71806 ACD/HCP4
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71806 ACD/HCP4
Basic Information
System of measurement
Metric
Weight
0.024 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
42 mm
Outside diameter tolerance
-0.006mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
23
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
936 lbf
Radial static load rating
799 lbf
Limiting speed
53 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:
$ 296.39
/ each
In Stock
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71806 ACD/HCP4 Bearing Product Overview & Core Advantages
The 71806 ACD/HCP4 is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional speed performance. This metric-series bearing features a P4 (ABEC-7) tolerance class, ensuring minimal runout and superior rotational accuracy. Its core advantage lies in its optimized design for handling combined loads, particularly high axial loads in one direction, making it ideal for high-speed spindles and precision machinery where rigidity and accuracy are paramount. The combination of a ceramic ball material and a phenolic cage contributes to lower friction, reduced weight, and higher limiting speeds.
71806 ACD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71806 | Basic bearing series and size designation (30mm bore, 42mm OD, 7mm width). |
| ACD | Angular Contact design with a 25° contact angle, optimized for high axial load capacity. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls (typically Silicon Nitride, Si3N4) for enhanced speed and reduced friction. |
| P4 | Precision Tolerance Class equivalent to ABEC-7, guaranteeing extremely tight dimensional and running accuracy. |
71806 ACD/HCP4 Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls with a steel ring significantly reduces centrifugal forces, lowers operating temperature, and enables a higher limiting speed (53,000 rpm). This construction also offers superior corrosion resistance and electrical insulation properties.
- High-Precision Phenolic Cage: The lightweight and robust phenolic cage provides excellent guidance for the ceramic balls, ensuring stable operation at very high speeds and contributing to the bearing's low vibration characteristics.
- Optimized Contact Angle: The 25° contact angle is specifically chosen to provide an excellent balance between radial and axial load capacities, making this bearing highly effective for applications with significant thrust loads.
- Superior Rigidity and Accuracy: Manufactured to P4 tolerance with a preload option, this bearing delivers high system stiffness, minimal axial and radial play, and precise rotational performance, which is critical for machine tool spindles.
- Wide Temperature Range: Capable of operating in a temperature range from -30°C to 110°C, suitable for various industrial environments.
71806 ACD/HCP4 Bearing Typical Application Areas
- High-Speed Machine Tool Spindles (CNC milling, grinding, and drilling machines)
- Precision Robotic Drives and Actuators
- High-Frequency Electric Motors and Spindles
- Aerospace Instrumentation and Guidance Systems
- Medical and Dental Equipment Spindles
- Semiconductor Manufacturing Equipment
