Lubrication and operation characteristics of clevis rod ends

- Jul 24, 2019-

The sliding guide of the clevis rod end is characterized in that a medium is used between the guide rail and the sliding member. The types of the medium include solid anti-friction materials, oil and air, and the sliding guide rails are thus classified into different types. Ordinary anti-friction guide rails are equipped with a solid anti-friction material such as polyvinyl chloride or bronze mixed material on the moving component to reduce the friction of the guide rail. Anti-friction materials should be designed with oil grooves to meet the needs of oil lubrication or other forms of lubrication between moving parts and rail surfaces.


The U-shaped rod end is widely used as a hydraulic medium, and a typical representative is a hydrostatic guide. Under the action of pressure, the hydraulic oil enters the groove of the sliding assembly, forming an oil film between the guide rail and the sliding assembly, and isolating the guide rail from the moving component, thereby greatly reducing the friction force of the moving component and thereby lubricating effect.


The U-shaped rod end static pressure guide rail has a good effect on the lubrication of large load movement, and also has a certain compensation effect on the eccentric load. For example, when a machine tool is machining a large sand box, the sand box just moves to the end of the machine stroke. At this time, the static pressure rail can increase the oil pressure, so that the rail still maintains the horizontal load state accurately. Some horizontal boring and milling machines also use this technique to compensate for the drop in spindle speed during deep hole machining.