QJ 207 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 207 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.35 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.011mm to 0
Width
17 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
1.1 mm
Distance from side face to load point
37 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
44 mm
Outer Ring Dimensions
Shoulder diameter outer ring
59 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
11025 lbf
Radial static load rating
9338 lbf
Limiting speed
17 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 207 N2MA Bearing Product Overview & Core Advantages
The QJ 207 N2MA is a Four Point Contact Ball Bearing designed for applications requiring high precision and the ability to handle combined loads. Its single-row design with a four-point contact geometry enables it to simultaneously support substantial radial loads and axial loads in both directions, making it an exceptionally compact and versatile solution. Manufactured to a P6 (ABEC-3) tolerance class and pre-lubricated, this bearing is engineered for high reliability and performance in demanding industrial environments.
QJ 207 N2MA Bearing Model Code Explained, Specifications & Naming Convention
The QJ 207 N2MA model number provides key technical specifications:
- QJ: Denotes the bearing series as a Four Point Contact Ball Bearing.
- 207: Specifies the standard boundary dimensions (35mm bore, 72mm OD, 17mm width).
- N2: Indicates a special design feature on the outer ring side, often related to a specific groove or notch for mounting.
- MA: Signifies that the bearing is filled with a specific, high-performance lubricant suitable for the specified temperature range.
QJ 207 N2MA Bearing Structural Features & Performance Benefits
- High Load Capacity & Rigidity: The unique four-point contact design creates two opposing contact angles, allowing a single bearing row to manage combined radial and bidirectional axial loads efficiently. This results in a very stiff and compact bearing arrangement.
- Precision Performance: Built to a P6 tolerance class, this bearing ensures precise running accuracy and minimal vibration, which is critical for high-speed and high-precision applications.
- Optimized for Speed: The brass cage provides excellent guidance and stability, contributing to the bearing's high limiting speed of 17,000 rpm.
- Ready-to-Use & Durable: The bearing is pre-lubricated and features an open seal type, making it ready for immediate installation. The use of chrome steel for rings and balls ensures long service life and high dynamic (11,025 lbf) and static (9,338 lbf) load ratings.
QJ 207 N2MA Bearing Typical Application Areas
This bearing is ideally suited for applications where space is limited and load requirements are complex. Key industries and machinery include:
- Machine Tool Spindles
- Industrial Robots and Robotic Arms
- Precision Gearboxes
- Pumps and Compressors
- Turntable Applications and Indexing Tables
