QJ 213 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 213 N2MA Bearing Product Overview & Core Advantages
The QJ 213 N2MA is a metric single row four-point contact ball bearing designed for exceptional performance in demanding applications. This precision bearing is engineered to simultaneously accommodate combined loads, including radial loads and axial loads in both directions, within a compact cross-section. Manufactured to a P6 (ABEC-3) tolerance class, it ensures high running accuracy and reliability. Its optimized internal geometry and high-quality materials contribute to its high load-carrying capacity and extended service life, making it an ideal solution for high-precision machinery.
QJ 213 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| QJ 213 | Basic bearing designation for a four-point contact ball bearing with a 65mm bore. |
| N2 | Indicates snap ring grooves on the outer ring for secure axial location in the housing. |
| MA | Signifies that the bearing is lubricated with a specific high-performance grease suitable for the stated temperature range. |
QJ 213 N2MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The unique raceway geometry allows the bearing to handle combined radial and axial loads from both directions with a single bearing, simplifying assembly and saving space.
- High Load Capacity: With a dynamic load rating of 24,750 lbf and a static load rating of 25,200 lbf, this bearing is built for robust performance under significant stress.
- Precision & Rigidity: The P6 tolerance class ensures precise shaft guidance and low runout, while the single-row construction with a brass cage provides stable operation and high rigidity.
- High-Speed Capability: The brass cage and optimized internal design enable a high limiting speed of 9,500 rpm, making it suitable for high-velocity applications.
- Pre-lubricated & Ready-to-Use: The factory-applied grease (MA suffix) provides immediate protection and reduces initial maintenance requirements.
QJ 213 N2MA Bearing Typical Application Areas
The QJ 213 N2MA is widely used in applications requiring high precision and the ability to support combined loads. Key industries and equipment include:
- Industrial Robots (especially in robotic arm joints and rotary units)
- Machine Tool Rotary Tables and Indexing Heads
- Precision Gearboxes
- Medical and Laboratory Equipment
- Aerospace Actuation Systems
