7008 ACD/HCP4ADGC
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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7008 ACD/HCP4ADGC Bearing Product Overview & Core Advantages
The 7008 ACD/HCP4ADGC is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. This universal matchable (SU) bearing features a 25° contact angle and ceramic ball construction, delivering superior performance in high-speed and high-temperature environments. Its P4A tolerance class ensures ultra-precise dimensional control, making it ideal for machine tool spindles and other precision equipment where minimal runout and vibration are critical.
7008 ACD/HCP4ADGC Bearing Model Code Explained, Specifications & Naming Convention
- 7008: Basic bearing series with 40mm bore, 68mm OD, 30mm width
- A: 25° contact angle design
- CD: Universal matchable bearing (can be paired in any combination)
- HC: Hybrid Ceramic construction (steel rings with ceramic balls)
- P4A: Ultra-precision tolerance class exceeding ABEC 7 standards
- ADGC: Specific internal design and preload specification
7008 ACD/HCP4ADGC Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings with silicon nitride ceramic balls provides exceptional performance characteristics including reduced friction, higher operating speeds, and extended service life in demanding conditions.
High-Speed Capability: With a limiting speed of 56,000 rpm and phenolic resin cage, this bearing maintains stability at extreme rotational velocities while providing excellent acceleration characteristics.
Precision Performance: The P4A tolerance class ensures minimal dimensional variation, while the moderate preload (Class C) delivers consistent rotational accuracy and stiffness for precision applications.
Universal Matching Design: As a Universal Matchable (SU) bearing, multiple units can be paired in any combination to create optimized bearing arrangements for specific load and stiffness requirements.
7008 ACD/HCP4ADGC Bearing Typical Application Areas
This high-precision angular contact bearing is specifically designed for applications requiring exceptional speed capability and accuracy:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Medical Equipment: Dental handpieces, surgical tools
- Aerospace Systems: Gyroscopes, navigation equipment
- High-Speed Automation: Robotics, pick-and-place systems
- Semiconductor Manufacturing: Wafer handling, precision positioning stages
