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1、J8中华人民共和国机械行业标准JB/T7428一94挤压丝锥1994-09-06发布1995-07-01实施中华人民共和国机械工业部发布中华人民共和国机械行业标准JB/T7428-94挤压丝锥1主肠内容与适用范围本标准规定了普通螺纹挤压丝锥(以下简称丝锥)的型式和基本尺寸、技术要求、性能试验和标志、包装的基本要求.本标准适用于在有色金属及低强度黑色金属零件上按GB192^193、GB196^197加工公称直径2^27mm的普通螺纹的丝锥。本标准的丝锥螺纹公差带分为H1,H2,H3,H4四种，H1,H2,H3通常是磨牙丝锥，H4通常是非磨牙丝锥。2
2、引用标准GB968丝锥螺纹公差丝锥型式和墓本尺寸3.1粗柄丝锥型式尺寸按图1和表1、表2规定.;资币养肴.冬0-L叫图1表1粗柄粗牙丝锥尺寸公称直径方头代号气距d,1L1,dra11M22.00.402.58.041.05.52.004M2.22.20.452.89.544.56.02.245M2152.50.452.89.544,56.02.245M33.00.503.1514.548.03.52.505M3.53.5(0_60)3.5516.550.03.52.805M44.00.704.0017.053.03.156M4.545(0.75)
3、4.5017,053.03.556机械工业部1994-09-0‘批准1995-07-01实施1JB/T7428-94表2粗柄细牙丝锥尺寸们Inl公称直径方头代号螺距d,lL1,d尸召1:M2X0.252.00.252.58.041.05.52.004M2.2X0.252.20.252.89.544.56.02.245M2.5X0.352.50.352.89.544.56.02.245M3X0.353.00.353.1514.548.03.52.505M3.5X0.353.50.353.5516.550.03.52.805M4X0.54.00.50
4、4.0017.053.03.156M4.5X0.54.50.504.5017.053.03.5563.2粗柄带颈丝锥型式尺寸按图2和表3、表4规定。图2表3粗柄带颈丝锥粗牙尺寸mm公称直径方头代号螺_距d,1Ld,m,.1,dYa1.M55.00.805.0016.0583.559.04.007M66.01.006.3019664.511.05.008M7(7.0)1.007.1019665.311.05.608M88.01.258.0022.072、6.013.06.309M9(9.0)1.259.0022.0727.114.07.1010M1
5、010.01.5010.0024.0807.515.08.0011表4粗柄带颈细牙丝锥尺寸mm公称直径方头代号螺_距d,LLd-1,d1'a1:M5X0.55.00.505.0016.0583.559.04.007M5.5X0.55.5’0.505.6017.0624.009.04.507M6X0.56.00.506.319.0664.511.05.008M6X0.756.00.756.319.0664.511.05.008!M7X0.75(7.0)0.757.1019.0665.3011.050.6M8X0.58.00.508.0019.066
6、6.0013.06.309JB/T7428一94续表4mm公称直径方头代号螺_距d,1Ld-1,d尸召1,M8X0.758.00.758.0019.0696.0013.06.30gM8X18.01.008.0019.06g6.0013.06.309M9X0.75(9.0)0.759.0019.0667.1014.07.1010M9x1(9.0)1.009.0019.0697.1014.07.1010M10X0.7510.00.7510.020.0737.5015.08.0011M10X110.01.0010.020.0767.5015.08.00
7、11lM10X1.2510.01.2510.020.0767.5015.08.0011往:①括号内的尺寸应尽可能不采用。②表3和表4中的d.,,l，为空刀槽尺寸.允许无空刀槽，无空刀槽时螺纹长度应为l+l,/2.3.3细柄丝锥型式尺寸按图3和表5、表6规定。飞t}O0图3表5细柄粗牙丝锥尺寸n飞力1公称直径方头代号螺_距d,1Ldrat,M55.00.804.0016583.156M66.01.004.5019663.556M7(7.0)1.005.6019664.507M88.01.256.3022725.008M9(9.0)1.257.102
8、2725.608M1010.01.508.0024806.309Mil(11.0)1.508.0025856.309M1212.01.7
