7008 CE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7008 CE/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.34 kg
Tolerance class
P4A
Seal type
Open
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
7.144 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4478 lbf
Radial static load rating
3442 lbf
Limiting speed
43 X 1000 rpm
Lubrication
Lubricated
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
No drawings available at the moment, will be launched soon
Price:
$ 269.73
/ each
In Stock
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7008 CE/HCP4ADGA Bearing Product Overview & Core Advantages
The 7008 CE/HCP4ADGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This universal matchable bearing is designed to accommodate combined radial and axial loads simultaneously. Its P4A super-precision tolerance and ceramic ball construction deliver superior running accuracy, high rigidity, and extended service life, making it ideal for high-speed, high-reliability spindle applications.
7008 CE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| CE | Hybrid Ceramic (Ceramic balls with steel rings) | Reduced friction, higher speed capability, longer life, and electrical insulation. |
| HC | Hybrid Ceramic designation | Confirms the use of silicon nitride (Si3N4) ceramic balls. |
| P4A | Super Precision Tolerance Class | Exceeds ABEC 7/ISO P4 standards, ensuring minimal runout and vibration for ultra-precise rotation. |
| A | Extra Light Preload | Provides optimal bearing stiffness and positional accuracy with minimal heat generation. |
| SU | Universal Matchable | Any two bearings can be paired in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement without selective matching. |
7008 CE/HCP4ADGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The combination of chrome steel rings and silicon nitride ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables a limiting speed of 43,000 rpm. This construction also provides electrical insulation, preventing damage from stray currents.
- Phenolic Resin Cage: The phenolic cage offers excellent dimensional stability at high speeds, low weight for reduced inertia, and superior compatibility with lubrication systems.
- 15° Contact Angle & Universal Matching: The 15° contact angle is optimized for high-speed operation while maintaining good axial load capacity. The universal matchable (SU) feature simplifies installation and inventory management for preloaded bearing sets.
- Super-Precision P4A Tolerance: Manufactured to P4A tolerance class, this bearing guarantees extreme dimensional and running accuracy, which is critical for minimizing vibration and achieving superior finish in machining applications.
7008 CE/HCP4ADGA Bearing Typical Application Areas
This bearing is specifically designed for high-performance machinery where speed, precision, and rigidity are paramount.
- Machine Tool Spindles: High-speed CNC milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving, and high-frequency motor spindles.
- Medical Equipment: Dental handpieces and high-speed surgical tools.
- Aerospace & Defense: Gyroscopes, navigation systems, and radar equipment.
