7000 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7000 CEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.017 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
10 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
26 mm
Outside diameter tolerance
-0.004mm to 0
Width
8 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
11
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
680 lbf
Radial static load rating
266 lbf
Limiting speed
140 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
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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7000 CEGA/HCP4A Bearing Product Overview & Core Advantages
The 7000 CEGA/HCP4A is a single-row angular contact ball bearing engineered for ultra-high precision applications requiring exceptional rotational accuracy and speed capabilities. This bearing features a P4A super-precision tolerance class and is manufactured with ceramic balls and a phenolic resin cage, making it ideally suited for machine tool spindles and other high-performance machinery. Its design is optimized to handle significant combined loads (radial and axial) simultaneously while operating at very high speeds with minimal heat generation and wear.
7000 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7000 | Basic bearing series, indicating a metric, single-row angular contact design with a 10mm bore. |
| CEGA | Internal bearing design code, specifying enhanced internal geometry and performance characteristics. |
| HC | Hybrid Ceramic: Denotes the use of ceramic balls (typically Silicon Nitride) in a steel ring structure. |
| P4A | The tolerance class, indicating super-precision levels exceeding ABEC 7, with very tight running accuracy and dimensional control. |
7000 CEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of steel rings and ceramic balls significantly reduces friction, heat buildup, and wear. This results in a higher limiting speed (140,000 rpm), extended service life, and the ability to run with minimal lubrication.
- Phenolic Resin Cage: This lightweight and robust cage material contributes to smooth operation at high speeds, offers excellent dimensional stability, and is suitable for a wide operating temperature range.
- 15° Contact Angle & Preload: The angular contact design with an extra light preload (Class A) is optimized for high-speed applications, providing high rigidity and precise axial positioning while minimizing torque and heat generation.
- Super-Precision P4A Tolerance: Ensures extremely low runout and vibration, which is critical for applications demanding the highest levels of accuracy and surface finish.
- Universal Matchable (SU): These bearings are supplied as a matched set of 2 and are universal matchable, allowing for flexible mounting configurations (back-to-back, face-to-face, or tandem) to handle complex load conditions.
7000 CEGA/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for the most demanding high-speed and high-precision applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and spindle drives requiring high rigidity and accuracy.
- High-Frequency Motors and Spindles: Where extreme rotational velocities are necessary.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and other critical rotating assemblies.
- Medical Equipment: Dental handpieces and surgical drill spindles.
