71805 CD/HCP4
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71805 CD/HCP4 Bearing Product Overview & Core Advantages
The 71805 CD/HCP4 is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and superior rotational accuracy. Its design is optimized to support combined loads, accommodating high radial loads and substantial axial loads in one direction simultaneously. A key feature is its P4 (ABEC-7) tolerance class, ensuring minimal runout and vibration for the most demanding high-speed and high-accuracy applications. The combination of a phenolic resin cage and ceramic balls contributes to lower friction, reduced weight, and the capability for higher limiting speeds.
71805 CD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| 71805 | Basic bearing designation indicating the size series and 25 mm bore diameter. | Defines the core bearing dimensions. |
| CD | Indicates a high-contact angle (15°) and optimized internal geometry. | Enhances axial load capacity and system rigidity. |
| HC | Signifies the use of Hybrid Ceramic components (ceramic balls with steel rings). | Reduces friction, increases speed capability, and provides electrical insulation. |
| P4 | Specifies the tolerance class equivalent to ABEC-7. | Guarantees extreme dimensional and running accuracy for precision machinery. |
71805 CD/HCP4 Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of silicon nitride (Si3N4) ceramic balls with chrome steel rings results in lower density, higher stiffness, and superior performance at high speeds compared to all-steel bearings. This construction also provides non-conductive properties.
- Phenolic Resin Cage: The lightweight and robust phenolic cage is ideal for high-speed operation, offering excellent dimensional stability and low friction under high centrifugal forces.
- 15° Contact Angle & Preload: The optimized contact angle is designed to handle significant combined radial and axial loads. The availability of preload ensures precise shaft positioning, minimizes deflection, and increases system rigidity.
- Precision P4 Tolerances: Manufactured to P4/ABEC-7 standards, this bearing ensures exceptional running accuracy, which is critical for applications requiring minimal vibration and high positional repeatability.
71805 CD/HCP4 Bearing Typical Application Areas
This high-precision, high-speed angular contact bearing is ideally suited for advanced applications where performance and accuracy are paramount. Typical uses include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotic Drives and Actuators
- Aerospace Instrumentation and Gyroscopes
- Medical and Dental Handpiece Drives
