71802 CD/HCP4DBA
Hybrid Ceramic Super Precision Bearings
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71802 CD/HCP4DBA Bearing Product Overview & Core Advantages
The 71802 CD/HCP4DBA is a metric duplex angular contact ball bearing designed for applications demanding extremely high precision and rigidity. This matched pair, arranged in a back-to-back (DB) configuration, is engineered to handle combined loads—simultaneously supporting substantial radial loads and bidirectional axial loads. Its construction with a P4 tolerance class and ceramic balls makes it an ideal solution for high-speed spindles and other precision machinery where rotational accuracy and thermal stability are critical.
71802 CD/HCP4DBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71802 | Basic bearing series and size designation (15mm bore, 24mm OD). |
| C | 15° contact angle, optimized for high axial load capacity. |
| D | Indicates a duplex bearing (two bearings supplied as a set). |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for reduced friction, lower heat generation, and higher speed capability. |
| P4 | Denotes a high-precision tolerance class with extremely tight running accuracy. |
| DB | Matched Back-to-Back arrangement. This configuration provides high moment rigidity and is effective for withstanding overturning moments. |
| A | Specifies an Extra Light preload for minimal friction and optimal high-speed performance. |
71802 CD/HCP4DBA Bearing Structural Features & Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) arrangement creates a widely spaced load zone, significantly increasing the bearing's resistance to moment loads and enhancing overall system stiffness.
Superior High-Speed Performance: The combination of hybrid ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 95,000 rpm. This makes it exceptionally suitable for ultra-high-speed applications.
Precision and Accuracy: Manufactured to P4 tolerance class, this bearing ensures minimal runout and superior rotational accuracy, which is paramount in precision machining and instrumentation.
Optimized Load Capacity: The 15° contact angle is engineered to provide an excellent balance, capable of handling significant combined radial and axial loads in both directions.
71802 CD/HCP4DBA Bearing Typical Application Areas
The 71802 CD/HCP4DBA is specifically designed for the most demanding high-precision and high-speed rotational systems. Its primary applications include:
- High-Frequency CNC Spindles for precision milling, grinding, and drilling.
- Precision Machine Tool Main Shafts requiring extreme accuracy and rigidity.
- High-speed rotors in Dental and Medical Handpieces.
- Axles and spindles in advanced Aerospace and Defense instrumentation.
- Turbochargers and other high-speed Automotive Racing Components.
