W 618/1.5
W Series Stainless Steel Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
W 618/1.5
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0001 kg
Tolerance class
P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
1.5 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
4 mm
Outside diameter tolerance
-0.008mm to 0
Width
1.2 mm
Width tolerance
-0.04mm to 0
Performance
Temperature range
-30° to 120 °C
Radial dynamic load rating
14 lbf
Radial static load rating
4 lbf
Limiting speed
140 X 1000 rpm
Lubrication
None
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
No drawings available at the moment, will be launched soon
In Stock
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W 618/1.5 Bearing Product Overview & Core Advantages
The W 618/1.5 is a metric miniature deep groove ball bearing designed for applications demanding high precision and compact design. As a single row, open type bearing, it excels in handling primarily radial loads. Its construction from stainless steel throughout (rings, balls, and cage) provides excellent corrosion resistance, making it suitable for harsh environments. With a very small bore diameter of 1.5 mm and an overall compact profile, it is the ideal solution for miniaturized mechanisms requiring reliable rotational performance.
W 618/1.5 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| W | Designates a series of stainless steel deep groove ball bearings. |
| 618 | Indicates the bearing series, defining the cross-sectional dimensions and basic design. |
| 1.5 | Specifies the bore diameter in millimeters. |
| (No Suffix) | The absence of additional suffixes confirms the open (unsealed) design and standard CN radial internal clearance. |
W 618/1.5 Bearing Structural Features & Performance Benefits
- Compact and Lightweight Design: With an outside diameter of just 4 mm and a width of 1.2 mm, this bearing offers a minimal footprint and a weight of only 0.0001 kg, crucial for space-constrained and weight-sensitive applications.
- Corrosion Resistance: The all-stainless steel construction ensures reliable operation in environments exposed to moisture and chemicals, enhancing longevity.
- High-Speed Capability: The stainless steel cage and optimized geometry contribute to a high limiting speed of 140,000 rpm, enabling use in high-speed miniature spindles and tools.
- Precision Performance: Manufactured to P0 tolerance class with a controlled CN radial internal clearance, this bearing provides consistent running accuracy and low vibration.
- Application Flexibility: The open design allows for custom lubrication schemes tailored to specific operational needs, though it can also run with minimal lubrication in certain conditions.
W 618/1.5 Bearing Typical Application Areas
The W 618/1.5 is engineered for precision instruments and miniaturized devices, including:
- Small Precision Motors and stepper motors
- Medical Devices such as surgical hand tools and dental drills
- Optical Encoders and instrumentation
- Miniature Gearboxes and drive mechanisms
- High-speed Small Spindles for PCB drilling and engraving
- Office automation equipment and robotics joints
