W 618/7
W Series Stainless Steel Miniature Bearings
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W 618/7 Bearing Product Overview & Core Advantages
The W 618/7 is a metric single row deep groove ball bearing designed for high-performance radial load applications. Constructed entirely from stainless steel, it offers excellent corrosion resistance and is suitable for demanding environments. Its compact design, with a 7 mm bore and 3.5 mm width, makes it ideal for applications where space is limited. The bearing features an open seal type and comes without lubrication, providing flexibility for specialized lubrication requirements. With a P0 tolerance class and standard CN radial internal clearance, it delivers reliable and precise operation.
W 618/7 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| W | Indicates a stainless steel deep groove ball bearing. |
| 618 | Denotes the bearing series, characterizing its cross-sectional dimensions and load capacity. |
| /7 | Specifies the bore diameter of 7 mm. |
Note: The absence of additional suffixes indicates an open (unsealed) design and no pre-applied lubrication.
W 618/7 Bearing Structural Features & Performance Benefits
- Full Stainless Steel Construction: The rings, balls, and cage are manufactured from stainless steel, providing superior corrosion resistance and making the bearing suitable for washdown environments, medical equipment, and food processing applications.
- High-Speed Capability: The deep groove raceway and precision-ground components enable a limiting speed of 63,000 rpm, supporting high-speed operation in compact assemblies.
- Radial Load Capacity: Engineered to handle significant radial dynamic loads (149 lbf) and static loads (58 lbf) efficiently, ensuring long service life.
- Precision & Reliability: Manufactured to P0 tolerance class with standard CN radial internal clearance, guaranteeing consistent performance and smooth running.
- Wide Temperature Range: Operates effectively within a temperature range of -30°C to 120°C.
W 618/7 Bearing Typical Application Areas
The W 618/7 is ideally suited for a wide range of precision applications, including:
- Small Electric Motors and miniature gearboxes
- Medical Devices and dental handpieces
- Precision Instruments and optical encoders
- Office Automation Equipment such as printers and scanners
- Robotics and small machinery requiring compact bearing dimensions
