QJ 220 N2MA
Four-Point Contact Bearings Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
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QJ 220 N2MA Bearing Product Overview & Core Advantages
The QJ 220 N2MA is a metric single row four-point contact ball bearing engineered for exceptional performance in demanding applications. This precision bearing is distinguished by its ability to simultaneously support substantial combined loads, including radial loads and axial loads from both directions, within a compact cross-section. Manufactured to a P6 (ABEC-3) tolerance class, it delivers high running accuracy and reliability, making it an ideal solution for high-precision machinery requiring robust support and long service life.
QJ 220 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| QJ 220 | Denotes the bearing series and basic size (100mm bore, 180mm OD, 34mm width). |
| N2 | Indicates the bearing has two machined grooves in the outer ring for snap ring mounting, enhancing axial location and security. |
| MA | Signifies that the bearing is lubricated with a specific high-performance grease suitable for the specified temperature range. |
QJ 220 N2MA Bearing Structural Features & Performance Benefits
Four-Point Contact Design: The unique raceway geometry allows a single row bearing to handle combined radial and bidirectional axial loads efficiently, offering a compact and lightweight solution compared to traditional bearing pairs.
High Load Capacity: With a dynamic load rating of 53,100 lbf and a static load rating of 59,625 lbf, this bearing is built to withstand significant operational stresses.
Precision & Rigidity: The P6 tolerance class ensures high dimensional accuracy and consistent performance. The brass cage provides excellent guidance and stability, contributing to smooth operation at the limiting speed of 6,300 rpm.
Enhanced Mounting & Reliability: The inclusion of snap ring grooves (N2) simplifies axial positioning and secures the bearing within the housing. The pre-applied lubrication (MA) ensures immediate and reliable operation upon installation.
QJ 220 N2MA Bearing Typical Application Areas
The QJ 220 N2MA is ideally suited for applications requiring high precision and the ability to manage complex load scenarios. Key industries and equipment include:
- Industrial Robots (particularly in robotic arms and rotary joints)
- Precision Rotary Tables and Indexing Heads
- Machine Tool Spindles and Turrets
- Aerospace Actuation Systems
- Radar and Satellite Communication Equipment
