... Four-row Slider, Undertake Heav-duty, Stable operation, High precision, Long lifetime.The whole machine is made of welding steel, ... high stiffness, the back table is Steel heet, heavy-duty.Constant Output Spindle, Heavy cutting ... stone like Granite can be engraved layered, reach 150mm3. Marble, Bluestone and so on can be engraved to 5mm each time stone cnc router ...