QJ 212 N2MA
Four-Point Contact Bearings Ball Bearings
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Part No.
Part No.
QJ 212 N2MA
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.99 kg
Tolerance class
P6 (ABEC-3)
Seal type
Open
For load direction
Four Point Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
110 mm
Outside diameter tolerance
-0.013mm to 0
Width
22 mm
Width tolerance
-0.05mm to 0
Chamfer dimension
1.5 mm
Distance from side face to load point
60 mm
Inner Ring Dimensions
Inner ring large-side shoulder diameter
72 mm
Outer Ring Dimensions
Shoulder diameter outer ring
93 mm
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
21712 lbf
Radial static load rating
20925 lbf
Limiting speed
10 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
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QJ 212 N2MA Bearing Product Overview & Core Advantages
The QJ 212 N2MA is a metric single row four-point contact ball bearing engineered for applications requiring exceptional precision and load handling capabilities. This bearing is specifically designed to simultaneously accommodate combined radial and axial loads from both directions, making it an ideal solution for compact, high-rigidity arrangements. Manufactured to a P6 (ABEC-3) tolerance class, it delivers high running accuracy and reliable performance in demanding operational environments.
QJ 212 N2MA Bearing Model Code Explained, Specifications & Naming Convention
The QJ 212 N2MA model designation provides detailed technical specifications:
- QJ 212: Denotes the bearing series and basic dimensions (60mm bore, 110mm OD, 22mm width).
- N2: Indicates the bearing has two integral machined brass windows on the outer ring for snap ring mounting.
- MA: Specifies that the bearing is pre-lubricated with a high-performance lithium-based grease suitable for the designated temperature range.
QJ 212 N2MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The optimized raceway geometry allows the bearing to handle significant combined loads (radial and bidirectional axial) with a single bearing row, offering a compact and space-saving solution.
- High Rigidity & Precision: The P6 tolerance class ensures precise internal geometry and shaft runout control, while the robust construction provides high rigidity for stable operation under load.
- Optimized Load Capacity: With a dynamic load rating of 21,712 lbf and a static load rating of 20,925 lbf, this bearing is built for demanding applications requiring long service life.
- High-Speed Capability: The brass cage ensures dimensional stability and low friction at high speeds, supporting a limiting speed of 10,000 rpm.
- Pre-Lubricated & Ready-to-Use: The factory-applied MA grease provides immediate lubrication for the bearing's operational life within the specified -30°C to 110°C temperature range.
QJ 212 N2MA Bearing Typical Application Areas
This bearing is ideally suited for high-precision and high-load applications, including:
- Industrial Robotics: Rotary joints and arm linkages.
- Machine Tool Spindles and indexing tables.
- Gearboxes and transmission systems.
- Precision Turntables and slewing rings.
- Medical and Semiconductor Equipment requiring high accuracy and reliability.
