7004 CE/HCDGAVQ126
Hybrid Ceramic Super Precision Bearings
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7004 CE/HCDGAVQ126 Bearing Product Overview & Core Advantages
The 7004 CE/HCDGAVQ126 is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universal matchable (SU) bearing features a P4A tolerance class and ceramic balls, delivering superior rotational accuracy and reliability. Its 15° contact angle and extra light preload (Class A) enable it to handle combined radial and axial loads simultaneously, making it ideal for high-speed, high-rigidity applications where precise shaft positioning is critical.
7004 CE/HCDGAVQ126 Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| CE | 15° Contact Angle | Optimized for combined loads and high-speed operation |
| HC | Hybrid Ceramic Balls | Reduced friction, higher speed capability, and longer service life |
| DG | Universal Matchable (SU) | Can be paired in any combination without loss of preload |
| AV | Extra Light Preload (Class A) | Minimal friction with high running accuracy |
| Q126 | Phenolic Cage Design | Lightweight cage suitable for high-speed applications |
7004 CE/HCDGAVQ126 Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces friction, heat generation, and wear, enabling higher limiting speeds (63,000 rpm) and extended service life compared to all-steel bearings.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore diameter tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for superior rotational accuracy.
Optimized Load Capacity: The 15° contact angle and 12 ceramic balls provide excellent combined load capacity (radial dynamic: 2722 lbf, static: 1508 lbf) while maintaining high rigidity.
High-Speed Capability: The phenolic cage offers excellent strength-to-weight ratio and compatibility with high rotational speeds, while the open design facilitates efficient lubrication.
7004 CE/HCDGAVQ126 Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles
- High-Speed Motors: Servo motors, spindle motors, and high-frequency applications
- Precision Instruments: Measuring equipment, optical devices, and laboratory instruments
- Aerospace Systems: Guidance systems, actuators, and auxiliary power units
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
