QJ 203 N2MA
Four-Point Contact Bearings Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
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Performance
Materials
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QJ 203 N2MA Bearing Product Overview & Core Advantages
The QJ 203 N2MA is a metric single row four-point contact ball bearing engineered for applications requiring exceptional precision and load handling capabilities. This bearing is specifically designed to simultaneously accommodate combined radial and axial loads from both directions, making it an ideal solution for compact spaces demanding high rotational accuracy and rigidity. Manufactured to a P6 (ABEC-3) tolerance class and pre-lubricated, it delivers reliable performance and long service life in demanding operational environments.
QJ 203 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| QJ 203 | Basic bearing designation for a four-point contact ball bearing with a 17mm bore. |
| N2 | Indicates specific internal design modifications for optimized load distribution. |
| MA | Signifies that the bearing is pre-lubricated with a high-performance grease suitable for the specified temperature range. |
QJ 203 N2MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The unique raceway geometry allows the bearing to handle combined radial and axial loads efficiently in both directions, eliminating the need for complex bearing arrangements.
- High Rigidity and Precision: Built to a P6 tolerance class with a brass cage for stable operation, this bearing provides high running accuracy and stiffness, crucial for precision applications.
- Optimized Load Capacity: With a dynamic load rating of 3825 lbf and a static load rating of 2565 lbf, it is designed for demanding duty cycles.
- Ready-to-Install Convenience: The bearing comes pre-lubricated, facilitating easy installation and providing immediate protection against wear.
QJ 203 N2MA Bearing Typical Application Areas
The QJ 203 N2MA is ideally suited for a wide range of industrial applications where space is limited and high precision is paramount. Key sectors include:
- Robotics and Automation: Used in robot joint arms and rotary actuators.
- Precision Machinery: Critical for the rotary tables of machine tools and indexing heads.
- Aerospace and Defense: Applied in radar platforms, gyroscopes, and antenna positioning systems.
- Medical Equipment: Found in high-precision scanners and diagnostic device rotors.
