7004 CE/DGAVQ126
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/DGAVQ126 Bearing Product Overview & Core Advantages
The 7004 CE/DGAVQ126 is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As part of the Universal Matchable (SU) series, it is engineered to be paired with an identical bearing to form a pre-loaded duplex set, delivering superior stiffness and rotational accuracy. Its P4A tolerance class ensures ultra-precise dimensional control, making it ideal for high-speed spindles and other precision machinery where minimal runout and high rigidity are critical.
7004 CE/DGAVQ126 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing series and size designation (20mm bore, 42mm OD). |
| C | Specifies a 15° contact angle, optimized for high-speed operation and combined loads. |
| E | Indicates the bearing is Universal Matchable (SU), allowing for flexible mounting arrangements in duplex sets. |
| DGAVQ126 | A manufacturer-specific code denoting a pre-loaded duplex pair with Extra light (Class A) preload, ready for immediate installation to provide high system rigidity. |
7004 CE/DGAVQ126 Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The duplex pair configuration, pre-loaded at the factory, eliminates internal clearance, resulting in a system with extremely high stiffness and precise shaft positioning, crucial for applications like machine tool spindles.
Optimized Load Capacity: The 15° contact angle is engineered to efficiently handle combined radial and axial loads simultaneously, providing stable performance under complex loading conditions.
Superior High-Speed Performance: The lightweight phenolic resin cage ensures excellent dimensional stability and low friction at high rotational speeds, contributing to the bearing's high limiting speed of 63,000 rpm. The open design facilitates efficient lubrication and cooling.
Premium Materials: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue life and durability. The material selection ensures consistent performance within a wide temperature range from -30°C to 110°C.
7004 CE/DGAVQ126 Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers.
- High-Speed Motors: Spindles for PCB drilling and high-frequency motors.
- Precision Instrumentation: Measuring devices and optical scanners.
- Robotics: High-accuracy joints and arm assemblies.
