S7008 ACEGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7008 ACEGB/P4A
Basic Information
System of measurement
Metric
Weight
0.19 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
25 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2632 lbf
Radial static load rating
1620 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
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S7008 ACEGB/P4A Bearing Product Overview & Core Advantages
The S7008 ACEGB/P4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As a single-row bearing with a 25° contact angle and Universal Matchable (SU) designation, it is engineered to handle combined radial and axial loads simultaneously. Manufactured to the stringent P4A tolerance class, it offers superior running accuracy, making it ideal for high-speed operation and high-rigidity applications. Its sealed design and factory-applied grease lubrication ensure long-term, maintenance-free performance.
S7008 ACEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| S7008 | Basic bearing series and size designation (40mm bore, 68mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| EGB | Optimized internal geometry and cage design for enhanced performance. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
S7008 ACEGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction provide high rigidity, enabling the bearing to support significant combined radial and axial loads.
- Superior High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 41,000 rpm. The optimized internal geometry further enhances high-speed stability.
- Exceptional Precision: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, ensuring minimal runout and vibration for ultra-precise applications.
- Universal Matching & Preload: As a Universal Matchable (SU) bearing with a Light (Class B) preload, it can be universally paired with another identical bearing in a back-to-back (DB) or face-to-face (DF) arrangement without selective matching, simplifying installation and achieving optimal stiffness.
- Maintenance-Free Operation: The integral seals and pre-applied grease lubrication effectively protect against contamination and provide reliable operation across a wide temperature range of -30°C to 110°C.
S7008 ACEGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Equipment: Coordinate measuring machines, optical scanners.
- High-Frequency Motors: Spindles for PCB drilling, dental handpieces.
- Robotics: High-accuracy joints and rotary actuators.
- Aerospace & Defense: Gyroscopes, radar systems, and navigation instruments.
