7008 ACD/P4AQGB
7000 Series Super Precision Angular Contact Ball Bearings
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7008 ACD/P4AQGB Bearing Product Overview & Core Advantages
The 7008 ACD/P4AQGB is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-lubricated set of four, it enables simplified installation and optimal preload configuration. Its P4A tolerance class ensures ultra-precise running, making it ideal for high-speed spindles and other high-rigidity applications where combined loads must be managed with reliability.
7008 ACD/P4AQGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing series designation with 40mm bore, 68mm OD, and 60mm width. |
| ACD | 25° contact angle design optimized for high-speed performance and axial load capacity. |
| P4A | Ultra-precision tolerance class exceeding ABEC 7 standards for minimal runout. |
| QGB | Specialized grouping code indicating four universal matchable bearings supplied as a set. |
7008 ACD/P4AQGB Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional running accuracy and system stability.
Optimized Load Capacity: The 25° contact angle and phenolic cage enable effective handling of combined radial and axial loads, with a dynamic load rating of 9518 lbf and static load rating of 9338 lbf.
High-Speed Capability: The phenolic cage and optimized internal geometry support a limiting speed of 56,000 rpm, making it suitable for high-speed applications.
Universal Matching Design: As Universal Matchable (SU) bearings supplied in a set of four, they can be arranged in back-to-back, face-to-face, or tandem configurations to achieve the required preload and stiffness.
7008 ACD/P4AQGB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles requiring high rigidity and accuracy
- High-Speed Motors: Electric spindle motors and high-frequency motor applications
- Precision Instrumentation: Measuring equipment and laboratory instruments demanding minimal vibration
- Robotics: Joint and arm mechanisms requiring precise motion control and high-speed performance
- Aerospace Components: Auxiliary systems and control mechanisms where reliability and precision are critical
