708 CD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
708 CD/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
0.022 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
8 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
22 mm
Outside diameter tolerance
-0.004mm to 0
Width
14 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
9
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1186 lbf
Radial static load rating
619 lbf
Limiting speed
110 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
In Stock
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
708 CD/HCP4ADBA Bearing Product Overview & Core Advantages
The 708 CD/HCP4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement is preloaded to Extra Light (Class A) specifications, ensuring minimal axial and radial runout for superior performance. Its construction with a ceramic ball and phenolic cage enables outstanding high-speed capabilities and thermal stability. This bearing is engineered to handle combined loads efficiently, making it an ideal solution for high-precision, high-reliability machinery where stiffness and speed are critical.
708 CD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
The model number 708 CD/HCP4ADBA provides detailed technical specifications:
- 708: Basic bearing series designation.
- CD: Indicates a duplex pair in a Back-to-Back (DB) arrangement.
- HC: Signifies the use of Hybrid Ceramic balls (Silicon Nitride).
- P4A: Denotes a super-precision tolerance class (exceeding ABEC 7).
- DB: Confirms the Back-to-Back mounting configuration.
- A: Specifies the Extra Light preload level.
708 CD/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The duplex back-to-back design and Class A preload create an exceptionally rigid bearing system that minimizes deflection under load, ensuring supreme positional accuracy and repeatability.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly lowers friction and heat generation, enabling a high limiting speed of 110,000 rpm.
- Excellent Load Capacity: The 15° contact angle is optimized to handle significant combined radial and axial loads simultaneously, providing versatile performance in demanding applications.
- Thermal and Operational Stability: Hybrid ceramic construction offers superior resistance to thermal expansion compared to all-steel bearings, maintaining precision and preload over a wide temperature range.
708 CD/HCP4ADBA Bearing Typical Application Areas
This high-precision bearing is ideally suited for:
- High-Frequency CNC Spindles for milling, grinding, and drilling
- Precision Machine Tool Axes
- High-Speed Robotics and automation arms
- Advanced Medical Equipment spindles (e.g., dental drills)
- Aerospace Instrumentation and guidance systems
