挤压丝锥底孔参数

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1、J41中华人民共和国机械行业标准JB/T7428-94挤压丝锥1994--批准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挤压丝锥JB/T7428-941主题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GB/T192～193,GB/T196～197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

2、常是非磨牙丝锥。2引用标准GB/T968丝锥螺纹公差3丝锥型式和基本尺寸3.1粗柄丝锥型式尺寸按图1和表1、表2规定。图1表1粗柄粗牙丝锥尺寸mm代号公称直径螺距d1lLl1方头dPal2M22.00.402.58.041.05.52.004M2.22.20.452.89.544.56.02.245M2.52.50.452.89.544.56.02.245M33.00.503.1514.548.03.52.505M3.53.5(0.60)3.5516.550.03.52.805续表1mm机械工业部1994--批准1995-07-

3、01实施1JB/T7428-94代号公称直径螺距d1lLl1方头dPal2M44.00.704.0017.053.0─3.156M4.54.5(0.75)4.5017.053.0─3.556表2粗柄细牙丝锥尺寸mm代号公称直径螺距d1lLl1方头dPal2M2×0.252.00.252.58.041.05.52.004M2.2×0.252.20.252.89.544.56.02.245M2.5×0.352.50.352.89.544.56.02.245M3×0.353.00.353.1514.548.03.52.505M3.5×

4、0.353.50.353.5516.550.03.52.805M4×0.54.00.504.0017.053.0─3.156M4.5×0.54.50.504.5017.053.0─3.5563.2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代号公称直径螺距d1lLd2l1方头dPminal2M55.00.805.0016.0583.559.04.007M66.01.006.3019664.511.05.008M7(7.0)1.007.1019665.311.05.608M88.01.258.002

5、2.0726.013.06.309M9(9.0)1.259.0022.0727.114.07.1010M1010.01.5010.024.0807.515.08.00112JB/T7428-94表4粗柄带颈细牙丝锥尺寸mm代号公称直径螺距d1lLd2l1方头dPminal2M5×0.55.00.505.0016.0583.559.04.007M5.5×0.55.50.505.6017.0624.009.04.507M6×0.56.00.506.319.0664.511.05.008M6×0.756.00.756.319.0664

6、.511.05.008M7×0.75(7.0)0.757.1019.0665.3011.05.608M8×0.58.00.508.0019.0666.0013.06.309M8×0.758.00.758.0019.0696.0013.06.309M8×18.01.008.0019.0696.0013.06.309M9×0.75(9.0)0.759.0019.0667.1014.07.1010M9×1(9.0)1.009.0019.0697.1014.07.1010M10×0.7510.00.7510.020.0737.5015.

7、08.0011M10×110.01.0010.020.0767.5015.08.0011M10×1.2510.01.2510.020.0767.5015.08.0011注: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。2113.3细柄丝锥型式尺寸按图3和表5、表6规定。图3表5细柄粗牙丝锥尺寸mm代号公称直径螺距d1lL方头dPal2M55.00.804.0016583.156M66.01.004.5019663.556M7(7.0)1.005.6019664.

8、507M88.01.256.3022725.0083JB/T7428-94续表5mm代号公称直径螺距d1lL方头dPal2M9(9.0)1.257.1022725.608M1010.01.508.0024806.309M11(11.0)1.508.0025856