71900 ACDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71900 ACDGA/P4A Bearing Product Overview & Core Advantages
The 71900 ACDGA/P4A is a super-precision angular contact ball bearing designed for applications demanding the highest levels of accuracy and performance. As a single bearing with a 25° contact angle and Extra Light (A) preload, it is engineered to handle combined loads—primarily thrust loads with significant radial load capacity. Its P4A tolerance class ensures exceptional running accuracy, making it ideal for high-speed spindles and other precision machinery where high rigidity and minimal runout are critical.
71900 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7 | Bearing series, indicating a super-precision, high-speed angular contact design. |
| 1900 | Size series code, defining the dimensional boundaries (10mm bore, 22mm OD, 6mm width). |
| AC | Angular Contact geometry, optimized for combined loads. |
| D | Enhanced internal design for high-speed operation. |
| GA | Preload designation: Extra Light (Class A) preload for minimal friction and high-speed capability. |
| P4A | Tolerance Class, denoting ultra-precision dimensions and running accuracy exceeding ABEC 7. |
71900 ACDGA/P4A Bearing Structural Features & Performance Benefits
The performance of the 71900 ACDGA/P4A is a direct result of its meticulous construction:
- High Rigidity and Load Capacity: The 25° contact angle and robust internal geometry provide excellent support for combined radial and axial loads, ensuring stable operation under demanding conditions.
- Superior High-Speed Performance: The phenolic resin cage offers low weight and excellent sliding properties, contributing to the high limiting speed of 165,000 rpm. The universal matchable (SU) design allows for precise preload control when mounted in pairs or triplex sets.
- Ultra-Precision Operation: Manufactured to P4A tolerance class with tight bore, outside diameter, and width tolerances, this bearing guarantees exceptional running accuracy and minimal vibration.
- Optimized for Precision Systems: The open seal type and factory lubrication are selected for clean, high-speed environments, reducing torque and heat generation.
71900 ACDGA/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is specified for the most demanding high-speed and high-accuracy applications, including:
- High-frequency machine tool spindles
- Precision grinding spindles
- High-speed motors and robotics
- Medical and dental handpieces
- Aerospace instrumentation and control systems
