QJ 222 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 222 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
5.6 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
110 mm
Bore diameter tolerance
-0.015mm to 0
Outside diameter
200 mm
Outside diameter tolerance
-0.02mm to 0
Width
38 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
2.1 mm
Distance from side face to load point
109 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
141 mm
Outer Ring Dimensions
Shoulder diameter outer ring
169 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
63000 lbf
Radial static load rating
73125 lbf
Limiting speed
5.6 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 222 N2MA Bearing Product Overview & Core Advantages
The QJ 222 N2MA is a high-precision Four Point Contact Ball Bearing engineered for demanding applications requiring exceptional rigidity and load capacity. This single row bearing is designed to simultaneously withstand combined radial and axial loads from both directions, making it an ideal solution for compact, high-performance assemblies. Manufactured to a P6 (ABEC-3) tolerance class, it delivers reliable, repeatable performance in precision machinery. Its optimized internal geometry and robust construction ensure high operational stability and long service life.
QJ 222 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| N2 | Indicates the bearing has two machined grooves in the outer ring for locating snap rings, providing secure axial positioning. |
| MA | Signifies that the bearing is pre-lubricated with a specific high-performance lubrication grease suitable for the specified temperature range. |
QJ 222 N2MA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The Four Point Contact design allows the bearing to handle significant combined radial and axial loads in a compact bearing size (38mm width). The optimized raceway and ball geometry contribute to its high radial dynamic load rating of 63,000 lbf and static load rating of 73,125 lbf.
- Precision Performance: Built to a P6 tolerance class with a brass cage for superior guidance and stability, ensuring smooth operation and minimal vibration at the limiting speed of 5,600 rpm.
- Simplified Installation: The N2 suffix denotes grooves for snap rings, facilitating easy and secure mounting within a housing, reducing assembly time and complexity.
- Ready-to-Use Lubrication: Pre-lubricated with grease suitable for a temperature range of -30°C to 110°C, enabling immediate installation and initial operation without additional lubrication needs.
QJ 222 N2MA Bearing Typical Application Areas
This bearing is ideally suited for applications requiring high precision and robust load support, including:
- Industrial Robots and automation equipment (for rotary joints and arms)
- Precision Machine Tool components, such as rotary tables and indexing heads
- Material Handling Systems, including turntables and slewing rings
- Medical and Semiconductor Manufacturing Equipment
- Wind Turbine yaw and pitch control systems
