706 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
706 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.005 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
6 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
17 mm
Outside diameter tolerance
-0.004mm to 0
Width
6 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
8
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
439 lbf
Radial static load rating
169 lbf
Limiting speed
190 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 99.38
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
706 ACD/HCP4A Bearing Product Overview & Core Advantages
The 706 ACD/HCP4A is a high-precision single row angular contact ball bearing engineered for applications demanding exceptional accuracy and high-speed performance. Its design is optimized to support combined loads, primarily handling thrust loads in one direction while accommodating significant radial loads. A key feature is its availability with a light preload, which minimizes axial and radial play, enhancing system rigidity and rotational accuracy right from installation. Manufactured to the exacting P4 (ABEC-7) tolerance class, this bearing is ideal for high-reliability, high-speed spindles and precision instruments.
706 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Advantage |
|---|---|---|
| ACD | 25° Contact Angle | Optimized for high thrust load capacity while maintaining good radial load performance. |
| HCP4A | Hybrid Ceramic, P4 Precision, Light Preload | H: Hybrid (Ceramic Balls). C: Ceramic material. P4: P4/ABEC-7 tolerance class for high precision. A: Light preload for reduced runout and increased rigidity. |
706 ACD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic (Si3N4) balls significantly reduces centrifugal forces, lowers operating temperature, and extends service life, especially at high speeds. This construction also offers superior resistance to electrical erosion.
- High-Speed Capability: The lightweight phenolic resin cage and optimized 25° contact angle work in tandem to enable a very high limiting speed of 190,000 rpm, making it a premier choice for ultra-high-speed applications.
- Enhanced Rigidity and Precision: The light preload (A) and P4 precision grading ensure minimal deflection under load, providing exceptional running accuracy and system stiffness critical for machining and positioning.
- Superior Load Capacity: The angular contact design is inherently capable of handling significant combined radial and axial loads, with a dynamic load rating of 439 lbf.
706 ACD/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for the most demanding high-speed and high-precision machinery, including:
- High-Frequency CNC Spindles for PCB drilling and precision milling
- High-Speed Machining Centers
- Turbocharger Shafts and auxiliary systems
- Precision Grinding Spindles
- Dental and Medical Handpiece Drives
- Aerospace Instrumentation and gyroscopes
