15QE1530 - x 3 Smooth Heavy T-Slotted Aluminum Extrusion

My question is - why use expensive extruded aluminum T-slot? I mean, for a CNC router it makes sense because you need sub-millimeter

What type of t-slot profile you use depends on how your structure will be loaded so it's

aluminum extrusions t slot How T-Slot Products are Made Using Parker-Hannifin Aluminum Extrusions

aluminum slot wheels Features: 1: Silver surface, beautiful and durable 3: 2020 T slot aluminum profile support linear motion, you can build such as 3d printer and so on 4: