W 625-2Z/VT378
W Series Stainless Steel Miniature Bearings
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Part No.
Part No.
W 625-2Z/VT378
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0049 kg
Tolerance class
P0
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
5 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
16 mm
Outside diameter tolerance
-0.008mm to 0
Width
5 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
321 lbf
Radial static load rating
142 lbf
Limiting speed
50 X 1000 rpm
Lubrication
Grease
Radial internal clearance
CN
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
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W 625-2Z/VT378 Bearing Product Overview & Core Advantages
The W 625-2Z/VT378 is a single row deep groove ball bearing designed for exceptional performance in compact spaces. Constructed entirely from stainless steel, it offers excellent corrosion resistance. Its key advantage lies in its ability to handle radial loads efficiently while also accommodating moderate axial loads in both directions. The shielded (2Z) design, combined with factory-applied grease lubrication, ensures long service life and reliable operation, making it a maintenance-free solution for applications demanding high reliability and cleanliness.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| W 625 | Basic bearing designation, indicating a single row deep groove ball bearing with a 5 mm bore and 16 mm outside diameter. |
| -2Z | Bearing is equipped with non-contact shields on both sides. This provides effective protection against contamination while minimizing friction, contributing to the bearing's high limiting speed. |
| /VT378 | Specifies the type of high-performance grease used for lubrication. This grease is suitable for the specified temperature range of -30°C to 120°C, ensuring consistent performance. |
W 625-2Z/VT378 Bearing Structural Features & Performance Benefits
- Robust Stainless Steel Construction: All components, including rings, balls, and cage, are made of stainless steel, providing superior corrosion resistance and making it ideal for harsh environments or applications requiring washdown.
- Optimized Load Capacity: The deep groove raceway and single-row design are engineered to support significant radial dynamic and static loads (321 lbf and 142 lbf respectively) within its compact bearing dimensions (5x16x5 mm).
- High-Speed Capability: The combination of a low-friction stainless steel cage and non-contact shields allows for a limiting speed of 50,000 rpm, qualifying it as a high-speed bearing for miniature applications.
- Maintenance-Free Operation: The sealed unit with pre-applied grease is lubricated for life, eliminating the need for re-lubrication and reducing total cost of ownership.
W 625-2Z/VT378 Bearing Typical Application Areas
- Small Electric Motors and Spindles
- Precision Instruments and Optical Encoders
- Medical and Dental Handpieces
- Office Automation Equipment (e.g., printers, scanners)
- Radio-Controlled Models and Drones
- Food Processing and Packaging Machinery (due to stainless steel construction)
