UM3 - Y-Linear Shaft

The UltiMaker Y-Linear Shaft is a 6mm (or 8mm depending on specific revision, often 8mm in UM3 kits) precision-ground, hardened steel replacement rod designed for the Y-axis on UltiMaker 2, 2+, and 3 printers. It ensures smooth, low-friction motion for the print head carriage, featuring high wear resistance for long-term 3D printing accuracy