Linear bushings are a type of linear bearing based on round or modified round shaft upon which an engineered cylindrical bushing (studded on its inner diameter with rollers) rides. A related technology — that of ball splines — are a type of linear bearing based on round shaft having precision-machined grooves down its axial length. Riding upon this is a sleeve-shaped cylindrical nut with geometry compatible with the shaft’s geometry.
In this Design Guide, the editors of Design World detail the most common linear bushing and ball spline types for motion control — as well best practices for sizing, selection, and installation.
Deeper dive on the differences between linear bushings and ball splines
More on linear-bushing installations and self-aligning variations
How to choose between round shaft or profiled rail
How to make sure you get the right linear bushing interchange
The many facets of linear bushing life and more...