Linear bearings are a type of bearing that "bear" or support the load of the carriage during its single-axis linear movement and provide a low friction sliding surface for the guide rails. In a linear guide, the carriage is the component that travels in a straight line, curved line, back and forth, along the length of the guide rail, which is fitted and inserted into the linear bearing.
The various types of linear bearings are a rolling element or fluid device that reduces friction. They offer excellent precision, better mounting, and much smoother even motion. Linear bearings are used in 3D printers, sliding doors, and several automated applications where guiding rail motion is required.
A linear bearing is a critical component of a linear guide assembly. Its applications are found on cutting machinery, XY positioning tables, machine slides, industrial robots, and instrumentation systems. Either a motor driven ball screw, lead screw, pneumatic cylinders, hydraulic cylinders, or manual force can be used to drive the motion with single axis motion limited in the X-Y plane. Hydraulic and pneumatic cylinders are widely used as the basis of the XY bed of computer numeric controlled (CNC) milling machines.
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