W 618/2
W Series Stainless Steel Miniature Bearings
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Materials
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W 618/2 Bearing Product Overview & Core Advantages
The W 618/2 is a metric miniature deep groove ball bearing designed for applications requiring high precision and compact design. As a single row radial bearing with an open design, it excels in handling primarily radial loads in high-speed scenarios. Its construction from stainless steel throughout provides excellent corrosion resistance, making it suitable for demanding environments. The bearing's extremely small dimensions and low weight make it ideal for applications where space and mass are critical constraints.
W 618/2 Bearing Model Code Explained, Specifications & Naming Convention
The model number W 618/2 can be broken down as follows:
- W: Indicates a stainless steel bearing series.
- 618: Denotes the bearing series, specifically a deep groove ball bearing with extremely small cross-sectional dimensions.
- /2: Specifies the bore diameter code. In this metric series, the "2" corresponds to a 2 mm bore diameter.
Key Specification Highlights: The absence of any seal suffix (Open) allows for higher limiting speeds. The P0 tolerance class and CN radial internal clearance are standard for this series, ensuring reliable performance in general applications.
W 618/2 Bearing Structural Features & Performance Benefits
The W 618/2's performance is derived from its specific construction and material selection:
- Compact & Lightweight Design: With dimensions of 2x5x1.5 mm and a weight of only 0.0001 kg, it is engineered for miniature assemblies and precision instruments.
- High-Speed Capability: The open, unsealed design and stainless steel cage contribute to a high limiting speed of 120,000 rpm, making it a true high-speed bearing.
- Corrosion Resistance: Manufactured entirely from stainless steel (rings, balls, and cage), it offers superior protection against corrosion, extending service life in harsh conditions.
- Precision Engineering: Built to P0 tolerance class with standard CN clearance, it provides consistent and reliable running accuracy for smooth operation.
W 618/2 Bearing Typical Application Areas
This miniature deep groove ball bearing is commonly specified in:
- Precision Instruments: Optical encoders, medical devices, and laboratory equipment.
- Small Motors: Miniature DC motors, stepper motors, and spindle drives for small tools.
- Office Automation Equipment: Printers, scanners, and copiers.
- Robotics and Automation: Small joints, guides, and actuators in compact robotic systems.
- Consumer Electronics: Drones, small fans, and high-speed miniature drives.
