QJ 330 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 330 N2MA Bearing Product Overview & Core Advantages
The QJ 330 N2MA is a metric four-point contact ball bearing designed for applications requiring exceptional load carrying capacity in a compact design. This single row bearing is engineered to simultaneously withstand combined radial and axial loads from both directions, making it an ideal solution for high-precision, high-rigidity applications. Manufactured to P6 (ABEC-3) tolerance class, it delivers reliable performance and dimensional accuracy for demanding industrial environments.
QJ 330 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Advantage |
|---|---|---|
| N2 | Snap ring groove on outer ring | Facilitates axial location and simplifies housing design |
| MA | Brass cage, window type | Enhanced strength and stability at moderate speeds |
QJ 330 N2MA Bearing Structural Features & Performance Benefits
Four-Point Contact Design: The unique raceway geometry enables the bearing to handle combined radial and axial loads from any direction with a single bearing row, offering space-saving advantages.
High Load Capacity: With a dynamic load rating of 119,250 lbf and static load rating of 172,125 lbf, this bearing delivers exceptional durability under heavy operating conditions.
Precision Performance: Manufactured to P6 tolerance class with precise bearing dimensions (150mm bore × 320mm OD × 65mm width), ensuring accurate rotational performance and minimal runout.
Robust Construction: Features chrome steel rings and balls with a brass cage for reliable operation and extended service life in demanding applications.
QJ 330 N2MA Bearing Typical Application Areas
- Industrial Robotics: Rotary joints and positioning systems requiring high moment load capacity
- Machine Tool Components: Rotary tables, indexing heads, and precision positioning devices
- Material Handling Equipment: Turntables and slewing rings for heavy-duty applications
- Wind Turbine Systems: Yaw and pitch control mechanisms
- Construction Machinery: Slewing bearings for excavators and cranes
