71809 CD/HCP4
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71809 CD/HCP4 Bearing Product Overview & Core Advantages
The 71809 CD/HCP4 is a single-row angular contact ball bearing engineered for applications demanding high precision and superior rotational accuracy. Designed to accommodate primarily axial loads in one direction, it features a 15° contact angle for optimal performance. Its compact design with a 7 mm width makes it ideal for space-constrained, high-speed applications. Manufactured to P4 (ABEC-7) tolerance class, this bearing ensures exceptional running accuracy and is preloaded for enhanced rigidity and minimal axial play.
71809 CD/HCP4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71809 | Basic bearing designation, indicating a metric, single-row angular contact ball bearing with a 45 mm bore. |
| CD | Indicates a specific contact angle (15°) and internal design optimized for high precision and high rigidity. |
| HC | Signifies the use of Hybrid Ceramic components, specifically ceramic balls for reduced weight, lower friction, and higher speed capability. |
| P4 | Denotes the tolerance class, equivalent to ABEC-7, ensuring extremely tight dimensional and running accuracy. |
71809 CD/HCP4 Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables a limiting speed of 40,000 rpm. This construction also offers superior resistance to electrical erosion and operates effectively with minimal lubrication.
High Rigidity & Preload: The bearing is supplied with a light preload, which eliminates internal clearance, increases system stiffness, and improves positional accuracy for critical applications.
Phenolic Resin Cage: The phenolic cage provides excellent dimensional stability at high speeds, low weight for reduced inertia, and is suitable for the specified high-temperature range.
Precision Performance: Manufactured to P4 tolerance class, this bearing guarantees minimal runout and vibration, contributing to the smooth and precise operation of the entire system.
71809 CD/HCP4 Bearing Typical Application Areas
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Electric Motors
- Robotic Arm Joints and Drives
- Aerospace Actuators and Instrumentation
- Medical and Dental Handpiece Drives
