QJ 319 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 319 N2MA Bearing Product Overview & Core Advantages
The QJ 319 N2MA is a four-point contact ball bearing designed for applications requiring exceptional precision and load handling capabilities. This single-row bearing excels in high-precision applications due to its P6 tolerance class (ABEC-3) and can simultaneously accommodate significant radial loads and axial loads from both directions. Its compact design and high load ratings make it ideal for space-constrained, high-reliability machinery where precise rotational accuracy is paramount.
QJ 319 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| QJ | Designates a four-point contact ball bearing |
| 319 | Standard bearing size designation (95mm bore, 200mm OD) |
| N2 | Indicates two locating slots on the outer ring |
| MA | Specifies brass cage material and pre-lubrication |
QJ 319 N2MA Bearing Structural Features & Performance Benefits
Four-Point Contact Design: The unique raceway geometry enables the bearing to handle combined radial and axial loads in both directions with a single bearing row, providing exceptional space efficiency.
High Precision Construction: Manufactured to P6 tolerance class (ABEC-3) with precise bearing dimensions (95mm bore, 200mm OD, 45mm width), ensuring reliable performance in precision applications.
Superior Load Capacity: Features impressive dynamic load rating of 68,625 lbf and static load rating of 76,500 lbf, making it suitable for demanding applications.
Optimized Cage Design: The brass cage provides excellent guidance and stability at the limiting speed of 6,000 rpm, while the pre-lubrication ensures immediate operational readiness.
Precise Shoulder Dimensions: With outer ring shoulder diameter of 165mm and inner ring large-side shoulder diameter of 131mm, the bearing offers secure mounting and optimal load distribution.
QJ 319 N2MA Bearing Typical Application Areas
The QJ 319 N2MA is particularly suited for:
- Industrial Robotics - Joint and rotary axis applications requiring high precision and compact design
- Machine Tool Rotary Tables - Indexing and positioning systems demanding high accuracy and load capacity
- Material Handling Equipment - Turntables and slewing rings in automated systems
- Aerospace Actuators - Precision motion control systems requiring reliable performance
- Medical Equipment - Rotary components in diagnostic and treatment devices
- Wind Turbine Yaw Systems - Where compact design and high load capacity are essential
