618/2
618 & 619 Series Thin Section Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Performance
Materials
Environment & Compliance
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
618/2 Bearing Product Overview & Core Advantages
The 618/2 is a metric miniature deep groove ball bearing designed for precision applications requiring compact dimensions and reliable performance. As a single row radial bearing with an open design, it excels in handling primarily radial loads while maintaining low friction. Its small footprint, with a 4 mm bore and 9 mm outside diameter, makes it ideal for space-constrained assemblies. Manufactured to ABEC 1 precision class with standard radial internal clearance (CN), this bearing offers a cost-effective solution for high-speed operation up to 85,000 rpm, providing excellent rotational accuracy and durability in demanding miniature mechanical systems.
618/2 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 618 | Series designation for miniature deep groove ball bearings |
| /2 | Width series designation (2.5 mm width) |
| Open | No seals or shields, allowing for high-speed operation and easy relubrication |
| None (Lubrication) | Supplied without grease, enabling application-specific lubrication selection |
618/2 Bearing Structural Features & Performance Benefits
This bearing features a single row deep groove raceway that provides optimal stress distribution and smooth operation. The chrome steel construction of rings, balls, and cage ensures consistent performance and corrosion resistance. The open design minimizes friction torque, contributing to its impressive limiting speed of 85,000 rpm. With a radial dynamic load rating of 95 lbf and static rating of 26 lbf, it delivers reliable performance in compact spaces. The ABEC 1 precision guarantees consistent running accuracy, while the standard CN clearance provides optimal fit for most applications without requiring special ordering.
618/2 Bearing Typical Application Areas
- Small precision motors and miniature DC motors
- Medical devices and dental handpieces
- Office automation equipment including printers and scanners
- Instrumentation and measuring devices
- Robotics and miniature automation systems
- Optical equipment and lens positioning mechanisms
- Consumer electronics requiring precise rotational components
