618/8/W64
618 & 619 Series Thin Section Bearings
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Part No.
Part No.
618/8/W64
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
0.0007 kg
Tolerance class
ABEC 1 | ISO P0
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
4 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
9 mm
Outside diameter tolerance
-0.007mm to 0
Width
2.5 mm
Width tolerance
-0.12mm to 0
Performance
Temperature range
-30°to 120 °C
Radial dynamic load rating
95 lbf
Radial static load rating
26 lbf
Limiting speed
85 X 1000 rpm
Lubrication
Soild Oil
Radial internal clearance
CN
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Chrome Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
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In Stock
Price available upon request.
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618/8/W64 Bearing Product Overview & Core Advantages
The 618/8/W64 is a miniature deep groove ball bearing designed for applications demanding compact size and reliable performance. This metric single row bearing excels in handling primarily radial loads with high efficiency. Its open design and Solid Oil lubrication provide a robust solution for high-speed operation and long-term reliability in confined spaces, making it ideal for precision instruments and small machinery where space and weight are critical constraints.
618/8/W64 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 618 | Series designation for extra small, deep groove ball bearings. |
| 8 | Bore diameter code, corresponding to a 4 mm bore diameter. |
| W64 | Designates the Solid Oil lubrication system, offering consistent lubrication and protection against oil leakage. |
618/8/W64 Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of an open design and advanced Solid Oil lubrication enables a high limiting speed of 85,000 rpm, making it suitable for demanding high-speed applications.
- Robust Construction: Manufactured entirely from Chrome Steel for rings, balls, and cage, ensuring high strength, durability, and consistent performance under load.
- Maintenance-Free Operation: The integrated Solid Oil system provides lifelong lubrication, eliminating the need for re-lubrication and reducing maintenance costs.
- Precision Performance: Built to ABEC 1 | ISO P0 tolerance class and standard CN radial internal clearance, guaranteeing smooth and precise operation for general precision requirements.
618/8/W64 Bearing Typical Application Areas
- Small Electric Motors and Spindles
- Precision Instruments and Optical Encoders
- Office Automation Equipment (e.g., Printers, Scanners)
- Medical Devices and Dental Handpieces
- Radio-Controlled Models and Drones
- Computer Cooling Fans
