QJ 219 N2PHAS
Four-Point Contact Bearings Ball Bearings
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Basic Information
Main Dimensions
Inner Ring Dimensions
Outer Ring Dimensions
Performance
Materials
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QJ 219 N2PHAS Bearing Product Overview & Core Advantages
The QJ 219 N2PHAS is a high-precision four-point contact ball bearing engineered for demanding applications requiring exceptional rigidity and load capacity. This single row bearing is designed to simultaneously accommodate combined radial and axial loads from both directions, making it an ideal, compact solution for high-rigidity mounting arrangements. Manufactured to a P6 (ABEC-3) tolerance class, it delivers the accuracy and reliability necessary for precision machinery. Its optimized design ensures stable performance within a wide operating temperature range.
QJ 219 N2PHAS Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| QJ 219 | Standard designation for a four-point contact ball bearing with a 95mm bore and 170mm OD. |
| N2 | Indicates snap ring grooves on the outer ring, facilitating secure axial location within a housing. |
| P | Specifies the P6 tolerance class, equivalent to ABEC-3, ensuring high running accuracy. |
| H | Denotes a special internal clearance group, optimized for specific preload or operational conditions. |
| A | Refers to a modified internal design and optimized contact angle for enhanced axial load capacity. |
| S | Identifies the cage material as PEEK (Polyetheretherketone), contributing to low friction and high-speed capability. |
QJ 219 N2PHAS 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, functioning similarly to a matched pair of angular contact bearings in a more compact envelope. This results in significant space and weight savings.
High Rigidity and Load Capacity: With a radial dynamic load rating of 47,700 lbf and a static load rating of 52,200 lbf, this bearing provides robust support for heavy and fluctuating loads, ensuring long-term operational stability.
High-Speed Performance: The lightweight and durable PEEK cage minimizes centrifugal forces, reduces friction, and allows for a limiting speed of 6,700 rpm, making it suitable for high-velocity spindles and rotors.
Precision Engineering: Conforming to the P6 tolerance class, the bearing guarantees precise running accuracy and minimal vibration, which is critical for applications demanding high positional repeatability.
QJ 219 N2PHAS Bearing Typical Application Areas
The QJ 219 N2PHAS is ideally suited for high-performance applications across various industries, including:
- Machine Tool Spindles: Provides high rigidity and accuracy for milling, grinding, and turning centers.
- Industrial Robots and Rotary Tables: Offers precise motion control and high moment load capacity.
- Aerospace Actuation Systems: Used in flight control mechanisms and other critical systems requiring reliability and compactness.
- High-Speed Pumps and Compressors: Handles combined loads at elevated rotational speeds.
- Precision Medical and Laboratory Equipment: Ensures smooth, accurate, and vibration-free operation.
