QJ 318 N2PHAS
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 318 N2PHAS Bearing Product Overview & Core Advantages
The QJ 318 N2PHAS is a four-point contact ball bearing designed for exceptional performance in demanding applications. This single-row 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 P6 (ABEC-3) tolerance class, it delivers high running accuracy and reliability, making it ideal for high-precision machinery requiring robust support and efficient operation.
QJ 318 N2PHAS Bearing Model Code Explained, Specifications & Naming Convention
| QJ 318 | Basic designation for a four-point contact ball bearing with a 90mm bore. |
| N2 | Indicates the bearing has two machined circumferential grooves in the outer ring for lubrication and specific sealing arrangements. |
| P | Specifies the cage material as PEEK (Polyetheretherketone), offering high strength, low friction, and excellent performance at high speeds and temperatures. |
| HA | Denotes that the bearing is lubricated and ready for installation. |
| S | Identifies the rolling elements and rings as being made from chrome steel for high durability and load capacity. |
QJ 318 N2PHAS 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 row, providing a compact and space-saving solution.
High Rigidity and Load Capacity: The robust construction and chrome steel components contribute to high static and dynamic load ratings (68,625 lbf static, 64,125 lbf dynamic), ensuring stable operation under significant stress.
High-Speed Capability: The lightweight and durable PEEK cage minimizes centrifugal forces, reduces friction, and enables a high limiting speed of 6,300 rpm, making it suitable for high-speed applications.
Precision Performance: Manufactured to a P6 tolerance class, this bearing guarantees precise running accuracy and minimal vibration, which is critical for high-performance machinery.
QJ 318 N2PHAS Bearing Typical Application Areas
The QJ 318 N2PHAS is ideally suited for applications requiring high precision, compact design, and the ability to support complex load combinations. Key industries and equipment include:
- Machine Tool Spindles
- Industrial Robots and Robotic Arms
- Turntables and Slewing Rings
- Precision Gearboxes
- Medical and Semiconductor Manufacturing Equipment
