QJ 320 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 320 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
9.3 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.015mm to 0
Outside diameter
215 mm
Outside diameter tolerance
-0.02mm to 0
Width
47 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
3 mm
Distance from side face to load point
110 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
139 mm
Outer Ring Dimensions
Shoulder diameter outer ring
176 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
77625 lbf
Radial static load rating
90000 lbf
Limiting speed
5.6 X 1000 rpm
Lubrication
Lubricated
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Brass
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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QJ 320 N2MA Bearing Product Overview & Core Advantages
The QJ 320 N2MA is a four-point contact ball bearing designed for applications requiring exceptional precision and load handling capabilities. This single-row bearing is engineered to simultaneously support substantial radial loads and axial loads in both directions, making it an ideal solution for compact, high-rigidity arrangements. Manufactured to a P6 (ABEC-3) tolerance class, it delivers high running accuracy and reliability for demanding industrial environments. Its optimized internal geometry and brass cage contribute to stable performance under high-speed conditions.
QJ 320 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| N2 | Indicates two circular grooves and three lubrication holes in the outer ring for effective lubrication distribution. |
| MA | Signifies that the bearing is pre-lubricated with a specific high-performance grease suitable for the designated temperature range. |
QJ 320 N2MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The raceway geometry allows the bearing to handle combined radial and bidirectional axial loads efficiently with a single bearing row, saving space and simplifying assembly.
- High Load Capacity: With a dynamic load rating of 77,625 lbf and a static load rating of 90,000 lbf, it is built for demanding applications requiring long service life under heavy loads.
- Precision & High-Speed Capability: The P6 tolerance class ensures high running accuracy, while the brass cage provides strength and stability, enabling a limiting speed of 5,600 rpm.
- Optimized Lubrication: The N2 suffix features facilitate effective grease distribution, and the pre-lubrication (MA) ensures immediate operational readiness and reduced maintenance.
- Robust Material Construction: Manufactured from chrome steel for rings and balls with a brass cage, the bearing offers high durability and resistance to wear.
QJ 320 N2MA Bearing Typical Application Areas
This bearing is particularly suited for applications with high precision and combined load requirements, including:
- Industrial Robots (e.g., robotic arms and rotary joints)
- Machine Tool Components (e.g., rotary tables, indexing heads)
- Precision Gearboxes and Drive Systems
- Medical Equipment (e.g., CT scanners, high-precision rotating assemblies)
- Aerospace Actuation Systems
