The rolling guide can be divided into two types: preloading and no preloading, depending on whether it is preloaded.
The advantage of preloading is that the rigidity of the guide rail is improved. It is suitable for the guide rails with large torque and vertical direction. The guide shaft of CNC machine tools usually adopts such guide rails.
Rolling guides without preloading are often used in conveyors such as robots and magazines for CNC machine tools.
CNC machine tools also generally use a rolling guide support block, which has been made into standard components, which are characterized by high rigidity, large carrying capacity, easy disassembly and assembly, and can be directly mounted on moving parts of any stroke length.