... motor 4.Ball screw transmission Application:Jade, copper, aluminum, iron, metal stamps, badges, signs, small pieces of steel, PVC, acrylic, ... plate.Feature:Adopt the best constant spindle, very powerful and small noise.Adopt high precision ball screw.High accuracy ... whole machine is onetime casted by cast iron, bed weighing nearly 2t,working steady.XYZ axes get though precision milling and polishing, ...