... like woodworking,advertising,glass,marble,granite,stone,metal,etc multi function cnc router machine RJ1224Feature:1 Profiled steel welded ... double motor ensures stable performance of machine.3 High precision rack gear transmission ensures high accuracy , fast speed and ... Square RailLinear Square RailLinear Square RailTransmissionPrecise Rack Gear of XY axis, Z Ball ScrewPrecise Rack Gear of XY axis, Z ...