With center distance between machining and workpiece reduced, formed milling cutter in cutting edge after persistent cutting and grinding can lead to blunt, thereby spiral gear-shape error of cutter produces surface. When the precision of helicoids section shape of workpiece is lower, it can use ordinary, batch of milling cutter to cutting workpiece through the installation debugging in parameters, such as the center distance and axial intersection angle, etc, in order to reduce workpiece gear-shape error. This paper introduces a method of calculating parameters of the section workpiece helicoids of tooth head profile according to the shaft section milling cutter tooth shape. Through this method can rapidly determine the selected milling machining precision of tooth profile is whether or not within the allowed in the workpiece gearshape error range.© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.