The aperture is a relatively simple parameter, mainly selected according to the requirements of the equipment. However, in order to maintain the stability of the saw blade, it is best to choose a larger aperture equipment for saw blades above 250MM. The aperture of standard components designed domestically is mostly 20MM for diameters of 120MM and below, 25.4MM for diameters of 120-230MM, and 30 for diameters of 250 and above. Some imported equipment also has 15.875MM holes, and the mechanical aperture of multi blade saws is relatively complex, with keyways installed to ensure stability. Regardless of the aperture size, it can be retrofitted using a lathe or a wire cutting machine. The lathe can accommodate a cushion ring within a large aperture, and the wire cutting machine can expand the hole to meet the equipment’s requirements. A series of parameters such as the type of alloy cutting head, material of the substrate, diameter, number of teeth, thickness, tooth shape, angle, aperture, etc. are combined to form the overall hard alloy saw blade. Reasonable selection and combination are necessary to better utilize its advantages