... Stone cnc router 2. 5.5kw water-cooled spindle 3.500mm rotary axis 4.Hiwin linear square guideway 5.DSP offline Stone CNC Engraving ... Machine ZK-9015 Application1.Suitable for natural marble, granite, bluestone, sandstone, artifical stone, tombstone, milestone, ... rigidity, bearing strength better2.Dual motor driver for Y-axis, moving stably.3.Good software compatibility, ...