7012 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7012 CD/HCP4A Bearing Product Overview & Core Advantages
The 7012 CD/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and speed capability. Designed to accommodate combined loads (radial and axial loads in one direction), this bearing features a 15° contact angle and is manufactured to P4 (ABEC-7) tolerance class for superior running accuracy. Its construction with a phenolic cage and ceramic balls enables high-speed operation up to 26,000 rpm, making it ideal for demanding, high-performance machinery where rigidity and precision are paramount.
7012 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7012 | Standard bearing series designation, indicating a metric angular contact bearing with a 60mm bore, 95mm OD, and 18mm width. |
| C | Designates a 15° contact angle, optimized for high-speed applications. |
| D | Indicates that the bearing is supplied with a specific preload for enhanced rigidity and precise shaft positioning. |
| HC | Signifies the use of Hybrid Ceramic components, specifically ceramic balls, which reduce friction, heat generation, and allow for higher limiting speeds. |
| P4 | Specifies the tolerance class P4 (ABEC-7), denoting ultra-precision manufacturing for minimal runout and vibration. |
| A | Denotes that the bearing has a 30° contact angle. (Note: This appears to be a discrepancy in the provided data. The specification lists a 15° contact angle, which is typically designated by "C". Please verify the specific bearing configuration with technical documentation.) |
7012 CD/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces centrifugal forces and friction, enabling the bearing to achieve a high limiting speed of 26,000 rpm. This hybrid design also offers improved resistance to wear and a longer service life.
High Rigidity & Preload: The bearing is supplied with a preload, which eliminates internal clearance. This results in greater system rigidity, improved shaft guidance, and reduced noise and vibration levels under operational loads.
Precision & Accuracy: Manufactured to a P4 tolerance class, this bearing ensures extremely tight dimensional and running accuracy, which is critical for applications requiring high rotational precision.
Phenolic Cage: The lightweight and robust phenolic resin cage is ideal for high-speed operation, providing excellent dimensional stability and low friction at elevated rotational speeds.
7012 CD/HCP4A Bearing Typical Application Areas
The 7012 CD/HCP4A is ideally suited for high-performance machinery where speed, precision, and rigidity are non-negotiable. Common applications include:
- Machine Tool Spindles: For high-speed milling, drilling, and grinding spindles.
- Precision Robotics: In robotic arm joints and actuators requiring high accuracy and responsiveness.
- High-Frequency Motors & Spindles: Used in motors for CNC machinery and PCB drilling.
- Aerospace & Defense Systems: In gyroscopes, navigation systems, and other critical rotating assemblies.
- Medical Equipment: For dental handpieces and high-speed surgical tools.
