618/4
618 & 619 Series Thin Section Bearings
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Basic Information
Main Dimensions
Performance
Materials
Environment & Compliance
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618/4 Bearing Product Overview & Core Advantages
The 618/4 is a single row deep groove ball bearing designed for high-precision applications requiring compact dimensions. As a metric miniature bearing, it excels in handling radial loads with excellent operational smoothness. Its open design and P6 tolerance class ensure superior running accuracy, making it ideal for applications demanding high reliability and precise rotational performance in confined spaces.
618/4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 618 | Series designation for deep groove ball bearings with extremely low cross-section |
| 4 | Bore diameter: 4 mm |
| (No suffix) | Open bearing without seals or shields |
618/4 Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P6 tolerance class with tight dimensional control for superior running accuracy and minimal vibration.
Material Excellence: Features chrome steel rings and balls combined with a stainless steel cage for excellent durability and corrosion resistance.
Compact Design: With dimensions of only 4×9×2.5 mm, this miniature bearing provides reliable performance in space-constrained applications.
High-Speed Capability: The optimized design supports limiting speeds up to 85,000 rpm, making it suitable for high-speed applications.
Versatile Operation: Capable of operating within a temperature range of -30°C to 120°C without lubrication, though external lubrication can enhance performance.
618/4 Bearing Typical Application Areas
- Precision instruments and measuring devices
- Small motors and miniature gearboxes
- Medical equipment and dental handpieces
- Office automation equipment and printers
- Robotics and miniature automation systems
- Optical devices and surveillance equipment
