Compressors
- Robotic Drives and Precision Instrumentation
