In a CNC system there are 2 major components ... The Z axis had to be disassembled to access the lead nut and linear rails. This reveled the source of [Peter’s] problem; no lubricant, not ...

Here’s an interesting experiment that attempts to measure the quality of a linear rail by using a form of ... profile something like these cardboard CNC modules.

Minimal construction for your 3D printer and CNC machine tool. High flexibility: MGN9H linear guide rail can provide multi-functional and easy-to-use operation on any 3D printer and CNC machine.