Based on manufacturing technology analysis of the aluminium double\|cross axle, a method to make this component by conventional sand mold is put forward. In this paper the casting technology and properties of the component are described in details. The mechanism of satisfactory electrical performance is also analyzed. It is pointed out that it is possible to manufacture this aluminium alloy waveguide component by this method in strictly controlled casting technological condition, expecially in dimensional accuracy and surface roughness of the core.\=