W 628/8-2Z/VT378
W Series Stainless Steel Miniature Bearings
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W 628/8-2Z/VT378 Bearing Product Overview & Core Advantages
The W 628/8-2Z/VT378 is a metric single row deep groove ball bearing engineered for precision and reliability in compact applications. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its key advantage lies in its ability to efficiently handle radial loads while its shielded design, pre-lubricated with high-performance grease, ensures long-term, maintenance-free operation within a wide temperature range. This makes it an ideal choice for applications demanding high rotational accuracy and durability in constrained spaces.
W 628/8-2Z/VT378 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Interpretation | Technical Significance |
|---|---|---|
| W 628/8 | Basic Designation | Indicates a deep groove ball bearing series with an 8 mm bore. |
| -2Z | Seal Type | Specifies shielded bearings on both sides, offering effective protection against contaminants while maintaining a low friction torque. |
| /VT378 | Lubrication | Denotes the bearing is pre-lubricated with a specific grease suitable for the specified temperature range (-30° to 120 °C). |
W 628/8-2Z/VT378 Bearing Structural Features & Performance Benefits
Compact & Robust Design: With dimensions of 8x16x5 mm (Bore x OD x Width), this bearing is designed for space-critical applications. The single row of balls provides a robust and simple solution for radial support.
High-Speed Capability: The combination of a stainless steel cage, precision-ground components, and optimized lubrication allows for a limiting speed of 45,000 rpm, making it suitable for high-speed spindles and rotors.
Corrosion Resistance & Longevity: All critical components, including rings, balls, and cage, are made from stainless steel. This, combined with the shielded (2Z) design and factory-applied grease, provides excellent protection against corrosion and particulate ingress, resulting in a long service life with minimal maintenance.
Precision Performance: Manufactured to P0 tolerance class and standard CN radial internal clearance, this bearing ensures smooth and quiet operation, contributing to the overall precision of the assembly.
W 628/8-2Z/VT378 Bearing Typical Application Areas
This bearing is ideally suited for a wide range of applications requiring miniature size, high speed, and corrosion resistance:
- Small Electric Motors: Used in high-speed fans, drones, and precision tools.
- Medical and Dental Equipment: Ideal for handheld devices, pumps, and scanners where reliability and cleanliness are paramount.
- Precision Instruments: Suitable for optical encoders, gauges, and laboratory equipment.
- Office Automation: Found in printers, scanners, and small drive mechanisms.
- Food Processing and Packaging Machinery: Its stainless steel construction meets hygiene requirements in corrosive environments.
