QJ 1040 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 1040 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
15 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
200 mm
Bore diameter tolerance
-0.022mm to 0
Outside diameter
310 mm
Outside diameter tolerance
-0.025mm to 0
Width
51 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
2.1 mm
Distance from side face to load point
179 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
238 mm
Outer Ring Dimensions
Shoulder diameter outer ring
271 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
87750 lbf
Radial static load rating
139500 lbf
Limiting speed
3.2 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
No drawings available at the moment, will be launched soon
In Stock
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QJ 1040 N2MA Bearing Product Overview & Core Advantages
The QJ 1040 N2MA is a high-precision metric single row four-point contact ball bearing engineered for applications requiring exceptional performance under combined loads. Its unique four-point contact design enables it to simultaneously support substantial radial loads and axial loads in both directions, making it an ideal compact bearing solution that saves space and weight. Manufactured to a P6 (ABEC-3) tolerance class, it delivers the high running accuracy and reliability demanded by precision machinery and industrial equipment.
QJ 1040 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| QJ 1040 | Denotes the basic bearing series and size (200mm bore, 310mm OD). |
| N2 | Indicates the bearing has two machined grooves in the outer ring for locating snap rings. |
| MA | Signifies that the bearing is lubricated with a specific, high-performance grease suitable for the specified temperature range. |
QJ 1040 N2MA Bearing Structural Features & Performance Benefits
- Four-Point Contact & High Load Capacity: The optimized raceway geometry creates four contact points between the balls and raceways, enabling the bearing to handle significant combined radial and axial loads from any direction with a single bearing row. This results in a high radial dynamic load rating of 87,750 lbf and a static load rating of 139,500 lbf.
- High Precision & Rigidity: Manufactured to P6 tolerance and featuring a robust brass cage, this bearing ensures smooth operation, minimal vibration, and high rotational accuracy, which is critical for maintaining system rigidity.
- Integrated Lubrication & Readiness: The bearing comes pre-lubricated ("MA" suffix), ensuring immediate operational readiness and reducing initial setup time. The specified grease offers stable performance within a temperature range of -30°C to 110°C.
- Secure Mounting: The N2 designation for snap ring grooves provides a simple and effective method for axial location within the housing, simplifying assembly and enhancing operational security.
QJ 1040 N2MA Bearing Typical Application Areas
This bearing is ideally suited for heavy-duty industrial applications where compact design, high load capacity, and precision are paramount. Key sectors include:
- Industrial Robots (particularly in robotic arms and rotary joints)
- Wind Turbines (yaw and pitch control systems)
- Machine Tools (rotary tables, indexing heads)
- Material Handling Equipment (slewing rings for cranes and excavators)
- Medical and Precision Equipment
