71940 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71940 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
5.11 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
200 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
280 mm
Outside diameter tolerance
-0.013mm to 0
Width
38 mm
Width tolerance
-0.24mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
25.4 mm
Ball quantity
26
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
46800 lbf
Radial static load rating
59625 lbf
Limiting speed
8.5 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:
$ 4663
/ each
In Stock
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71940 CD/HCP4A Bearing Product Overview & Core Advantages
The 71940 CD/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. This single bearing features a 15° contact angle and is supplied with a preload, delivering superior rotational accuracy, high system rigidity, and precise axial positioning. Its construction with a phenolic cage and ceramic balls enables outstanding high-speed capabilities, reaching a limiting speed of 8,500 rpm. Designed to handle combined loads, this bearing is an ideal solution for high-reliability, high-rigidity applications.
71940 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71940 | Basic bearing series and size designation. |
| CD | Indicates a 15° contact angle and a specific internal design optimized for high rigidity and preload. |
| HC | Signifies the use of Hybrid Ceramic balls (ceramic balls with steel rings). |
| P4 | Denotes a high-precision tolerance class (ABEC-7 / ISO P4), ensuring minimal runout and vibration. |
| A | Confirms the bearing is supplied with a preload for immediate high-stiffness operation. |
71940 CD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The angular contact design with a 15° contact angle and factory-applied preload provides exceptional system stiffness and minimizes axial and radial deflection under load, crucial for precision machinery.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density ceramic (hybrid) balls reduces centrifugal forces, enabling stable operation at the high limiting speed of 8,500 rpm.
- Extended Service Life and Reliability: Ceramic balls are harder, lighter, and offer superior resistance to wear and degradation. They also provide better performance in marginal lubrication conditions, contributing to a longer bearing service life.
- High Load Capacity: With a dynamic load rating of 46,800 lbf and a static load rating of 59,625 lbf, this bearing is capable of handling significant combined radial and axial loads.
71940 CD/HCP4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for demanding applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring utmost precision and rigidity.
- High-Frequency Motors and Spindles: Where low vibration and high rotational accuracy are paramount.
- Precision Robotics: In arm joints and rotary actuators for accurate and repeatable positioning.
- Aerospace and Defense Systems: Including gyroscopes, radar systems, and other critical rotating assemblies.
- Medical Equipment: Such as high-speed dental handpieces and imaging device rotors.
