Linear guides provide precision low friction guidance of payloads for industrial machine and instrument applications. One or multiple bearing blocks can be mounted on a linear guide rail. Each bearing block has four rows of recirculating balls that engage the precision ground rail allowing almost frictionless movement. These products are available in enterprise general sizes as small as size 15 up to size 65. Rail lengths up to 4000 mm ( 13.1 ft) long.
This square carriage is HGH25CA , it is linear slide bearings 23x48x40mm. It fits for HGR and HGT profile rails. HGH25CA linear guide rail block is extensively used on CNC machines such as CNC routers, CNC milling machines, CNC laser, CNC plasma machines, and different industrial linear motion systems.
HG series HGH 25 CA Linear guideways are designed with load capacity and rigidity greater than other similar products with circular-arc groove and structure optimization. It features equal load rankings in the radial, reverse radial and lateral directions, and self-aligning to absorb installation error. Thus, HG series linear guideways can achieve a long life with high speed, high accuracy, and smooth linear motion.

​The feature of linear guide movement is to aid and guide moving components to make reciprocating linear motion in a given direction. According to the nature of friction, linear motion guides can be divided into sliding friction guides, rolling friction guides, elastic friction guides, fluid friction guides and other types. Linear bearings are often used in automatic machinery, such as machine tools imported from Germany, bending machines, laser welding machines, etc. Of course, linear bearings and linear shafts are used in pairs. Linear guides are in general used in mechanical structures with relatively high precision requirements. There is no intermediate medium between the shifting aspect and the constant component of the linear guide, but rolling metal balls.

A linear guideway approves a kind of linear motion that makes use of rolling factors such as balls or rollers. By the use of recirculating rolling factors between the rail and the block, a linear guideway can achieve high precision linear motion, with these features, linear guideways can greatly enhance moving accuracy, especially, when accompanied with particular ball screws. When the utilization of the linear guide, please keep away from dust and foreign objects as a good deal as possible. Generally, please set the running temperature restrict beneath eighty tiers Celsius. If the temperature exceeds this temperature, the plastic quit cap of the linear slider will be damaged.