S7008 ACB/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7008 ACB/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.41 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
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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S7008 ACB/HCP4ADGA Bearing Product Overview & Core Advantages
The S7008 ACB/HCP4ADGA is a super-precision double row angular contact ball bearing engineered for the most demanding applications. Its primary advantage lies in its ability to simultaneously support combined loads (radial and bidirectional axial loads) with exceptional accuracy and rigidity. Featuring a universal matchable (SU) design, it allows for simplified mounting in various preload configurations. The combination of a ceramic ball material and a P4A tolerance class ensures ultra-high-speed capability, low heat generation, and outstanding operational precision, making it ideal for high-reliability, high-performance machinery.
S7008 ACB/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7008 | Denotes the bearing series and size (40mm bore, 68mm OD). |
| ACB | Indicates a 25° contact angle, optimized for supporting high axial loads. |
| HCP4A | Signifies the P4A super-precision tolerance class and the use of hybrid ceramic balls for superior performance. |
| DGA | Specifies the sealed design and the type of grease lubrication pre-applied. |
S7008 ACB/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design provides a rigid support system, enabling it to handle significant combined loads and moment loads effectively.
- Ultra-High-Speed Performance: The combination of a lightweight phenolic cage and low-friction ceramic balls significantly reduces centrifugal forces and operating temperature, allowing for a high limiting speed of 41,000 rpm.
- Super-Precision Operation: Manufactured to ABEC 7 / P4A tolerance standards with extremely tight dimensional runouts, ensuring minimal vibration and maximum running accuracy for critical spindles.
- Long Service Life & Reliability: The sealed construction retains grease and effectively excludes contaminants. The universal matchable (SU) feature ensures predictable performance and simplifies bearing arrangement assembly.
S7008 ACB/HCP4ADGA Bearing Typical Application Areas
This precision bearing is ideally suited for high-speed, high-precision equipment, including:
- Machine Tool Spindles (CNC milling, grinding, and turning centers)
- High-Frequency Machining Spindles
- Precision Robotics and Automation Arms
- High-Speed Motors and Turbomachinery
