... constant power spindle square guide,stepper motor SD-9012 granite router bitsApplication materialsThis series of models mainly used for ... cutting and engraving of the tile,bluestone, marble,granite,white marble,sandstone,glass type,copper,iron,plastic, stone ... accuracy 0.025mmWorking voltage AC380V/50HZ, 3-phaseCommand code G codeComputer interface USB 2.0Collet 3.175mm, 4mm, 6mmSoftware ...