QJ 1264 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 1264 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
130 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
320 mm
Bore diameter tolerance
-0.03mm to 0
Outside diameter
580 mm
Outside diameter tolerance
-0.038mm to 0
Width
105 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
5 mm
Distance from side face to load point
450 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
421 mm
Outer Ring Dimensions
Shoulder diameter outer ring
479 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
215100 lbf
Radial static load rating
468000 lbf
Limiting speed
1.7 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 1264 N2MA Bearing Product Overview & Core Advantages
The QJ 1264 N2MA is a Four Point Contact Ball Bearing designed for exceptional performance in demanding applications. This single row bearing combines a compact design with the unique ability to simultaneously support high radial loads and axial loads from both directions. Manufactured to a P6 (ABEC-3) tolerance class, it delivers the precision and reliability required for high-accuracy machinery. Its robust construction ensures high rigidity and long service life, making it an ideal solution for complex loading scenarios.
QJ 1264 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| QJ 1264 | Basic bearing designation for a four-point contact ball bearing. | Defines the core bearing type and its contact angle geometry. |
| N2 | Indicates two circumferential grooves and lubrication holes in the outer ring. | Facilitates efficient re-lubrication, extending operational life. |
| MA | Specifies a brass cage (machined). | Provides high strength, excellent guidance, and suitability for high-speed applications. |
QJ 1264 N2MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The optimized raceway geometry allows a single bearing to handle combined radial and bidirectional axial loads efficiently, simplifying bearing arrangements and saving space.
- High Load Capacity: With a radial dynamic load rating of 215,100 lbf and a radial static load rating of 468,000 lbf, this bearing is engineered for heavy-duty applications and high static load conditions.
- Precision & Rigidity: The P6 tolerance class ensures precise running accuracy, while the solid construction provides high rigidity for stable operation under load.
- Machined Brass Cage (MA): The high-strength brass cage ensures reliable ball guidance, contributing to smooth operation and enhanced high-speed capability up to the limiting speed of 1,700 rpm.
- Re-lubrication Feature (N2): The outer ring grooves and lubrication holes allow for periodic re-lubrication, which is crucial for maintaining performance and longevity in continuous operation.
QJ 1264 N2MA Bearing Typical Application Areas
This bearing is ideally suited for heavy machinery and precision equipment where robust performance under complex loads is critical. Key applications include:
- Industrial Turntables and Slewing Rings
- Large Gearboxes and Drivetrains
- Construction Machinery (e.g., excavators, cranes)
- Wind Turbine Yaw and Pitch Systems
- Material Handling Equipment
