7008 FE/HCP4AH1DT
Hybrid Ceramic Super Precision Bearings
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7008 FE/HCP4AH1DT Bearing Product Overview & Core Advantages
The 7008 FE/HCP4AH1DT is a high-precision angular contact ball bearing designed for demanding applications. Its core advantage lies in its duplex tandem (DT) arrangement, where two bearings are factory-matched and preloaded to function as a single, highly rigid unit. This configuration is engineered to handle primarily axial loads in one direction with exceptional stiffness and accuracy. Manufactured to a P4A tolerance class, it guarantees ultra-precise running accuracy and dimensional stability, making it ideal for high-speed spindles and other high-precision, high-rigidity machinery.
7008 FE/HCP4AH1DT Bearing Model Code Explained, Specifications & Naming Convention
- 7008: Basic series designation, indicating a metric angular contact ball bearing with a 40mm bore, 68mm OD, and 30mm width.
- FE: Signifies a specific internal design optimized for high-speed operation and precise preload.
- HC: Denotes the use of Hybrid Ceramic components (ceramic balls with steel rings).
- P4A: The tolerance class, specifying extremely tight dimensional and running accuracy standards.
- H1: Indicates a specific preload level applied to the bearing set.
- DT: Duplex Tandem arrangement. Two bearings are mounted in a series configuration to increase axial load capacity and rigidity in one direction.
7008 FE/HCP4AH1DT Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and provides superior performance at high speeds (limiting speed of 53,000 rpm). This construction also offers enhanced durability and longer service life.
Enhanced Rigidity & Load Capacity: The duplex tandem (DT) arrangement and applied preload create a system with very high axial and radial rigidity, capable of withstanding heavy combined loads with minimal deflection.
Phenolic Resin Cage: The lightweight and robust phenolic cage ensures stable operation at high rotational speeds and is well-suited for the demanding conditions of high-speed applications.
Superior Precision: The P4A tolerance class ensures minimal runout and precise rotational characteristics, which is critical for applications requiring the highest levels of accuracy.
7008 FE/HCP4AH1DT Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy robotic arms and joints.
- Aerospace & Defense Systems: Gyroscopes, avionics, and other critical rotating assemblies.
- High-Frequency Motors and Spindles: Motors and spindles operating at very high rotational speeds.
