... 4.linear round gui rail & ballscrew Multifunction 4 -axis CNC Engraving Machine ZK-6060 ApplicationsWood ,Metal, Stone,acrylic ,organic glass, ... bed structureCast ironBiggest engraving speed 6000mm/minPower supplyAC220V 50HZ Machine features1. Imported the ball screw and linear round ... .7. Good at small work piece precision processing, mainly used for metal, such as aluminium, copper, stainless steel, ...