GB/T11854-2016表27:24工具圆锥环规基木尺寸参考尺寸mmmm圆菲规格锥度C锥角a0ZD.土IT5/2土1T11/2土0.053031.75048.458o44.45065.4644557.15082.8805069.850101.895551.3.42857188.900126.8118163539.40.460=0.291667107.950161.814065133.350202.016870165.100252.020475203.200307.024580254.000394.03005要求5.1锥角公差等级及极限偏差7:24工具圆锥量规锥角公差AT等级应符合GB/T11852一2003的规定,工作量规和校对塞规的锥角极限偏差见表3和表4。表中测量长度L按Lp=(一2(y十Z,)计算,其起止位置见图3。2y+Z1Le23Lr图3测量长度L。3