QJ 206 N2MA
Four-Point Contact Bearings Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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QJ 206 N2MA Bearing Product Overview & Core Advantages
The QJ 206 N2MA is a metric single row four-point contact ball bearing engineered for high-performance applications requiring exceptional precision and load handling. This bearing is specifically designed to simultaneously accommodate combined radial and axial loads from any direction with high rigidity. Its compact design, featuring a 16 mm width, makes it ideal for space-constrained, high-reliability assemblies. Manufactured to a P6 (ABEC-3) tolerance class, it delivers the dimensional accuracy and running consistency demanded by precision machinery.
QJ 206 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| QJ 206 | Denotes the bearing series and size. QJ indicates a four-point contact ball bearing design. 206 specifies a 30 mm bore, 62 mm OD, and 16 mm width. |
| N2 | Signifies that the bearing is pre-lubricated from the factory. |
| MA | Indicates the use of a brass cage (Cage material), which provides high strength and is suitable for high-speed operation and demanding applications. |
QJ 206 N2MA Bearing Structural Features & Performance Benefits
Four-Point Contact Design: The unique raceway geometry allows a single bearing to handle axial loads in both directions as well as radial loads, simplifying bearing arrangements and reducing assembly size and cost.
High Rigidity & Load Capacity: The robust single row construction and optimized internal geometry provide high rigidity, supporting a dynamic load rating of 8438 lbf and a static load rating of 6862 lbf.
High-Speed Capability: The brass cage (MA) ensures stability and low friction at high rotational speeds, contributing to a limiting speed of 19,000 rpm.
Precision & Reliability: Manufactured from chrome steel for both rings and balls and held to a P6 tolerance class, this bearing guarantees precise running accuracy and long service life.
Ready-to-Install: The bearing is supplied pre-lubricated (N2), making it immediately ready for operation and reducing maintenance requirements.
QJ 206 N2MA Bearing Typical Application Areas
The QJ 206 N2MA is ideally suited for applications requiring compact design and the ability to handle complex load conditions. Key industries and equipment include:
- Robotics and Automation: Used in robot arm joints and rotary actuators.
- Machine Tools: Applied in rotary tables, indexing heads, and spindle supports.
- Aerospace & Defense: Suitable for radar bases, gyroscopes, and control mechanisms.
- Medical Equipment: Found in precision scanners and surgical device rotors.
- Industrial Machinery: Used in swivel mechanisms and precision gearboxes.
