7008 FE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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7008 FE/HCP4ADGA Bearing Product Overview & Core Advantages
The 7008 FE/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universal matchable bearing features a P4A tolerance class and a phenolic resin cage, enabling superior high-speed capabilities and operational stability. Its 18° contact angle is optimized to handle significant combined radial and axial loads simultaneously. The use of ceramic balls reduces friction and heat generation, contributing to extended service life and reliability in precision machinery.
7008 FE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
| 7008 | Basic bearing series with 40mm bore, 68mm OD, 30mm width |
| FE | Filled with special high-performance lubricant |
| HC | Hybrid Ceramic construction with steel rings and ceramic balls |
| P4A | Ultra-precision tolerance class exceeding ABEC 7 standards |
| DGA | Universal matchable bearing set (two bearings) |
7008 FE/HCP4ADGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride ceramic balls provides superior performance with reduced friction, lower operating temperatures, and extended service life compared to all-steel bearings.
High-Speed Phenolic Cage: The phenolic resin cage offers excellent dimensional stability and strength at high rotational speeds, contributing to the impressive limiting speed of 56,000 rpm.
Precision Engineering: With P4A tolerance class and tight dimensional tolerances, this bearing ensures minimal runout and vibration for applications requiring extreme precision.
Universal Matchability: The SU universal matching designation allows for flexible bearing arrangements without the need for selective matching, simplifying installation and maintenance.
Optimized Load Capacity: The 18° contact angle and precision geometry enable efficient handling of combined loads with dynamic load rating of 4,388 lbf and static load rating of 3,375 lbf.
7008 FE/HCP4ADGA Bearing Typical Application Areas
- High-speed machine tool spindles and precision machining centers
- Medical equipment including dental handpieces and surgical tools
- Aerospace components requiring high reliability and precision
- Semiconductor manufacturing equipment and cleanroom applications
- High-frequency spindles for PCB drilling and milling
- Laboratory and analytical instrumentation requiring minimal vibration
