7008 ACDGC/P4A
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7008 ACDGC/P4A Bearing Product Overview & Core Advantages
The 7008 ACDGC/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior running accuracy. Operating under a P4A tolerance class and featuring a 25° contact angle, this bearing is optimized to handle significant combined loads—primarily thrust loads in one direction along with radial loads. Its Moderate (Class C) preload ensures high system rigidity and minimizes axial and radial play, making it ideal for high-speed spindles and other precision machinery where positional accuracy is critical. The phenolic cage and universal matching capability further enhance its performance in complex, high-demand arrangements.
7008 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
- 7008: Basic designation indicating a metric series angular contact bearing with a 40mm bore and 68mm outside diameter.
- AC: Angular Contact design, with a contact angle suitable for combined loads.
- D: Signifies a specific internal design and contact angle (25° in this case).
- GC: Indicates a specific preload class—in this instance, Moderate / Class C preload for optimal rigidity and running accuracy.
- P4A: Denotes an extremely high precision tolerance class, exceeding ABEC 7 standards, which guarantees tight dimensional and running accuracy tolerances.
7008 ACDGC/P4A Bearing Structural Features & Performance Benefits
The performance of the 7008 ACDGC/P4A is a direct result of its refined construction. The 25° contact angle and single-row design are optimized for high thrust load capacity in one direction. The Moderate (Class C) preload eliminates internal clearance, resulting in exceptional system rigidity and precise shaft positioning, which is crucial for minimizing vibration and deflection at high speeds. The lightweight phenolic resin cage contributes to lower inertial forces, enabling a high limiting speed of 56,000 rpm and smooth operation. Manufactured to a P4A precision tolerance from high-grade chrome steel, this bearing ensures consistent, reliable performance and long service life in demanding applications.
7008 ACDGC/P4A Bearing Typical Application Areas
This high-precision angular contact bearing is specifically designed for advanced machinery where speed, accuracy, and rigidity are paramount. Typical applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for electric motors requiring high rotational accuracy.
- Robotics: High-precision joints and arm actuators.
- Medical Equipment: Dental handpieces and imaging device rotors.
