7008 ACE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7008 ACE/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.34 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
68 mm
Outside diameter tolerance
-0.004mm to 0
Width
30 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
19
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4275 lbf
Radial static load rating
3218 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 218.44
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7008 ACE/HCP4ADGA Bearing Product Overview & Core Advantages
The 7008 ACE/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered with ceramic balls and manufactured to P4A super-precision tolerance, this bearing delivers superior rotational accuracy, reduced friction, and extended service life. Its universal matchable (SU) design allows for flexible mounting in preloaded arrangements, providing high rigidity and the ability to handle combined loads (radial and axial) simultaneously. The phenolic cage ensures smooth operation at high speeds, making it an ideal solution for high-performance machinery.
7008 ACE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7008 ACE/HCP4ADGA provides detailed technical specifications through its suffixes:
- 7008: Basic bearing series, indicating a 40mm bore, 68mm OD, and 30mm width.
- A: Denotes a 25° contact angle, optimized for carrying significant axial loads. li>C: Indicates the use of ceramic (Si3N4) balls for higher speed capability and reduced wear.
- E: Signifies a high-capacity, optimized internal geometry.
- HC: Stands for a phenolic (polyamide) cage, enabling superior high-speed performance.
- P4A: Identifies the tolerance class, representing ultra-high precision with strict runout and dimension controls.
- ADGA: Specifies a universal matchable (SU) bearing set with an extra light preload (Class A).
7008 ACE/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design and universal matching capability allow the bearing to be mounted in pairs to create a highly rigid system capable of supporting substantial combined radial and axial loads.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly increases the limiting speed (56,000 rpm) while maintaining operational stability.
- Exceptional Precision: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications requiring extreme rotational accuracy.
- Optimized for Preload: The extra light preload (Class A) and universal matchable design minimize axial and radial play, enhancing system stiffness without generating excessive heat.
- Wide Operating Temperature Range: Suitable for operations from -30°C to 110°C, accommodating various industrial environments.
7008 ACE/HCP4ADGA Bearing Typical Application Areas
This bearing is specifically engineered for high-end applications where precision, speed, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and small tool spindles.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
- Medical Equipment: High-speed centrifuges and imaging device rotors.
