Note 1: Running single screw jack with unguided of linear bushings and shafts or others, should be marked to JACTON sales, require anti-rotation keyed screw jacks.
Note 2: Running big sizes table top and heavy load several units screw jack lift systems, linear bushings and shafts will be recommended as the guides, to prevent the lateral force / side load and keep uniform axial load.

Linear bushings and shafts are designed to support the shafts on which open-type linear bushings run to prevent them from bending under load. Linear bushings and shafts are available in ready-to-mount sections noted for accuracy and rigidity. Linear bushings and shafts rails prevent deflection and increase efficiency and are available plain or pre-drilled in both inch and metric sizes.
Linear bushings and shafts for linear applications are available as stand alone blocks or as rails. Linear bushings and shafts blocks provide a means of supporting shafts. The Linear bushings and shafts blocks are primarily intended for applications where loading is somewhat light and resulting deflection between supports does not become an issue. In linear motion systems with closed linear sets the guiding shafts are mounted at their ends. Precision Linear bushings and shafts blocks have been developed for these applications.
Linear Bushings Models & Sizes
Linear Shafts Models & Sizes