Plain Bearing Introduction

Plain bearings, also known as bushings, shaft sleeves, or sleeve bearings, are usually cylindrical in shape and do not contain any moving parts. Standard configurations include cylindrical bearings for radial loads, flanged bearings for radial and light axial loads, thrust washers and flanged washers for heavy axial loads, and various shapes of slide blocks. They can also be custom-designed, including special shapes, features (grooves, oil holes, notches, protrusions, etc.), and dimensions.
Plain bearings are used for sliding, rotating, oscillating, or reciprocating motions. In sliding applications, they are used as sliding bearings, bearing bars, and wear plates. In these applications, the sliding surface is usually flat but can also be cylindrical, and the motion is always linear, not rotational. Rotational applications involve cylindrical surfaces and one or two travel directions. Swing and reciprocating motion applications are for flat or cylindrical surfaces but with bidirectional travel.

The structure of plain bearings can be solid or split (wrapped bearings) for ease of installation. It is important to match the bearing with the application. High-load requirements require larger contact areas and high load-carrying capacity. Bearing designs with solid lubricants can work at higher temperatures compared to oil/grease lubricated bearings. Special lubricants are required for high-speed applications to minimize heat build-up and friction. The manufacture of plain bearings has different structures, and product selection depends on the operating conditions and performance requirements of the application.
In conclusion, Plain bearings are essential components in many machines and equipment, providing support and reducing friction in various motion applications. With different designs, materials, and lubrication options, Plain bearings can be tailored to meet the requirements of specific applications.