7008 ACE/P4ADGA
7000 Series Super Precision Angular Contact Ball Bearings
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7008 ACE/P4ADGA Bearing Product Overview & Core Advantages
The 7008 ACE/P4ADGA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. Engineered to simultaneously handle combined radial and axial loads, this bearing features a 25° contact angle and Extra Light preload (Class A), making it ideal for high-precision spindles and systems. Its P4A tolerance class ensures superior running accuracy, while the Universal Matchable (SU) designation allows for flexible mounting in preloaded pairs to achieve optimal system rigidity and performance.
7008 ACE/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7008 | Basic bearing series and size designation |
| ACE | Specific internal design and contact angle (25°) |
| P4A | High precision tolerance class (exceeding ABEC 7) |
| DGA | Indicates the bearing is lubricated and part of a universally matchable (SU) set |
7008 ACE/P4ADGA Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4A tolerance standards with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0), this bearing delivers exceptional running accuracy. The 25° contact angle and Extra Light preload provide superior system stiffness while minimizing friction and heat generation.
Optimized Load Capacity: The angular contact design efficiently supports combined radial and axial loads with a dynamic load rating of 4275 lbf and static load rating of 3218 lbf. The universal matching capability (SU) allows two bearings to be mounted in either back-to-back or face-to-face arrangements to handle complex loading conditions.
High-Speed Performance: Featuring a lightweight phenolic cage and precision-ground chrome steel balls (7.144 mm diameter, 19 balls), this bearing achieves a limiting speed of 56,000 rpm. The factory-applied lubrication ensures optimal performance across the operating temperature range of -30°C to 110°C.
7008 ACE/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- Precision Instrumentation - Measuring equipment and optical systems
- High-Speed Motors - Servo motors and spindle drives
- Aerospace Systems - Guidance systems and auxiliary power units
- Medical Equipment - Dental handpieces and laboratory automation
