71920 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71920 CE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.65 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
140 mm
Outside diameter tolerance
-0.009mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
24
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
8775 lbf
Radial static load rating
7088 lbf
Limiting speed
24 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:
$ 1309.85
/ each
In Stock
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71920 CE/HCP4A Bearing Product Overview & Core Advantages
The 71920 CE/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. This single-row bearing is designed to accommodate high combined loads, primarily thrust loads in one direction, with a 15° contact angle for optimal performance. Its standout feature is the use of ceramic balls and a phenolic cage, which contribute to lower friction, higher limiting speeds, and extended service life. Manufactured to P4 (ABEC-7) tolerance and supplied preloaded, it is the ideal solution for high-speed, high-rigidity spindles and precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71920 | Basic bearing designation, indicating a metric, single-row angular contact ball bearing with a 100mm bore, 140mm OD, and 20mm width. |
| CE | Indicates a 15° contact angle, optimized for high-speed applications requiring high thrust capacity. |
| HC | Signifies the use of Hybrid Ceramic components, specifically ceramic (silicon nitride) balls. |
| P4A | Denotes a P4 precision class (equivalent to ABEC-7) and that the bearing is supplied preloaded for immediate high-rigidity performance. |
71920 CE/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction and heat generation, enabling a high limiting speed of 24,000 rpm. This also provides electrical insulation, non-magnetic properties, and superior wear resistance.
- High Rigidity & Precision: The P4 tolerance class and factory-applied preload ensure minimal runout and exceptional rotational accuracy, delivering the high rigidity required for precision machining and high-speed spindles.
- Optimized Cage Design: The lightweight, self-lubricating phenolic cage ensures stable operation at high speeds, reduces centrifugal forces, and is compatible with the bearing's high-temperature range.
- Superior Load Capacity: The 15° contact angle is engineered to handle significant combined radial and axial loads, with a dynamic load rating of 8775 lbf and a static load rating of 7088 lbf.
71920 CE/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for the most demanding high-speed and high-precision applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy robotic arms and joints.
- Aerospace & Defense: Gyroscopes, radar systems, and avionics.
- High-Speed Motors & Drives: Electric motors and spindles for PCB drilling and semiconductor manufacturing.
