QJ 324 N2MA
Four-Point Contact Bearings Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
Environment & Compliance
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
QJ 324 N2MA Bearing Product Overview & Core Advantages
The QJ 324 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 radial loads and axial loads from both directions with a single bearing row. Manufactured to P6 (ABEC-3) tolerance class, it delivers high running accuracy and reliability. Its compact design, combined with a high dynamic load rating of 93,375 lbf, makes it an ideal solution for space-constrained, high-rigidity applications requiring long service life.
QJ 324 N2MA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| N2 | Indicates the bearing has two machined circumferential grooves on its outer ring for the positioning of locking collars or sensor rings. |
| MA | Signifies that the bearing is lubricated with a specific high-performance grease suitable for the specified temperature range. |
QJ 324 N2MA Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The unique raceway geometry allows the bearing to handle combined radial and bidirectional axial loads efficiently with a single row of balls, resulting in a compact bearing size (55mm width) and reduced component count.
- High Load Capacity & Rigidity: The optimized contact angle and robust chrome steel construction contribute to a high static load rating of 119,250 lbf, providing excellent stability and resistance to deformation under heavy loads.
- Precision & High-Speed Capability: The P6 tolerance class ensures precise shaft guidance and smooth operation. The brass cage provides high strength and stability, supporting the bearing's limiting speed of 4,500 rpm.
- Pre-lubricated & Ready-to-Install: The bearing is supplied lubricated, simplifying installation and providing immediate protection, suitable for a wide temperature range from -30°C to 110°C.
QJ 324 N2MA Bearing Typical Application Areas
The QJ 324 N2MA is ideally suited for heavy-duty industrial machinery where high rigidity and combined loading are critical. Key applications include:
- Industrial Gearboxes and power transmission systems
- Large-Diameter Slewing Rings for construction and mining equipment
- Machine Tool Turntables and indexing heads
- Wind Turbine Yaw and Pitch Systems
- Material Handling Equipment
