7004 ACE/HCP4BVG275
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7004 ACE/HCP4BVG275 Bearing Product Overview & Core Advantages
The 7004 ACE/HCP4BVG275 is a high-precision, single-row **Angular Contact Ball Bearing** engineered for demanding applications requiring exceptional accuracy and speed. Its defining feature is the **25° contact angle**, optimized to support significant **combined loads**—handling both radial forces and substantial axial loads in one direction. Manufactured to the stringent **P4 (ABEC-7) tolerance class**, this bearing guarantees superior running accuracy and rotational stability. The combination of a **ceramic ball** material and a lightweight **phenolic cage** significantly reduces centrifugal forces, enabling superior **high-speed performance** up to 58,000 rpm. Pre-lubricated for immediate operation, it is an ideal component for high-rigidity, high-reliability systems.
Model Code Breakdown
| Model Segment | Technical Meaning |
|---|---|
| 7004 | Standard series designation, indicating a 20mm bore, 42mm OD, and 12mm width. |
| ACE | Indicates a 25° contact angle and specific internal design optimized for high-speed operation and combined loads. |
| HC | Refers to the Hybrid Ceramic construction, featuring steel rings and ceramic balls. |
| P4 | Specifies the P4 (ABEC-7) tolerance class, denoting ultra-precision manufacturing standards. |
| BVG275 | Likely denotes a specific preload level and internal clearance group for optimal stiffness and performance. |
7004 ACE/HCP4BVG275 Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and available preload provide high axial and radial stiffness, making the bearing exceptionally resistant to deflection under combined loads.
- Superior High-Speed Performance: The hybrid ceramic design, with ceramic balls and a lightweight phenolic cage, minimizes friction, reduces heat generation, and allows for a very high limiting speed of 58,000 rpm.
- Precision and Longevity: Manufactured to P4 precision with tight bearing dimensions and bore/OD tolerances, it ensures smooth, quiet, and vibration-free operation, extending the service life of the entire assembly.
- Optimized for Demanding Environments: The open seal type allows for custom lubrication regimes, while the chrome steel rings and ceramic balls offer excellent performance within a temperature range of -30° to 110 °C.
7004 ACE/HCP4BVG275 Bearing Typical Application Areas
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Instrumentation
- High-Frequency Electric Spindles
- Robotics and Automation (Articulated arm joints)
- Aerospace and Defense Systems
