QJ 226 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 226 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
7.75 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
230 mm
Outside diameter tolerance
-0.02mm to 0
Width
40 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
3 mm
Distance from side face to load point
126 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
165 mm
Outer Ring Dimensions
Shoulder diameter outer ring
195 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
69750 lbf
Radial static load rating
90000 lbf
Limiting speed
4.8 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 226 N2MA Bearing Product Overview & Core Advantages
The QJ 226 N2MA is a Four Point Contact Ball Bearing designed for applications requiring exceptional load capacity in a compact single-row design. This precision bearing can simultaneously support substantial radial loads and axial loads from both directions, making it an ideal solution for complex loading conditions. Manufactured to P6 (ABEC-3) tolerance class, it delivers high running accuracy and reliability for demanding industrial environments. Its robust construction ensures high rigidity and stable performance across a wide operating temperature range.
QJ 226 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| QJ 226 | Standard designation for a four-point contact ball bearing with a 130mm bore diameter. |
| N2 | Indicates the bearing has two lubrication grooves and holes in the outer ring. |
| MA | Signifies that the bearing is pre-lubricated with a high-temperature, high-speed grease. |
QJ 226 N2MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The unique raceway geometry allows the bearing to handle combined loads (radial and bidirectional axial) efficiently in a single-row configuration, offering a compact bearing size without sacrificing performance.
- High Load Capacity: With a dynamic load rating of 69,750 lbf and a static load rating of 90,000 lbf, this bearing is engineered for heavy-duty applications requiring long service life.
- Precision & Rigidity: The P6 tolerance class ensures precise running, while the optimized shoulder diameters (165mm inner, 195mm outer) contribute to secure mounting and enhanced system rigidity.
- Integrated Lubrication: The N2 designation with lubrication grooves and the MA pre-lubrication facilitate efficient grease distribution, supporting the limiting speed of 4,800 rpm and extending relubrication intervals.
- Robust Material Construction: Components made from Chrome Steel and a Brass cage provide excellent durability, wear resistance, and stable operation within a temperature range of -30°C to 110°C.
QJ 226 N2MA Bearing Typical Application Areas
This bearing is ideally suited for machinery and equipment where space is limited and high load capacity is critical. Common applications include:
- Industrial Robots (particularly in robotic arms and rotary joints)
- Wind Turbine Pitch and Yaw Systems
- Machine Tool Rotary Tables and Indexing Heads
- Medical Imaging Equipment (e.g., CT scanners)
- Radar and Satellite Communication Antennas
