QJ 1292 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 1292 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
415 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
460 mm
Bore diameter tolerance
-0.035mm to 0
Outside diameter
830 mm
Outside diameter tolerance
-0.06mm to 0
Width
165 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
7.5 mm
Distance from side face to load point
645 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
602 mm
Outer Ring Dimensions
Shoulder diameter outer ring
688 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
344250 lbf
Radial static load rating
956250 lbf
Limiting speed
1.1 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 1292 N2MA Bearing Product Overview & Core Advantages
The QJ 1292 N2MA is a high-precision four-point contact ball bearing designed for demanding industrial applications. This single row bearing excels in its ability to simultaneously support substantial combined loads, including radial loads and axial loads from both directions, within a compact cross-section. Manufactured to a P6 (ABEC-3) tolerance class, it delivers exceptional running accuracy and reliability, making it an ideal component for high-rigidity and high-performance systems.
QJ 1292 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| QJ 1292 | Denotes the standard four-point contact ball bearing series with a 460 mm bore and 830 mm outside diameter. |
| N2 | Indicates the bearing has two annular grooves and lubrication holes in the outer ring for continuous or periodic relubrication. |
| MA | Specifies that the bearing is supplied with a specific high-performance lubricant suitable for the stated operating temperature range. |
QJ 1292 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 dynamic load rating of 344,250 lbf and a static load rating of 956,250 lbf, this bearing is engineered for heavy-duty applications requiring long service life.
- Precision & Rigidity: The P6 tolerance class ensures precise shaft guidance and low runout, while the robust construction with a brass cage provides high operational stability.
- Relubrication Feature: The N2 suffix enables the bearing to be relubricated in-situ, extending service life and maintaining performance in continuous operation.
- Premium Materials: Constructed from chrome steel for both rings and balls, the bearing offers excellent wear resistance and durability.
QJ 1292 N2MA Bearing Typical Application Areas
This bearing is specifically designed for large, heavy-duty machinery where high load capacity and precision are paramount. Key applications include:
- Industrial Turntables and Slewing Rings
- Large Gearboxes and Drives
- Construction Machinery (e.g., excavators, cranes)
- Wind Turbine Yaw and Pitch Systems
- Heavy-Duty Material Handling Equipment
