71920 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71920 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.67 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
26
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
13612 lbf
Radial static load rating
14738 lbf
Limiting speed
16 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:
$ 1309.79
/ each
In Stock
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71920 CD/HCP4A Bearing Product Overview & Core Advantages
The 71920 CD/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and reliability. This single-row bearing features a 15° contact angle and is supplied with a preload, ensuring high system rigidity and minimal axial/radial runout. Its construction with a ceramic ball and phenolic cage contributes to superior high-speed performance, reduced weight, and extended service life. Designed to handle combined loads, it is an ideal solution for high-performance spindles and precision machinery.
71920 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71920 | Basic bearing series and size designation. |
| CD | Indicates a 15° contact angle and a specific internal design optimized for high precision and rigidity. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride), offering advantages in speed, temperature resistance, and lifespan. |
| P4 | Denotes a super-precision tolerance class (ABEC-7), ensuring extremely tight dimensional and running accuracy. |
| A | Indicates that the bearing is supplied with a preload for enhanced stiffness and rotational accuracy. |
71920 CD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The 15° contact angle and applied preload work in concert to provide exceptional system stiffness, critical for minimizing deflection under load in high-precision applications.
- Superior High-Speed Capability: The combination of a lightweight phenolic resin cage and low-density ceramic balls reduces centrifugal forces, enabling a high limiting speed of 16,000 rpm. This makes it ideal for high-speed spindles.
- Enhanced Durability and Performance: Hybrid ceramic construction provides inherent electrical insulation, reduced operating temperature, and superior performance in lubricant-starved conditions compared to all-steel bearings.
- Optimized Load Capacity: Engineered to handle significant combined radial and axial loads simultaneously, with a dynamic load rating of 13,612 lbf and a static load rating of 14,738 lbf.
71920 CD/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for high-end, demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and high-speed electric motors.
- Medical Equipment: High-speed dental handpieces and imaging devices.
