71906 CE/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71906 CE/P4ADBA Bearing Product Overview & Core Advantages
The 71906 CE/P4ADBA is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a duplex bearing supplied in a Back-to-Back (DB) arrangement, it is pre-configured to provide exceptional stability and can accommodate combined loads (radial and axial). Manufactured to the stringent P4A tolerance class, this bearing delivers unmatched running accuracy, making it ideal for high-precision spindles and machinery where minimal runout and superior performance are critical.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Bearing series and size designation (30mm bore, 47mm OD, 18mm width). |
| CE | High-precision, universal match design. Allows for flexible mounting arrangements. |
| P4A | The tolerance class, denoting super-precision levels for bore, outer diameter, and width, with restricted runout tolerances. |
| DB | Indicates the bearing is supplied as a Duplex Back-to-Back matched set. |
| A | Specifies an Extra light preload for minimal friction and optimal high-speed operation. |
71906 CE/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The Back-to-Back (DB) duplex arrangement creates a wide, rigid support system that effectively resists overturning moments, ensuring exceptional shaft positioning accuracy and system stability.
Superior High-Speed Performance: The combination of a lightweight phenolic cage, a 15° contact angle, and extra light preload minimizes centrifugal forces and friction, enabling reliable operation at the high limiting speed of 100,500 rpm.
Precision & Load Capacity: Manufactured to P4A super-precision standards with tight dimensional tolerances, this bearing ensures smooth, quiet, and vibration-free operation. It offers a dynamic load rating of 2077 lbf and a static load rating of 1440 lbf for reliable performance under significant combined loads.
Optimized Material & Lubrication: Constructed from high-grade chrome steel for rings and balls, ensuring durability and long service life. The bearing is pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
71906 CE/P4ADBA Bearing Typical Application Areas
The 71906 CE/P4ADBA is engineered for high-performance applications requiring extreme precision and speed, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and high-speed electric motors.
- Medical Equipment: Dental handpieces and laboratory instrumentation.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation equipment.
