... for advertisent ,brand logo ,and wooding Specification OF CNC STONE ENGRAVING MACHINE Model DL-1325Working Zone: (X Y Z) ... motorstepper motorSpindle3000W liquid-cooled with 24,000rpm,VFDMax. Working speed30,000mm/minCollets Type3.175mm/ 4mm/ 6mmCommand CodeG ... for Granite, marble, artificial stone, tombstones, milestones, ceramic tile, bluestone, sandstone and other stone carvings, and copper, aluminum, ...