QJ 224 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 224 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
6.95 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
120 mm
Bore diameter tolerance
-0.015mm to 0
Outside diameter
215 mm
Outside diameter tolerance
-0.02mm to 0
Width
40 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
2.1 mm
Distance from side face to load point
117 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
152 mm
Outer Ring Dimensions
Shoulder diameter outer ring
183 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
67500 lbf
Radial static load rating
82125 lbf
Limiting speed
5 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
Price available upon request.
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QJ 224 N2MA Bearing Product Overview & Core Advantages
The QJ 224 N2MA is a metric single row four-point contact ball bearing engineered for exceptional performance in demanding applications. This precision bearing is specifically designed to simultaneously withstand combined loads, including radial loads and axial loads in both directions, making it an ideal solution for compact, high-rigidity mounting arrangements. Manufactured to P6 (ABEC-3) tolerance class and pre-lubricated, it delivers reliable operation and long service life in high-precision machinery.
QJ 224 N2MA Bearing Model Code Explained, Specifications & Naming Convention
The QJ 224 N2MA model designation provides detailed technical specifications:
- QJ 2: Denotes the four-point contact ball bearing series.
- 24: Indicates the bore diameter code (120 mm).
- N2: Specifies the internal design and cage type (brass cage).
- MA: Signifies the bearing is pre-lubricated with a specific high-performance grease.
QJ 224 N2MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The optimized raceway geometry enables the bearing to handle significant combined radial and axial loads from both directions with a single bearing, simplifying design and saving space.
- High Rigidity & Precision: Manufactured from chrome steel with a P6 tolerance class, this bearing ensures precise shaft guidance, minimal runout, and high operational stability.
- Robust Cage & Lubrication: The brass cage provides excellent durability and guidance at the limiting speed of 5000 rpm. The pre-applied grease (MA) ensures immediate readiness for operation and reliable performance within the specified temperature range of -30°C to 110°C.
- High Load Capacity: With a dynamic load rating of 67,500 lbf and a static load rating of 82,125 lbf, it is built for demanding applications requiring high load-bearing capability.
QJ 224 N2MA Bearing Typical Application Areas
This bearing is ideally suited for applications requiring compact design and the ability to support complex load combinations. Key industries and machinery include:
- Industrial Robots (particularly in robotic arms and rotary joints)
- Machine Tool Rotary Tables and indexing heads
- Precision Gearboxes
- Wind Turbine Yaw and Pitch Systems
- Medical and Semiconductor Manufacturing Equipment
