钻具接头扣型尺寸

接头扣型尺寸

接头数字或尺寸 NC26(2-3/8\ NC31(2-7/8\ NC38(3-1/2\ NC46(4\ NC50(4-1/2\ 2-7/8\3-1/2\4-1/2\5-1/2\6-5/8\2-3/8\2-7/8\3-1/2\4-1/2\5-1/2\6-5/8\7-5/8\8-5/8\对应钻具及钻头 2-3/8\2-7/8\3-1/2\ 5\ 7\ 3-3/4\ 6-1/8\8-1/2\ 12-1/4\C 17-1/2\ 国内编码 2A11×2A10 211×210 311×310 4A11×4A10 411×410 221×220 321×320 421×420 521×520 621×620 2A31×2A30 231×230 331×330 431×430 531×530 631×630 731×730 831×830 公端根径(mm) 73.1 86.1 102 122.8 133.4 92.1 101.4 121.7 148 171.5 66.7 76.2 88.9 117.5 140.2 152.2 177.8 202 公端小径(mm) 60.4 71.3 85.1 103.7 114.3 70.1 77.6 96.3 126.8 150.4 47.6 54 65.1 90.5 110.1 131 144.5 167.8 公扣长度(mm) 76.2 88.9 101.6 114.3 114.3 88 95.2 101.6 127 127 76.2 88.9 95.2 108 120.6 127 133.4 136.5 母扣内径(mm) 74.6 87.7 103.6 124.6 134.9 94.5 102.8 123.8 150.5 173.8 68.3 77.8 90.5 119.1 141.7 154 180.2 204.4 母扣长度(mm) 79.4 92.1 104.8 117.5 117.5 95 98.4 104.8 130.2 130.2 79.4 92.1 98.4 111.1 123.8 130.2 136.5 139.7 1-内平IF，2-贯眼FH，3-正规REG。