618/9
618 & 619 Series Thin Section Bearings
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618/9 Bearing Product Overview & Core Advantages
The 618/9 is a metric miniature deep groove ball bearing designed for applications demanding high precision and compact design. As a single row bearing with an open construction, it excels in handling primarily radial loads. Manufactured to a P6 tolerance class, it offers superior running accuracy, making it an ideal precision bearing for high-speed mechanisms and sensitive instrumentation where space is at a premium and reliable performance is critical.
618/9 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Description | Technical Implication |
|---|---|---|
| 618 | Series Designation | Indicates a metric, extra-thin section deep groove ball bearing series. |
| 9 | Bore Diameter | Specifies a 9 mm bore diameter. |
| [Open] | Seal Type | No seals or shields, allowing for higher limiting speeds and customizable lubrication. |
| P6 | Tolerance Class | Denotes a precision tolerance grade for improved running accuracy and reduced vibration. |
618/9 Bearing Structural Features & Performance Benefits
Optimized Miniature Design: With compact bearing dimensions of 9mm bore, 17mm outside diameter, and a mere 4mm width, this bearing is engineered for space-constrained applications without sacrificing performance.
High-Speed Capability: The combination of an open design, a lightweight stainless steel cage, and chrome steel components enables a high limiting speed of 53,000 rpm, qualifying it as a capable high-speed bearing.
Precision & Reliability: The P6 tolerance class ensures tight control over bore diameter and running geometry, resulting in smooth operation, low noise, and extended service life in precision assemblies.
Robust Load Rating: Despite its small size, it offers a radial dynamic load rating of 196 lbf, providing reliable support for radial loads in demanding miniature systems.
618/9 Bearing Typical Application Areas
The 618/9 bearing is ideally suited for a wide range of compact and high-precision devices, including:
- Small Electric Motors: Used in high-speed spindles for drones, dental handpieces, and small power tools.
- Precision Instrumentation: Critical components in optical encoders, measuring instruments, and laboratory equipment.
- Office Automation Equipment: Found in scanners, printers, and copiers where quiet and reliable operation is essential.
- Medical Devices: Suitable for miniature pumps, analyzers, and other portable medical equipment.
