... for advertisent ,brand logo ,and wooding Specification OF CNC STONE ENGRAVING MACHINE Model DL-1325Working Zone: (X Y Z) ... 24,000rpm,VFD, high speed.·Imported 2.5cm square guide rail with flange sliding block, rack and pinion, stability.·Double ... .(Used for Granite, marble, artificial stone, tombstones, milestones, ceramic tile, bluestone, sandstone and other stone carvings, and copper, aluminum, iron ...