71819 CD/HCP4DBA
Hybrid Ceramic Super Precision Bearings
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71819 CD/HCP4DBA Bearing Product Overview & Core Advantages
The 71819 CD/HCP4DBA is a duplex pair of metric precision angular contact ball bearings designed for applications demanding the highest levels of accuracy and performance. This back-to-back (DB) matched set is pre-loaded to Extra light (Class A) specifications, providing exceptional running accuracy and system rigidity. Its primary advantage lies in its ability to support combined loads (radial and axial) simultaneously while maintaining high-speed capabilities. The use of ceramic balls and a phenolic cage contributes to lower friction, reduced heat generation, and superior performance in demanding conditions.
71819 CD/HCP4DBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71819 | Basic bearing designation, indicating a metric, single-row angular contact ball bearing with a 95 mm bore, 120 mm OD, and 26 mm width. |
| CD | Indicates a duplex pair in a Back-to-Back (DB) arrangement. This configuration provides high moment rigidity and excellent stability. |
| HC | Signifies the use of Hybrid Ceramic components, specifically ceramic balls (Silicon Nitride, Si3N4). |
| P4 | Denotes a high precision tolerance class (P4), ensuring extremely tight dimensional and running accuracy. |
| DB | Reinforces the Back-to-Back mounting arrangement. |
| A | Specifies the preload level as Extra light (Class A). |
71819 CD/HCP4DBA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The combination of chrome steel rings and ceramic balls significantly reduces friction, lowers operating temperature, and extends service life, especially at high speeds. This design also offers electrical insulation and superior performance in lubricant-starved conditions.
High Rigidity & Stability: The back-to-back duplex arrangement creates a wide effective spread, providing exceptional resistance to moment loads and ensuring high system rigidity. This is critical for maintaining precision under combined loads.
Precision & Speed: Manufactured to P4 tolerance and featuring a lightweight phenolic resin cage, this bearing set is engineered for smooth operation and a high limiting speed of 15,000 rpm. The 15° contact angle offers an excellent balance between radial and axial load capacity.
Optimized for Performance: The bearings are supplied lubricated and open (non-shielded), allowing for customized lubrication schemes to maximize performance in specific applications.
71819 CD/HCP4DBA Bearing Typical Application Areas
This high-precision, high-speed bearing set is ideally suited for advanced machinery requiring maximum accuracy and rigidity, including:
- Machine Tool Spindles for high-speed milling, grinding, and turning centers.
- High-Frequency Motors and Spindles.
- Precision Gearboxes and transmission systems.
- Aerospace & Defense instrumentation and control systems.
- Medical Equipment such as high-speed dental handpieces and surgical tools.
