71806 CD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71806 CD/P4DBA Bearing Product Overview & Core Advantages
The 71806 CD/P4DBA is a precision angular contact ball bearing designed for applications requiring exceptional accuracy and reliability. This duplex back-to-back (DB) arrangement bearing set delivers superior performance in handling combined loads, including significant radial and bidirectional axial forces. Manufactured to P4 tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed spindles and precision machinery. The extra light preload (Class A) provides optimal stiffness and rotational accuracy right from installation.
71806 CD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71806 | Basic bearing designation indicating size series and bore diameter (30mm) |
| CD | Duplex arrangement: Back-to-Back (DB) configuration |
| P4 | High precision tolerance class for superior running accuracy |
| DBA | Specific internal design with 15° contact angle and extra light preload |
71806 CD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back arrangement creates a rigid bearing system that effectively resists moment loads and handles combined radial and axial loads simultaneously. The optimized 15° contact angle provides excellent axial load carrying capacity in both directions.
Precision Performance: Manufactured to P4 tolerance class with tight dimensional control (bore and OD tolerance: -0.004mm to 0), this bearing ensures minimal vibration and superior running accuracy. The phenolic cage offers excellent strength-to-weight ratio and smooth operation at high speeds.
High-Speed Capability: With a limiting speed of 100,500 rpm, this bearing is engineered for demanding high-speed applications. The lightweight phenolic cage and precision-ground chrome steel components contribute to reduced centrifugal forces and stable operation.
Material Excellence: Constructed from high-grade chrome steel for both rings and balls, providing excellent wear resistance and durability. The bearing comes pre-lubricated for immediate operation within the specified temperature range of -30°C to 110°C.
71806 CD/P4DBA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers
- High-Speed Machining Centers: Where rotational accuracy and stiffness are critical
- Precision Instrumentation: Measuring devices and optical equipment requiring minimal runout
- Robotic Systems: High-accuracy joints and positioning mechanisms
- Medical Equipment: Dental handpieces and surgical tools demanding precision and reliability
- Aerospace Components: Guidance systems and auxiliary power units
