QJ 206 MA
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 MA Bearing Product Overview & Core Advantages
The QJ 206 MA is a metric single row four-point contact ball bearing engineered for exceptional performance in demanding applications. This precision bearing is distinguished by its ability to simultaneously support combined loads, including radial loads and axial loads from both directions, within a compact cross-section. Manufactured to a P6 (ABEC-3) tolerance class, it delivers high running accuracy and reliability, making it an ideal solution for high-precision machinery requiring robust and rigid support.
QJ 206 MA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| QJ | Denotes the bearing series as a four-point contact ball bearing. |
| 206 | Specifies the standard bore diameter (30 mm) and dimension series. |
| MA | Indicates that the bearing is lubricated with a specific high-performance grease. |
QJ 206 MA Bearing Structural Features & Performance Benefits
Four-Point Contact Design: The unique raceway geometry allows a single bearing to handle combined radial and bidirectional axial loads efficiently, simplifying assembly and saving space compared to traditional bearing pairs.
High Rigidity & Load Capacity: The robust single row construction and optimized internal geometry provide high rigidity. With a dynamic load rating of 8438 lbf and a static load rating of 6862 lbf, it is built for demanding applications.
Precision & Speed Performance: The P6 tolerance class ensures high running accuracy. The brass cage contributes to stable operation and allows for a limiting speed of 19,000 rpm. The pre-applied lubricant ensures immediate operational readiness.
Material & Durability: Constructed from chrome steel for rings and balls, and a brass cage, the bearing offers excellent durability and wear resistance, suitable for a temperature range of -30°C to 110°C.
QJ 206 MA Bearing Typical Application Areas
The QJ 206 MA is ideally suited for applications requiring compact design and high load capacity in multiple directions. Key industries and machinery include:
- Industrial Robots (e.g., wrist and arm joints)
- Machine Tool Rotary Tables and Indexing Heads
- Precision Gearboxes
- Aerospace Actuation Systems
- Medical and Semiconductor Manufacturing Equipment
