71820 CD/HCP4
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71820 CD/HCP4
Basic Information
System of measurement
Metric
Weight
0.28 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
125 mm
Outside diameter tolerance
-0.009mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
34
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
5062 lbf
Radial static load rating
6525 lbf
Limiting speed
17 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:
$ 1384.49
/ each
In Stock
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71820 CD/HCP4 Bearing Product Overview & Core Advantages
The 71820 CD/HCP4 is a single-row angular contact ball bearing engineered for applications demanding high precision and superior performance. Its defining characteristic is the 15° contact angle, which enables it to support significant combined loads—handling both radial and axial forces simultaneously with high efficiency. Manufactured to the exacting P4 (ABEC-7) tolerance class, this bearing guarantees exceptional running accuracy and rotational stability. The combination of a ceramic ball set and a phenolic cage contributes to its high-speed capability, low friction, and extended service life, making it an ideal choice for high-reliability, high-RPM machinery.
71820 CD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71820 | Basic bearing designation, indicating a metric, single-row angular contact bearing with a 100mm bore, 125mm OD, and 13mm width. |
| CD | Indicates a specific contact angle (15°) and optimized internal geometry for high rigidity and precise operation. |
| HC | Signifies the use of Hybrid Ceramic balls, offering advantages in high-speed performance and reduced wear. |
| P4 | Denotes the tolerance class (ABEC-7), ensuring ultra-precise dimensions and runout for high-precision applications. |
71820 CD/HCP4 Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The optimized internal design and P4 precision provide exceptional dimensional stability and rotational accuracy, crucial for minimizing vibration and runout in precision spindles.
- Superior Load Capacity: The 15° contact angle is engineered to effectively handle combined radial and axial loads, making it suitable for applications with complex loading conditions.
- Enhanced High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density ceramic (silicon nitride) balls reduces centrifugal forces, allowing for a high limiting speed of 17,000 rpm. This hybrid construction also offers electrical insulation and superior performance under marginal lubrication.
- Preload Availability: The bearing is supplied with a preload, which eliminates internal clearance, increases system stiffness, and improves rotational accuracy for demanding applications.
71820 CD/HCP4 Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for advanced machinery where speed, accuracy, and reliability are paramount. Key application fields include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy gearboxes.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- High-Frequency Motors and Spindles: Used in PCB drilling and semiconductor manufacturing equipment.
