S7008 CEGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7008 CEGB/HCP4A
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
15 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2790 lbf
Radial static load rating
1721 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
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S7008 CEGB/HCP4A Bearing Product Overview & Core Advantages
The S7008 CEGB/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This sealed bearing features a universal matchable (SU) design, allowing two bearings to be paired for optimal preload and performance. Its construction with ceramic balls and a phenolic cage enables superior high-speed performance and reduced weight. Engineered to handle combined loads (radial and axial), it offers outstanding operational reliability in precision machinery.
S7008 CEGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7008 | Standard bearing series designation with 40mm bore. |
| C | 15° contact angle. |
| E | Optimized internal design for enhanced load capacity. |
| GB | Grease lubrication with sealing. |
| HC | Hybrid Ceramic (Ceramic balls with steel rings). |
| P4A | High precision tolerance class (superior to ABEC 7). |
S7008 CEGB/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces centrifugal forces, lowers operating temperature, and enables a limiting speed of 41,000 rpm. This construction also provides electrical insulation and extended service life.
- Phenolic Resin Cage: The lightweight and robust phenolic cage contributes to smooth operation at high speeds and offers excellent dimensional stability.
- Universal Matchable (SU) Design: This feature allows two bearings to be universally mounted face-to-face, back-to-back, or in tandem, providing flexibility in achieving the required preload and system rigidity.
- Sealed & Grease-Lubricated: The integrated seals protect against contamination and retain grease, making the bearing maintenance-free for its entire service life within the specified temperature range of -30°C to 110°C.
- High Load Capacity: With a dynamic load rating of 2790 lbf and a static load rating of 1721 lbf, this bearing is engineered to handle significant combined radial and axial loads.
S7008 CEGB/HCP4A Bearing Typical Application Areas
This high-performance bearing is ideally suited for applications where high speed, precision, and rigidity are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling and grinding spindles.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Aerospace & Defense: Gyroscopes, radar systems, and flight control mechanisms.
- High-Frequency Motors and Spindles
