QJ 208 PHAS
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 208 PHAS Bearing Product Overview & Core Advantages
The QJ 208 PHAS is a metric four-point contact ball bearing designed for applications requiring exceptional precision and load handling capabilities. This single-row bearing excels at simultaneously supporting combined radial and axial loads from both directions, making it an ideal solution for compact, high-rigidity arrangements. Manufactured to P6 (ABEC-3) tolerance class, it delivers the dimensional accuracy and rotational precision necessary for demanding industrial machinery and precision instruments. Its optimized design ensures reliable performance within a wide temperature range from -30°C to 110°C.
QJ 208 PHAS Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Impact |
|---|---|---|
| PHAS | Four-Point Contact Design | Enables the bearing to handle combined radial and bidirectional axial loads efficiently in a compact single-row design. |
| Open (Seal Type) | No integral seals or shields | Optimized for applications where external sealing is provided, allowing for potential higher speed operation. |
| Lubricated | Pre-lubricated at factory | Ensures immediate operational readiness and initial protection, suitable for the specified temperature range. |
QJ 208 PHAS Bearing Structural Features & Performance Benefits
- Four-Point Contact Design: The unique raceway geometry allows a single bearing to support significant axial loads in both directions, as well as radial loads, simplifying assembly and saving space compared to traditional bearing pairs.
- High Rigidity & Load Capacity: With a dynamic load rating of 12,600 lbf and a static load rating of 11,025 lbf, this bearing is engineered for applications with substantial combined loads. The defined shoulder diameters ensure secure mounting and stable operation.
- Precision & High-Speed Capability: Manufactured to a P6 tolerance class and featuring a lightweight, durable PEEK cage, the bearing maintains stability and low vibration at its limiting speed of 15,000 rpm.
- Premium Material Construction: Both rings and balls are made from chrome steel, providing high hardness, wear resistance, and long service life under demanding conditions.
QJ 208 PHAS Bearing Typical Application Areas
The QJ 208 PHAS is ideally suited for precision applications where space is limited and load requirements are complex. Key industries and equipment include:
- Robotics: Joint and arm articulation systems requiring compact, high-load bearings.
- Machine Tools: Rotary tables, indexing heads, and other precision positioning systems.
- Aerospace & Defense: Actuators, control surface mechanisms, and radar systems.
- Industrial Automation: High-precision rotary stages and automated assembly equipment.
