Tooth shape of sprocket

The tooth shape of the sprocket must ensure that the chain energy can enter and exit meshing smoothly and freely, minimize the impact and contact stress of the chain link during meshing, and be easy to process. The commonly used sprocket end face tooth profile is shown in Figure 1. It is composed of three sections of arcs aa, ab, cd and a section of straight line bc, referred to as three-arc-line tooth profile. The tooth shape is processed with standard cutting tools. It is not necessary to draw the end face tooth shape on the sprocket work drawing. It is only necessary to indicate "the tooth shape is manufactured according to the regulations of 3RGB1244-85" on the drawing, but the axial surface tooth shape of the sprocket should be drawn. Its dimensions refer to the relevant design manual.