71806 CD/P4DFA
71800 Series Super Precision Angular Contact Ball Bearings
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71806 CD/P4DFA Bearing Product Overview & Core Advantages
The 71806 CD/P4DFA is a duplex pair of metric precision angular contact ball bearings in a Face-to-Face (DF) arrangement. This configuration is engineered to provide exceptional high rigidity and stability, making it ideal for applications requiring high precision and accurate rotational performance. The bearings are manufactured to a P4 tolerance class, ensuring superior dimensional and running accuracy. Pre-loaded with an Extra light (Class A) preload, this matched set is optimized for smooth operation and is supplied lubricated for immediate use.
71806 CD/P4DFA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71806 | Basic bearing designation, indicating a 30mm bore, 42mm OD, 14mm width angular contact bearing. |
| C | Specifies a 15° contact angle, optimized for handling combined loads. |
| D | Indicates the bearing is part of a duplex pair (a matched set of two bearings). |
| P4 | Denotes a high precision tolerance class, superior to standard ABEC-7. |
| DF | Specifies the Face-to-Face (DF) mounting arrangement of the duplex pair. |
| A | Indicates an Extra light preload (Class A) applied to the matched set. |
71806 CD/P4DFA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex DF arrangement significantly increases system rigidity by providing a wide, stable support base. This is critical for minimizing deflection under combined loads (radial and axial).
Precision Performance: Manufactured to P4 tolerance standards with a phenolic cage, this bearing ensures low vibration, low noise, and high running accuracy, which is essential for high-speed applications.
Optimized Load Capacity: The 15° contact angle is engineered to efficiently handle combined loads, offering a balanced performance for both radial and axial forces.
High-Speed Capability: The lightweight and robust phenolic cage is designed for high-speed operation, contributing to the bearing's high limiting speed of 83,000 rpm.
71806 CD/P4DFA Bearing Typical Application Areas
The 71806 CD/P4DFA is designed for high-performance applications where precision, rigidity, and speed are paramount. Typical uses include:
- High-Frequency Spindles for CNC machining centers and precision grinding machines
- Precision Instrumentation and measuring equipment
- High-speed rotors in medical and dental handpieces
- Aerospace auxiliary systems and instrumentation
- Other machinery requiring ultra-precise, high-rigidity bearing arrangements
