7008 ACE/HCP4ADT
Hybrid Ceramic Super Precision 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 ACE/HCP4ADT Bearing Product Overview & Core Advantages
The 7008 ACE/HCP4ADT is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional speed and rigidity. This duplex tandem (DT) arrangement features two bearings pre-loaded and matched to operate as a single, highly rigid unit. Its core advantages include the ability to handle significant combined loads (radial and axial), superior high-speed performance enabled by a phenolic cage and ceramic balls, and outstanding operational accuracy due to its P4A tolerance class. This configuration is ideal for applications where maximum axial stiffness and positional accuracy are critical.
7008 ACE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
- 7008: Basic designation indicating a 40mm bore, 68mm OD, and 30mm width.
- A: Denotes a 25° contact angle, optimized for carrying high axial loads.
- CE: Indicates the use of Ceramic (Si3N4) balls, which reduce centrifugal forces, lower operating temperature, and enable higher speeds.
- HC: Stands for a Phenolic (Polyamide) cage, which is lightweight and ideal for high-speed operation.
- P4A: Specifies a super-precision tolerance class (superior to ABEC 7), ensuring extremely tight running accuracy and minimal runout.
- DT: Identifies the bearing as part of a Duplex Tandem pre-loaded set. This arrangement increases axial load capacity and rigidity.
7008 ACE/HCP4ADT Bearing Structural Features & Performance Benefits
Enhanced Rigidity and Load Capacity: The duplex tandem (DT) arrangement combines two bearings to create an exceptionally stiff system, capable of withstanding heavy combined loads and providing precise axial positioning.
Superior High-Speed Performance: The combination of ceramic balls and a lightweight phenolic cage significantly reduces rotational mass and centrifugal forces. This allows the bearing to achieve a high limiting speed of 56,000 rpm with minimal heat generation.
Precision Engineering: Manufactured to a P4A tolerance class, this bearing guarantees ultra-precise running accuracy, low vibration, and high rotational stability, which is essential for precision machinery.
Pre-Lubricated for Immediate Use: The bearing comes pre-lubricated, ensuring optimal performance from the first rotation and simplifying the installation process.
7008 ACE/HCP4ADT Bearing Typical Application Areas
This high-performance bearing is ideally suited for applications requiring high speed, high rigidity, and superior precision, such as:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotics (Articulated arm joints, high-accuracy actuators)
- High-Frequency Motors and Spindles
- Aerospace & Defense Systems (Gyroscopes, navigation systems)
- Medical Equipment (Dental handpieces, high-speed centrifuges)
