QJ 1068 N2MA
Four-Point Contact Bearings Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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QJ 1068 N2MA Bearing Product Overview & Core Advantages
The QJ 1068 N2MA is a Four Point Contact Ball Bearing designed for applications requiring exceptional precision and load handling capabilities. This metric single row bearing excels in supporting combined radial and axial loads in both directions simultaneously. Manufactured to P6 (ABEC-3) tolerance class, it delivers high running accuracy and reliability. Its compact design with a substantial 340 mm bore diameter makes it ideal for heavy-duty industrial applications where space optimization and high load capacity are critical requirements.
QJ 1068 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| N2 | Indicates the bearing has two integral guide rings (located on the outer ring) |
| MA | Specifies the bearing is pre-lubricated with a specific high-performance grease |
QJ 1068 N2MA Bearing Structural Features & Performance Benefits
Four Point Contact Design: The unique raceway geometry enables the bearing to handle combined radial and axial loads from both directions with a single bearing row, offering a compact solution that replaces traditional bearing arrangements.
High Load Capacity: With a dynamic load rating of 175,500 lbf and static load rating of 382,500 lbf, this bearing is engineered for demanding applications requiring long service life under heavy loads.
Precision Performance: Manufactured to P6 tolerance class with chrome steel rings and balls, along with a brass cage, ensures smooth operation, minimal vibration, and high positional accuracy.
Optimized Lubrication: The pre-lubricated design with high-performance grease provides immediate startup protection and extends maintenance intervals, suitable for operating temperatures from -30°C to 110°C.
QJ 1068 N2MA Bearing Typical Application Areas
- Industrial Gearboxes and power transmission systems
- Large Rotating Machinery including turbines and generators
- Heavy-Duty Machine Tools and spindle arrangements
- Construction Equipment such as large excavators and cranes
- Mining Equipment requiring high load capacity and reliability
- Wind Turbine pitch and yaw control systems
