Linear roller bearing using extruded square bar - has pair of rollers running on each face of bar

摘要

A linear bearing utilises an extruded square bar (1) of ordinary commercial quality. The bar is guided by pairs of rollers (5) which run on each face of the bar. The rollers run on ball bearings on the shafts (4) which are supported by four smaller square bars (3) which fit in a sheet metal housing (2). The play between the central bar and the rollers is adjusted by screws (10) which screw into tapped holes in the housing. The design can be adapted to use a central bar of circular cross section.