7008 FE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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7008 FE/HCP4ADBA Bearing Product Overview & Core Advantages
The 7008 FE/HCP4ADBA is a precision angular contact ball bearing configured as a duplex back-to-back (DB) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing excels at handling combined radial and axial loads. Its P4A super-precision tolerance and ceramic ball construction make it an ideal solution for high-speed spindles and other critical machinery where minimal runout and thermal stability are paramount.
7008 FE/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing series and size designation (40mm bore, 68mm OD). |
| FE | Indicates a duplex back-to-back (DB) matched set of two bearings. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| A | Specifies an Extra Light preload for minimal friction and high-speed operation. |
7008 FE/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back arrangement provides a wide effective spread of the load centers, resulting in a very high moment stiffness. This configuration is exceptionally capable of supporting combined loads and moments.
Superior High-Speed Performance: The combination of hybrid ceramic balls and a lightweight phenolic resin cage significantly reduces centrifugal forces and operating temperatures. This allows the bearing to achieve its high limiting speed of 56,000 rpm with excellent stability.
Extended Service Life & Reliability: Ceramic balls are harder, lighter, and have a lower coefficient of thermal expansion than steel. This leads to reduced wear, longer bearing service life, and consistent performance across the specified temperature range.
Precision Engineering: Manufactured to P4A tolerance class with a precise 18° contact angle, this bearing ensures minimal vibration and exceptional running accuracy for demanding applications.
7008 FE/HCP4ADBA Bearing Typical Application Areas
- High-Speed Machine Tool Spindles (CNC milling, grinding, and jig boring machines)
- Precision Grinding Spindles
- High-Frequency Motors
- Aerospace & Defense Instrumentation
- Semiconductor Manufacturing Equipment
