7012 CEGA/HCP4AH1
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7012 CEGA/HCP4AH1
Basic Information
System of measurement
Metric
Weight
0.39 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
95 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3870 lbf
Radial static load rating
2902 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
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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7012 CEGA/HCP4AH1 Bearing Product Overview & Core Advantages
The 7012 CEGA/HCP4AH1 is a single row angular contact ball bearing engineered for applications demanding ultra-high precision and superior rotational accuracy. Positioned in the P4A super-precision tolerance class, this bearing is designed to handle high-speed operations with exceptional stability. Its core advantages include the ability to accommodate combined loads, with a primary focus on supporting high axial loads in one direction, making it ideal for precision spindles and other high-performance machinery. The use of a phenolic resin cage and ceramic balls contributes to lower friction, higher limiting speeds, and reduced weight, ensuring reliable performance in demanding conditions.
7012 CEGA/HCP4AH1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7012 | Standard bearing series number, indicating a 60mm bore, 95mm OD, and 18mm width. |
| CE | Contact angle of 15°. |
| GA | Indicates a Universal Matchable (SU) bearing, designed to be mounted in sets (in this case, a set of 3) to achieve specific preload and rigidity characteristics. |
| HC | Refers to the Hybrid Ceramic construction, featuring ceramic balls and a steel ring. |
| P4A | Denotes the super-precision tolerance class, exceeding ABEC 7 standards for exceptional running accuracy. |
| H1 | Signifies an Extra Light preload (Class A), optimized for minimal friction and very high-speed applications. |
7012 CEGA/HCP4AH1 Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends service life, especially at high speeds. This construction also offers benefits in electrically sensitive environments.
- High-Speed Phenolic Cage: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to the high limiting speed of 34,000 rpm. It provides superior strength and guidance under high acceleration.
- Precision & Rigidity: Manufactured to P4A tolerance class with a 15° contact angle, this bearing provides extremely low runout and high system rigidity, which is critical for maintaining accuracy in precision machining.
- Universal Matching (SU): This bearing is universally matchable, allowing for flexible arrangement in sets (e.g., back-to-back, face-to-face) to optimize preload and stiffness for the specific application without selective mounting.
7012 CEGA/HCP4AH1 Bearing Typical Application Areas
This high-precision angular contact bearing is ideally suited for applications where high speed, high accuracy, and high rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: For PCB drilling and semiconductor manufacturing equipment.
- Aerospace Gyroscopes and Instrumentation: Where reliability and precision under high rotational speeds are critical.
