QJ 304 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 304 N2PHAS Bearing Product Overview & Core Advantages
The QJ 304 N2PHAS is a four-point contact ball bearing designed for exceptional performance in demanding applications. As a single-row metric bearing with a P6 (ABEC-3) tolerance class, it delivers high precision and reliability. Its unique four-point contact design enables it to simultaneously support combined radial and axial loads from both directions, making it an extremely compact and versatile solution. The use of a Peek cage and optimized internal geometry contributes to its high limiting speed of 24,000 rpm, establishing it as a high-performance component for precision machinery.
QJ 304 N2PHAS Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| N2 | Specific internal design and snap ring groove modification | Enhances mounting stability and axial location. |
| P | Glass-fiber reinforced PEEK (Polyetheretherketone) cage | Provides high strength, low friction, and excellent performance at high speeds and temperatures. |
| H | Hardened bearing rings | Increases durability and wear resistance for a longer service life. |
| A | Optimized internal geometry for higher load capacity | Enhances the radial dynamic load rating (7200 lbf) and static load capacity. |
| S | Bearing is pre-lubricated | Ensures immediate operational readiness and simplifies initial installation. |
QJ 304 N2PHAS Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: This core structural feature allows the bearing to handle combined loads efficiently. A single bearing row can accommodate axial loads in either direction, significantly saving space and weight compared to traditional bearing pairs.
- High-Speed Capability: The lightweight and robust Peek cage minimizes centrifugal forces, reduces friction, and ensures stable operation at the high limiting speed of 24,000 rpm.
- High Precision & Rigidity: Manufactured to P6 tolerance class, this bearing guarantees precise running accuracy. The hardened rings and optimized contact angle contribute to high system rigidity.
- Superior Load Ratings: With a dynamic load rating of 7200 lbf and a static load rating of 4860 lbf, it is engineered for demanding applications requiring high load capacity in a compact bearing size (20mm bore, 52mm OD).
- Wide Operating Range: The bearing operates effectively within a temperature range of -30°C to 110°C, making it suitable for various industrial environments.
QJ 304 N2PHAS Bearing Typical Application Areas
The QJ 304 N2PHAS is ideally suited for high-precision and high-speed machinery where space is at a premium and reliability is critical. Key application areas include:
- Machine Tool Spindles
- Industrial Robots and Manipulators
- Precision Gearboxes
- High-Speed Pumps and Compressors
- Aerospace Actuation Systems
- Medical and Laboratory Equipment
