QJ 1296 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 1296 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
470 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
480 mm
Bore diameter tolerance
-0.035mm to 0
Outside diameter
870 mm
Outside diameter tolerance
-0.06mm to 0
Width
170 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
7.5 mm
Distance from side face to load point
675 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
629 mm
Outer Ring Dimensions
Shoulder diameter outer ring
721 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
378000 lbf
Radial static load rating
1068750 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 1296 N2MA Bearing Product Overview & Core Advantages
The QJ 1296 N2MA is a Four Point Contact Ball Bearing designed for exceptional performance in demanding applications. This precision bearing is engineered to simultaneously withstand combined loads, including radial loads and axial loads in both directions, within a compact single-row design. Its high load-carrying capacity and P6 (ABEC-3) tolerance class make it an ideal solution for high-reliability and high-rigidity systems. The bearing is pre-lubricated for immediate operation and offers a wide operating temperature range.
QJ 1296 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| N2 | Indicates a snap ring groove on the outer ring, facilitating secure axial location within the housing. |
| MA | Specifies a brass cage (machined), which provides high strength, excellent dimensional stability, and is suitable for high-speed applications and demanding operating conditions. |
QJ 1296 N2MA Bearing Structural Features & Performance Benefits
- Four Point Contact Design: The unique raceway geometry allows the bearing to handle combined radial and axial loads from both directions with a single bearing row, resulting in a compact and space-saving design.
- High Load Capacity: With a substantial radial dynamic load rating of 378,000 lbf and a radial static load rating of 1,068,750 lbf, this bearing is built for heavy-duty applications and long service life.
- High-Speed Capability: The precision-machined brass cage (MA) ensures smooth operation, low friction, and contributes to a stable limiting speed of 1,100 rpm, even under significant loads.
- Precision & Rigidity: Manufactured to a P6 tolerance class, it guarantees precise running accuracy and contributes to the overall high rigidity of the system. The specified shoulder diameters ensure proper support and alignment.
- Simplified Assembly: The outer ring snap ring groove (N2) simplifies installation and provides secure axial positioning, reducing assembly time and complexity.
QJ 1296 N2MA Bearing Typical Application Areas
This bearing is ideally suited for heavy machinery and precision equipment requiring robust performance, including:
- Large industrial gearboxes
- Wind turbine main shafts and yaw systems
- Construction and mining equipment
- Heavy-duty pumps and compressors
- Material handling systems and crane slewing rings
