套筒滚子链链轮国家标准GB1244-76已在国内试行,链轮端面齿形如图1所示。它与图2所示石油部部标SYB10002-63规定的链轮齿形的主要差别在于后者具有节线间距e(亦可称之为齿沟圆弧中心偏移量)。由于以往钻机上采用的链轮齿形均是按图2齿形制造的,因此 Sleeve roller chain sprocket national standard GB1244-76 has been piloted in China, sprocket tooth profile shown in Figure 1. Its main difference from the sprocket profile specified in SYB10002-63, the oil ministry standard shown in Figure 2, is that the latter has a pitch n of the pitch (also referred to as the center offset of the gullet arc). As in the past rig on the use of sprocket tooth profile are shown in Figure 2 tooth shape manufacturing, therefore