7004 CE/HCP4AH1DGA
Hybrid Ceramic Super Precision Bearings
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7004 CE/HCP4AH1DGA Bearing Product Overview & Core Advantages
The 7004 CE/HCP4AH1DGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered with ceramic balls and manufactured to P4A super-precision tolerance, this bearing delivers superior rotational accuracy, reduced friction, and extended service life. Its 15° contact angle and universal matchable (SU) design enable it to handle combined radial and axial loads efficiently while maintaining high rigidity. Preloaded with extra light (Class A) preload, it ensures minimal deflection and optimal performance in high-speed applications up to 100,000 rpm.
7004 CE/HCP4AH1DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing series with 20mm bore, 42mm OD, 24mm width |
| CE | Ceramic balls (hybrid construction) |
| HC | Phenolic resin cage |
| P4A | Super precision tolerance class (ABEC 7 equivalent) |
| H1 | Preload code: Extra light (Class A) |
| DGA | Universal matchable bearing (SU designation) |
7004 CE/HCP4AH1DGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces friction, heat generation, and wear, while providing electrical insulation and corrosion resistance. This enables higher limiting speeds and extended service life.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring exceptional running accuracy and minimal vibration for precision applications.
Optimized Cage Design: The phenolic resin cage offers excellent strength-to-weight ratio, reduced centrifugal forces, and superior performance at high speeds while being compatible with various lubricants.
Universal Matching Capability: As a universal matchable (SU) bearing, it can be paired with any bearing of the same type in any combination to achieve required preload and stiffness without selective matching.
High-Speed Performance: The combination of ceramic balls, phenolic cage, and optimized internal geometry enables operation at 100,000 rpm limiting speed, making it ideal for high-speed spindles and precision machinery.
7004 CE/HCP4AH1DGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines
- High-Speed Motors: Servo motors, spindle motors, and high-frequency electric motors
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory devices
- Aerospace Components: Gyroscopes, navigation systems, and aircraft instrumentation
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
- Robotics: Precision robotic joints and automation equipment requiring high accuracy and speed
