71900 CE/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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71900 CE/P4ADBA Bearing Product Overview & Core Advantages
The 71900 CE/P4ADBA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. This metric bearing features a duplex back-to-back (DB) arrangement and an extra light preload (Class A), making it ideal for high-speed spindles and other precision machinery. Its primary advantage lies in its ability to handle combined loads—simultaneously supporting significant radial loads and axial loads in both directions. The P4A tolerance class ensures superior running accuracy, while the compact design with a 10 mm bore provides a high-performance solution in a minimal footprint.
71900 CE/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71900 | Basic bearing series, indicating a super-light series metric angular contact ball bearing. |
| CE | Contact angle of 15°, optimized for high-speed operation and moderate axial load capacity. |
| P4A | High-precision tolerance class, exceeding ABEC 7 standards, ensuring minimal runout and vibration. |
| DB | Duplex Back-to-Back arrangement. This configuration provides high moment rigidity and is optimal for withstanding overturning moments. |
| A | Specifies an Extra Light Preload. This preload minimizes axial and radial play, enhancing stiffness and positioning accuracy at high speeds. |
71900 CE/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) arrangement of two bearings creates a wide effective spread, significantly increasing the system's moment stiffness and resistance to tilting moments. This is critical for maintaining precision under complex loads.
Superior Load Capacity: The 15° contact angle is engineered to handle combined radial and axial loads efficiently. The bearing's dynamic and static load ratings ensure reliable performance in demanding applications.
Exceptional High-Speed Performance: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to lower friction, reduced heat generation, and a high limiting speed of 185,000 rpm. The open design and factory lubrication facilitate efficient heat dissipation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees high running accuracy and low noise levels, which is essential for spindle and other precision applications.
71900 CE/P4ADBA Bearing Typical Application Areas
- High-Frequency Spindles for CNC machining centers, grinding machines, and PCB drilling
- Precision Instrumentation and measuring equipment
- High-Speed Motors and turbo-molecular pumps
- Medical Device Drives and dental handpieces
- Aerospace Actuation Systems and gyroscopes
