7004 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
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7004 CE/HCP4A Bearing Product Overview & Core Advantages
The 7004 CE/HCP4A is a high-precision single row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This precision bearing is distinguished by its P4 (ABEC-7) tolerance class, ensuring minimal runout and superior rotational accuracy. Its 15° contact angle is optimized to handle combined loads, efficiently supporting significant thrust loads in one direction alongside radial loads. The use of a phenolic cage and ceramic balls contributes to lower friction, higher limiting speeds, and extended service life, making it an ideal solution for high-speed, high-rigidity spindle systems.
7004 CE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Standard bearing series number, indicating a 20mm bore, 42mm OD, and 12mm width. |
| C | Designates a 15° contact angle. |
| E | Indicates optimized internal geometry and enhanced design for improved performance. |
| HC | Signifies the use of Hybrid Ceramic components (ceramic balls with steel rings). |
| P4 | Denotes the high-precision tolerance class (equivalent to ABEC-7). |
| A | Indicates that the bearing is supplied with a specific preload for immediate high-rigidity performance. |
7004 CE/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, operating temperature, and wear. This results in a higher limiting speed (100,000 rpm) and longer service life compared to all-steel bearings.
High Rigidity & Preload: The bearing is supplied with a preload, which eliminates internal clearance. This provides maximum system rigidity, reduces vibration, and improves positional accuracy, which is critical for machining and precision applications.
Superior High-Speed Performance: The lightweight phenolic resin cage offers excellent dimensional stability and low friction at high speeds, complementing the advantages of the ceramic balls to enable ultra-high rotational performance.
Precision & Load Capacity: Manufactured to P4 tolerance, this bearing ensures smooth and precise operation. Its design is capable of handling combined loads effectively, with a dynamic load rating of 1667 lbf and a static load rating of 754 lbf.
7004 CE/HCP4A Bearing Typical Application Areas
The 7004 CE/HCP4A is designed for high-performance applications where speed, precision, and reliability are paramount. Key industries and equipment include:
- High-Speed Machine Tool Spindles: For CNC milling, grinding, and drilling centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- Medical Equipment: High-speed dental handpieces and surgical drill spindles.
- Turbochargers and High-Speed Compressors: Where extreme rotational speeds are required.
