S7008 CD/HCP4ADGC
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7008 CD/HCP4ADGC
Basic Information
System of measurement
Metric
Weight
0.34 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
7.938 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
6210 lbf
Radial static load rating
4950 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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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S7008 CD/HCP4ADGC Bearing Product Overview & Core Advantages
The S7008 CD/HCP4ADGC is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. This universal matchable (SU) bearing features a moderate preload (Class C) and is supplied as a matched set of two bearings, enabling simplified installation and optimal performance. Its design is optimized to handle combined radial and axial loads simultaneously, making it an ideal solution for high-speed spindles and precision machinery where high rigidity and operational reliability are paramount.
S7008 CD/HCP4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| S7008 | Basic bearing series and size designation (40mm bore, 68mm OD). |
| C | Specifies a 15° contact angle. |
| D | Indicates a moderate preload (Class C). |
| HC | Refers to the phenolic (Hybrid Composite) cage material. |
| P4A | Denotes an ultra-high precision tolerance class (superior to ABEC 7). |
| DGC | Signifies the bearing is universal matchable (SU) and supplied as a grease-lubricated, sealed unit. |
S7008 CD/HCP4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and matched set arrangement provide superior stiffness, enabling the bearing to effectively support combined loads and moment loads with high stability.
- High-Speed Performance: The lightweight phenolic cage and ceramic balls reduce centrifugal forces, significantly contributing to a high limiting speed of 41,000 rpm. This makes it a premier high-speed bearing.
- Precision & Longevity: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration. The combination of sealed construction and pre-applied grease lubrication offers long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
- Universal Matchability (SU): As a universally matchable bearing, any two bearings from this series can be paired in a duplex set without selective matching, simplifying inventory and assembly processes.
S7008 CD/HCP4ADGC Bearing Typical Application Areas
This precision bearing is ideally suited for applications demanding high speed, accuracy, and rigidity, including:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Motors
- Aerospace & Defense Instrumentation
