QJ 326 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 326 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
19.5 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
130 mm
Bore diameter tolerance
-0.018mm to 0
Outside diameter
280 mm
Outside diameter tolerance
-0.025mm to 0
Width
58 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
4 mm
Distance from side face to load point
144 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
182 mm
Outer Ring Dimensions
Shoulder diameter outer ring
227 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
102375 lbf
Radial static load rating
137250 lbf
Limiting speed
4 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
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In Stock
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QJ 326 N2MA Bearing Product Overview & Core Advantages
The QJ 326 N2MA is a Four Point Contact Ball Bearing designed for exceptional performance in demanding applications. This single row bearing is engineered to simultaneously withstand combined radial and axial loads from both directions, making it an ideal, compact solution. Manufactured to a P6 (ABEC-3) tolerance class, it delivers high running accuracy and reliability. Its optimized internal geometry and robust construction ensure high rigidity and long service life, suitable for high-precision machinery.
QJ 326 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| QJ 326 | Basic bearing designation for a four-point contact ball bearing. | Defines the core bearing type and bearing dimensions (130mm bore, 280mm OD). |
| N2 | Two-piece solid brass cage, outer ring guided. | Provides excellent stability and guidance at high speeds, contributing to the bearing's high-speed performance. |
| MA | Bearing is pre-lubricated with a specific grease. | Ensures immediate operation and reduces maintenance requirements. The grease is suitable for the specified temperature range. |
QJ 326 N2MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The raceway geometry allows the bearing to handle combined radial and axial loads efficiently in both directions with a single bearing row, offering a compact and lightweight design.
- High Load Capacity: With a dynamic load rating of 102,375 lbf and a static load rating of 137,250 lbf, this bearing is built for heavy-duty applications requiring high rigidity and durability.
- Precision & Speed: The P6 tolerance class ensures high running accuracy, while the robust brass cage (N2) enables stable operation up to the limiting speed of 4,000 rpm.
- Ready-to-Install & Low Maintenance: The bearing is supplied pre-lubricated (MA), facilitating easy installation and providing long-term, maintenance-free operation within its designated operational envelope.
- Robust Material Construction: Manufactured from chrome steel for both rings and balls, the bearing offers high strength, wear resistance, and a long operational lifespan.
QJ 326 N2MA Bearing Typical Application Areas
The QJ 326 N2MA is ideally suited for applications requiring high precision and the ability to handle complex load conditions. Key industries and machinery include:
- Industrial Robotics: Used in robot arm joints and rotary units.
- Machine Tools: Applied in rotary tables, indexing heads, and spindle supports.
- Material Handling: Suitable for slewing rings in cranes and excavators.
- Aerospace & Defense: Used in radar antennas, missile guidance systems, and other precision mechanisms.
- Medical Equipment: Found in CT scanners and other high-precision rotary devices.
