3D Printer Accessories Mini MGN12 Linear motion rail 400mm linear for CNC Axis

Linear guideways provide linear motion by re-circulating rolling elements between a profiled rail and a bearing block.

The coefficient of friction on a linear guideway is only 1/50 compared to a traditional slide and they are able to take loads in all directions

MGN12-400mm linear guide 

1 x MGN12H carriage