QJ 230 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 230 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
12.5 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
150 mm
Bore diameter tolerance
-0.018mm to 0
Outside diameter
270 mm
Outside diameter tolerance
-0.025mm to 0
Width
45 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
3 mm
Distance from side face to load point
147 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
194 mm
Outer Ring Dimensions
Shoulder diameter outer ring
226 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
90000 lbf
Radial static load rating
128250 lbf
Limiting speed
4 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 230 N2MA Bearing Product Overview & Core Advantages
The QJ 230 N2MA is a metric single row four-point contact ball bearing engineered for applications requiring exceptional load handling capabilities. This precision bearing is uniquely designed to simultaneously support substantial radial loads and axial loads from both directions, making it an ideal solution for compact, high-rigidity mounting arrangements. Manufactured to a P6 (ABEC-3) tolerance class and pre-lubricated, it delivers reliable performance in demanding operational environments.
QJ 230 N2MA Bearing Model Code Explained, Specifications & Naming Convention
The QJ 230 N2MA model designation provides key technical specifications:
- QJ: Denotes a four-point contact ball bearing type.
- 230: Standard size series code.
- N2: Indicates two integral circlips (snap rings) on the outer ring for simplified axial location within a housing.
- MA: Specifies a brass cage (maintained by the suffix "M") and a contact seal on one side (represented by "A").
QJ 230 N2MA Bearing Structural Features & Performance Benefits
- High Rigidity & Compact Design: The single row construction with a four-point contact raceway provides high axial and radial stiffness, enabling a compact bearing solution that saves space and weight.
- Superior Load Capacity: Engineered for combined loads, this bearing can handle significant radial forces and bidirectional axial thrust. With a dynamic load rating of 90,000 lbf and a static load rating of 128,250 lbf, it is built for durability.
- Precision & Reliability: The P6 tolerance class ensures high running accuracy, while the brass cage offers superior strength and guidance at moderate limiting speeds (up to 4,000 rpm).
- Simplified Installation: The inclusion of snap rings (N2) on the outer ring facilitates easier and more secure mounting, reducing assembly time and complexity.
QJ 230 N2MA Bearing Typical Application Areas
This bearing is ideally suited for heavy-duty applications where space is constrained and high load capacity is critical. Key industries and machinery include:
- Industrial Gearboxes
- Construction and Mining Equipment
- Material Handling Systems
- Pump and Compressor Units
- Heavy-Duty Turntables and Slewing Rings
