719/9 ACE/P4A
Miniature Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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719/9 ACE/P4A Bearing Product Overview & Core Advantages
The 719/9 ACE/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single-row bearing, it is engineered to accommodate primarily axial loads in one direction, as well as combined loads. Its defining characteristics include a 25° contact angle for optimal axial load capacity and a P4 (ABEC-7) tolerance class, ensuring ultra-precise running accuracy. This bearing is preloaded, which eliminates internal clearance to provide superior system rigidity and precise shaft positioning, making it ideal for high-reliability, high-precision machinery.
719/9 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 719/9 | Basic bearing series and size designation (9 mm bore). |
| ACE | Designates a 25° contact angle and specific internal design optimizations. |
| P4A | Indicates a P4 tolerance class (equivalent to ABEC-7), signifying very high precision. The 'A' suffix may denote a specific preload level or internal clearance group. |
719/9 ACE/P4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The lightweight and robust phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to the high limiting speed of 150,000 rpm.
- Superior Rigidity and Accuracy: The combination of a 25° contact angle and preload provides high axial stiffness, minimizes deflection under load, and ensures precise rotational accuracy critical for spindles.
- Optimized Load Capacity: Engineered to handle significant axial loads in one direction and combined (axial and radial) loads efficiently.
- Premium Materials: Constructed from chrome steel for rings and balls, offering high hardness, wear resistance, and a long operational life.
- Pre-Lubricated: Comes lubricated from the factory for immediate installation and initial operation, suitable for the specified temperature range.
719/9 ACE/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instruments: Measuring devices and optical equipment.
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
- Robotics: High-accuracy joints and arm assemblies.
