QJ 313 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 313 N2PHAS Bearing Product Overview & Core Advantages
The QJ 313 N2PHAS is a four-point contact ball bearing designed for applications requiring exceptional precision and load handling capabilities. As a single-row bearing with a P6 (ABEC-3) tolerance class, it delivers high running accuracy and reliability. Its defining characteristic is its ability to simultaneously support combined loads—significant radial loads and axial loads in both directions—making it an ideal, compact solution for demanding industrial environments. The use of a Peek cage and optimized internal geometry contributes to its high-performance characteristics.
QJ 313 N2PHAS Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| QJ 313 | Basic bearing designation indicating a four-point contact ball bearing with a 65mm bore and 140mm outside diameter. |
| N2 | Indicates snap ring grooves on the outer ring, facilitating secure axial location in the housing. |
| P | Designates the bearing is supplied with a Peek (Polyetheretherketone) cage, offering excellent strength and performance at high speeds and temperatures. |
| H | Signifies the bearing is pre-lubricated from the factory. |
| A | Denotes a modified internal design for optimized contact angle and load distribution. |
| S | Indicates the bearing rings and rolling elements are made of chrome steel. |
QJ 313 N2PHAS Bearing Structural Features & Performance Benefits
Four-Point Contact Design: The unique raceway geometry allows a single bearing to handle combined radial and bidirectional axial loads efficiently, simplifying assembly and saving space compared to traditional bearing pairs.
High Precision & Rigidity: Manufactured to P6 (ABEC-3) tolerance standards, this bearing ensures precise shaft guidance and minimal runout, which is critical for high-accuracy applications. The optimized shoulder diameters further enhance system rigidity.
High-Speed Capability: The lightweight and robust Peek cage minimizes centrifugal forces, reduces friction, and enables a high limiting speed of 8,500 rpm.
Robust Load Capacity: With a dynamic load rating of 39,600 lbf and a static load rating of 35,100 lbf, it is engineered for demanding operational conditions and long service life.
Convenient Mounting: The inclusion of snap ring grooves (N2 suffix) provides a simple and effective method for axial location within the housing.
QJ 313 N2PHAS Bearing Typical Application Areas
The QJ 313 N2PHAS is ideally suited for a wide range of precision machinery and industrial equipment, including:
- Industrial Robots (especially in wrist and arm joints)
- Machine Tool Components (e.g., rotary tables, indexing heads)
- Gearboxes and Transmission Systems
- Medical Equipment (e.g., CT scanners, high-speed centrifuges)
- Aerospace Actuation Systems
- Radar and Antenna Positioning Systems
