Linear motion, also called rectilinear motion is a one dimensional motion along a straight line, and can therefore be described mathematically using only one spatial dimension. linear bushings are used with shafts and reduce friction in both axial and linear motions. Pillow block bearings, also known as plummer blocks, are bearings encased in a housing designed to offer support to rotating shafts. Shaft supports are used when a ball bushing needs support, and matched with shafts. FUSCO provides the full range of linear motion products for your application, you will find the suitable items for your needs.