7004 CE/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7004 CE/P4A Bearing Product Overview & Core Advantages
The 7004 CE/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it delivers superior running accuracy. Its key advantage lies in its ability to accommodate combined loads, specifically high axial loads in one direction alongside radial loads, making it ideal for applications demanding high stiffness and precise shaft positioning. The phenolic cage and optimized internal geometry contribute to its high-speed capabilities.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing series and size designation (20mm bore, 42mm OD, 12mm width). |
| C | Designates a 15° contact angle, optimized for high axial load capacity. |
| E | Indicates a reinforced or optimized internal design. |
| P4 | Specifies the high-precision tolerance class (equivalent to ABEC-7). |
| A | Signifies that the bearing is supplied with a specific preload for enhanced rigidity. |
7004 CE/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Axial Load Capacity: The 15° contact angle and robust internal geometry are engineered to support significant one-direction axial loads and radial loads simultaneously, providing high system stiffness and minimizing shaft deflection under load.
High-Speed Performance: The lightweight and durable phenolic resin cage ensures stable operation and reduced centrifugal forces, enabling a high limiting speed of 83,000 rpm. The open design facilitates efficient lubrication management at high rotational speeds.
Precision Engineering: Manufactured to P4 tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications requiring ultra-precise rotational motion.
Material Quality: Components made from high-grade chrome steel provide excellent wear resistance and long service life under demanding operating conditions.
7004 CE/P4A Bearing Typical Application Areas
The 7004 CE/P4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Robotic Drives and Actuators
- Medical and Dental Equipment
- Aerospace Control Systems
