7008 CE/HCDTVQ126
Hybrid Ceramic Super Precision Bearings
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7008 CE/HCDTVQ126 Bearing Product Overview & Core Advantages
The 7008 CE/HCDTVQ126 is a precision angular contact ball bearing designed for demanding applications requiring exceptional speed and rigidity. Engineered as a matched duplex tandem (DT) set, this bearing is preloaded to deliver superior axial and radial stiffness right from installation. Its construction, featuring a phenolic cage and ceramic balls, is optimized for high-speed operation and extended service life under combined loads. This bearing is pre-lubricated and built to the exacting P4A tolerance class, making it an ideal choice for high-precision, high-reliability machinery.
7008 CE/HCDTVQ126 Bearing Model Code Explained, Specifications & Naming Convention
- 7008: Basic series number, indicating a 40mm bore, 68mm outside diameter, and 30mm width.
- CE: Indicates a 15° contact angle and enhanced internal design for high-speed performance.
- HC: Denotes the use of Hybrid Ceramic balls (Silicon Nitride).
- DT: Signifies a Duplex Tandem preloaded pair. This arrangement increases axial load capacity and rigidity in one direction.
- V: Identifies the cage material as Phenolic (Vulkollan®/Polyamide).
- Q126: Specifies a special internal clearance and preload grouping for precision matching.
7008 CE/HCDTVQ126 Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The duplex tandem (DT) arrangement of two bearings creates a highly rigid system capable of withstanding significant combined radial and axial loads in one direction. The built-in preload eliminates internal clearance, ensuring precise shaft positioning and minimal deflection.
Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density, hard ceramic balls reduces centrifugal forces and operating temperatures, enabling a high limiting speed of 43,000 rpm. The 15° contact angle is optimized for high-speed applications with predominant axial loads.
Enhanced Durability and Precision: Manufactured to P4A tolerance class, this bearing guarantees extremely tight dimensional and running accuracy. The hybrid ceramic construction offers excellent resistance to wear and a longer operational life, especially in challenging environments.
7008 CE/HCDTVQ126 Bearing Typical Application Areas
This high-performance bearing is ideally suited for applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Spindles: In PCB drilling, dental handpieces, and other small, high-speed tools.
- High-Frequency Motors: Where low friction and high rotational accuracy are required.
- Aerospace and Defense Systems: Including gyroscopes, actuators, and auxiliary power units.
