... 4.Ball screw transmission Application:Jade, copper, aluminum, iron, metal stamps, badges, signs, small pieces of steel, PVC, ... spindle, very powerful and small noise.Adopt high precision ball screw.High accuracy linear rail with automatic ... .5KWSpindle speed0-24000rpmMax engraving speed 4000mm/minTransmission formHigh precision ball screwCountertop flatness≤0.02mmEngraving accuracy(countertop)0. ...