粗牙螺纹底孔
A1.粗牙系列(见表1)
表1 单位为毫米
攻丝底孔对照表
M Metrisches ISO Regelgewinde / Metric ISO thread / Filetage métrique ISO standard / Filettatura metrica ISO / Rosca Métrica ISO Kurzzeichen Thread size Désignation Diametro del ?letto Dimensión rosca (DIN 13) Bohrer-; Nominal size diamètre du foret Diametro nominale ;-Taladro (mm) (acc. to DIN 336) Innengewindekern-; Minor diameter / Diamètre du noyau ?leté / Diametro del nocciolo ;-nucleo de rosca interior (mm) min 6H m a x M 10,750,7290,785* M 1,20,950,9290,985* M 1,41,11,0751,142* M 1,61,251,2211,321 M 1,71,351,3211,421 M 1,81,451,4211,521 M 21,61,5671,679 M 2,21,751,7131,838 M 2,31,851,8131,938 M 2,52,052,0132,138 M 2,62,152,1132,238 M 32,52,4592,599 M 3,52,92,8503,010 M 43,33,2423,422 M 4,53,73,6883,878 M 54,24,1344,334 M 654,9175,153 M 765,9176,153 M 86,86,6476,912 M 97,87,6477,912 M 108,58,3768,676 M 119,59,3769,676 M 1210,210,10610,441 M 141211,83512,210 M 161413,83514,210 M 1815,515,29415,744 M 2017,517,29417,744 M 2219,519,29419,744 M 242120,75221,252 M 272423,75224,252 M 3026,526,21126,771 M 3329,529,21129,771 M 363231,67032,270 M 393534,67035,270 M 4237,537,12937,799 M 4540,540,12940,799 M 484342,58743,297 M 524746,58747,297 M 5650,550,04650,796MF Metrisches ISO Feingewinde / Metric ISO Fine thread / Filetage métrique ?n ISO / Filettatura metrica ISO ?ne / Rosca Métrica ISO Fina Kurzzeichen Thread size Désignation Diametro del ?letto Dimensión rosca (DIN 13) Bohrer-; Nominal size diamètre du foret Diametro nominale ;-Taladro (mm) (acc. to DIN 336) Innengewindekern-; Minor diameter / Diamètre du noyau ?leté / Diametro del nocciolo ;-nucleo de rosca interior (mm) min 6H m a x M 2 x 0,251,751,7291,785 M 2,2 x 0,251,951,9291,985 M 2,3 x 0,252,052,0292,085 M 2,5 x 0,352,152,1212,221 M 3 x 0,252,752,7292,785 M 3 x 0,352,652,6212,721 M 3,5 x 0,353,153,1213,221 M 4 x 0,353,653,6213,721 M 4 x 0,53,53,4593,599 M 4,5 x 0,543,9594,099 M 5 x 0,354,654,6214,721 M 5 x 0,54,54,4594,599 M 5 x 0,754,24,1884,378 M 6 x 0,55,55,4595,599 M 6 x 0,755,255,1885,378 M 7 x 0,56,56,4596,599 M 7 x 0,756,256,1886,378 M 8 x 0,57,57,4597,599 M 8 x 0,757,257,1887,378 M 8 x 176,9177,153 M 9 x 0,758,258,1888,378 M 9 x 187,9178,153 M 10 x 0,59,59,4599,599 M 10 x 0,759,259,1889,378 M 10 x 198,9179,153 M 10 x 1,258,758,6478,912 M 11 x 1109,91710,153 M 12 x 0,511,511,45911,599 M 12 x 11110,91711,153 M 12 x 1,2510,7510,64710,912 M 12 x 1,510,510,37610,676 M 13 x 11211,91712,153 M 14 x 0,7513,213,18813,378 M 14 x 11312,91713,153 M 14 x 1,2512,7512,64712,912 M 14 x 1,512,512,37612,676 M 15 x 11413,91714,153 M 15 x 1,513,513,37613,676 M 16 x 0,7515,215,18815,378 M 16 x 11514,91715,153 M 16 x 1,2514,814,64714,912 M 16 x 1.514,514,37614,676 M 17 x 11615,91716,153 M 18 x 11716,91717,153 M 18 x 1.516,516,37616,676 M 18 x 21615,83516,210 M 20 x 11918,91719,153 M 20 x 1.518,518,37618,676 M 20 x 21817,83518,210 M 22 x 12120,91721,153 M 22 x 1,520,520,37620,676 * 5H max Gewindekernl?cher für Gewindebohrer Tapping drill sizes for taps / Avant-trous de taraudage Prefori per maschi / Dimensiones de la broca previa para machos MARYLAND METRICS Technical Data Chart: A collection of Tapping drill sizes for taps in a multilingual format https://www.360docs.net/doc/0f1420296.html,
攻牙底孔参数
攻牙底孔的使用参数表 一、螺紋下孔徑表 1、公制粗牙螺紋JIS B 0209-1982(單位：mm) 螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑 最小直径最大直径 M1×0.25 0.75 0.78 (80%) 0.729 0.785 1.1 ×0.25 0.85 0.88 (80%) 0.829 0.885 1.2 ×0.25 0.95 0.98 (80%) 0.929 0.985 1.4 ×0.3 1.1 1.14 (80%) 1.075 1.142 1.6 ×0.35 1.25 1.32 (75%) 1.221 1.321 1.8 ×0.35 1.45 1.52 (75%) 1.421 1.521 2×0.4 1.6 1.65 (80%) 1.567 1.679 2.2 ×0.45 1.75 1.83 (75%) 1.713 1.838 2.5 ×0.45 2.1 2.13 (75%) 2.013 2.138 3×0.5 2.5 2.59 (75%) 2.459 2.599 3.5 ×0.6 2.9 3.01 (75%) 2.850 3.010 4×0.7 3.3 3.39 (80%) 3.242 3.422 4.5 ×0.75 3.8 3.85 (80%) 3.688 3.878 5×0.8 4.2 4.31 (80%) 4.134 4.334 6×1 5 5.13 (80%) 4.917 5.153 7×1 6 6.13 (80%) 5.917 6.153 8×1.25 6.8 6.85 (85%) 6.647 6.912 9×1.25 7.8 7.85 (85%) 7.647 7.912 10×1.5 8.5 8.62 (85%) 8.376 8.676 11×1.5 9.5 9.62 (85%) 9.376 9.676 12×1.75 10.3 10.40 (85%) 10.106 10.441 14×2 12 12.2 (85%) 11.835 12.210 16×2 14 14.2 (85%) 13.835 14.210 18×2.5 15.5 15.7 (85%) 15.294 15.744 20×2.5 17.5 17.7 (85%) 17.294 17.744 22×2.5 19.5 19.2 (85%) 19.294 19.744 24×3 21 21.2 (85%) 20.752 21.252 27×3 24 24.2 (85%) 23.752 24.252 30×3.5 26.5 26.6 (90%) 26.211 26.771 33×3.5 29.5 29.6 (90%) 29.211 29.771 36×4 32 32.1 (90%) 31.670 32.270 39 ×4 35 35.1 (90%) 34.670 35.270 42 ×4.5 37.5 37.6 (90%) 37.129 37.799 45 ×4.5 40.5 40.6 (90%) 40.129 40.799 48 ×5 43 43.1 (90%) 42.587 43.297 註(1)M1.4以下等級：5H、M1.6以上等級：6H (2)基於JIS B 0209-1982標準
英制螺纹标准对照表
英制螺纹标准对照表 英制螺纹标准JIS B 0203,JIS B 2301 (mm) #0 1.52 #1 1.85 #2 2.18 #3 2.51 #4 2.84 #5 3.18 #6 3.51 #7 3.84 #8 4.17 #10 4.83 #12 5.48 1/4 6.35 UNS 是英制普通粗牙螺纹; UNF 是英制航空
标示皆将分母为8, 再直接称分子之番号. Ex: 1/8 x 0.50 –PPB: 1 分牙螺丝x 0.50”长, PPB Ex: 5/16 x 0.50 –PPB = 2.5/8 x 0.50-PPB : 2 分半牙螺丝x 0.50”长, PPB Ex: 5/32 x 0.50 –PPB =1.25/8 x 0.50-PPB: 1 分2 厘半螺丝x 0.50”长, PPB Ex: 1/4 x 0.50-PPB= 2/8 x 0.50-PPB: 2 分牙螺丝x 0.50”长, PPB 注: 有时会标示粗牙或细牙. UNF: 细牙 :电子业较常用. UNC:粗牙: 重机械结构较常用. Ex: 3/8 x 0.50 ,UNF –PPB: 3 分细牙螺丝x 0.50”长, PPB. C-2: Length Code: 为英寸标示, 须乘以25.40 换算为mm. 用扣规量，与公制牙型吻合是公制螺纹，与英制螺纹吻合是英制螺纹。 也可以用卡尺量螺纹的外径，和螺距。 公制螺纹外径是以毫米为单位，如6，8，10，12，18，20毫米等等螺距也是以毫米为单位，如 0.5,0.75,1,1.5,2,3,等等 英制螺纹外径是以英寸为单位，（每英寸即是25.4 毫米）如3/16,5/8,1/4,1/2,等等所以用公制卡尺量外径读数常带不规则的小数。 英制螺距是用每英寸含多少个牙表示。把卡尺定在25.4毫米，把一个尺尖对齐螺纹牙尖，另一个尺尖如对齐螺纹牙尖就是英制螺纹，如对不齐螺纹牙尖应该是公制螺纹。 丈量螺距时最好把螺纹的牙尖倒印在白粉笔上，粉笔上的印比较清楚，便于丈量。测公制螺距应该丈量一 段长度，如10，15，20，毫米等等，数一下含多少牙，算出螺距 用英寸为单位规定螺纹规格的为英制螺纹，如：G1"。用公制单位毫米规定螺纹规格的为公制螺纹。如：
标准螺纹螺距对照表
标准螺纹螺距对照表 螺纹粗牙细牙 M1 0.25 0.2 M1.1 0.25 0.2 M1.6 0.35 0.2 M2 0.4 0.25 M2.5 0.45 0.35 M3 0.5 0.35 M4 0.7 0.5 M5 0.8 0.5 M6 1 0.75, (0.5) M8 1.25 1, 0.75, (0.5) M10 1.5 1.25, 1, 0.75, (0.5) M12 1.75 1.5, 1.25, 1, (0.75), (0.5) (M14) 2 1.5, 1.25, 1, (0.75), (0.5) M16 2 1.5, 1.25, 1, (0.75), (0.5) (M18) 2.5 2, 1.5, 1.25, 1, (0.75), (0.5) M20 2.5 2, 1.5, 1.25, 1, (0.75), (0.5) (M22) 2.5 2, 1.5, 1.25, 1, (0.75), (0.5) M24 3 2, 1.5, 1, (0.75) (M27) 3 2, 1.5, 1, (0.75) M30 3.5 3, 2, 1.5, 1, (0.75) (M33) 3.5 (3), 2, 1.5, 1, (0.75) M36 4 3, 2, 1.5, (1) (M39) 4 3, 2, 1.5, (1)
M42 4.5 (4), 3, 2, 1.5, (1) (M45) 4.5 (4), 3, 2, 1.5, (1) M48 5 (4), 3, 2, 1.5, (1) (M52) 5 (4), 3, 2, 1.5, (1) M56 5.5 4, 3, 2, 1.5, (1) (M60) 5.5 4, 3, 2, 1.5, (1) M64 6 4, 3, 2, 1.5, (1) (M68) 6 4, 3, 2, 1.5, (1) M72 6 4, 3, 2, 1.5, (1) (M76) 6 4, 3, 2, 1.5, (1) M80 6 4, 3, 2, 1.5, (1)
各种螺纹尺寸与结构大全 (2)
螺纹 第一章国标螺纹的一般知识 一.螺纹的分类 1.螺纹分内螺纹和外螺纹两种； 2.按牙形分可分为：１）三角形螺纹２）梯形螺纹３）矩形螺纹４）锯齿形螺纹； 3.按线数分单头螺纹和多头螺纹； 4.按旋入方向分左旋螺纹和右旋螺纹两种, 右旋不标注，左旋加LH，如M24× 1.5LH； 5.按用途不同分有：米制普通螺纹、用螺纹密封的管螺纹、非螺纹密封的管螺纹、60°圆锥管螺纹、米制锥螺纹等 二.米制普通螺纹 1.米制普通螺纹用大写M表示，牙型角2α=60°（α表示牙型半角）； 2.米制普通螺纹按螺距分粗牙普通螺纹和细牙普通螺纹两种； 2.1.粗牙普通螺纹标记一般不标明螺距，如M20表示粗牙螺纹；细牙螺纹标记必须标明螺距，如M30×1.5表示细牙螺纹、其中螺距为1.5。 2.2.普通螺纹用于机械零件之间的连接和紧固，一般螺纹连接多用粗牙螺纹，细牙螺纹比同一公称直径的粗牙螺纹强度略高，自锁性能较好。 3.米制普通螺纹的标记：M20-6H、M20×1.5LH-6g-40,其中M 表示米制普通螺纹，20表示螺纹的公称直径为20mm，1.5表示螺距，LH表示左旋，6H、6g表示螺纹精度等级，大写精度等级代号表示内螺纹，小写精度等级代号表示外螺纹，40表示旋合长度； 3.1.常用米制普通粗牙螺纹的螺距如下表(螺纹底孔直径：碳钢φ＝公称直径－P；铸铁φ＝公称直径－1.05~1.1P；加工外螺纹光杆直径取φ＝公称直径－0.13P)： 表1 常用米制普通粗牙螺纹的直径/螺距
3.2.米制普通内螺纹的加工底孔直径可用下式作近似计算：d=D-1.0825P,其中Ｄ为公称直径，Ｐ为螺距。 三.用螺纹密封的管螺纹（GB 7306与ISO7/1相同） 1.用螺纹密封的管螺纹不加填料或密封质就能防止渗漏。用螺纹密封的管螺纹有圆柱内螺纹和圆锥外螺纹、圆锥内螺纹和圆锥外螺纹两种连接形式。压力在5×105Pa以下时，用前一种连接已足够紧密，后一种连接通常只在高温及高压下采用。 2.用螺纹密封的管螺纹内螺纹有圆锥、圆柱两种形式。外螺纹只有圆锥一种形式。牙型如下：锥度1：16，牙形角55°，旧螺纹标准示例：ZG3/8； 3.标记示例： 圆锥内螺纹Rc 3/8 圆柱内螺纹Rp3/8 圆锥外螺纹R3/8 当螺纹为左旋螺纹时Rc 3/8-LH（LH表示左旋螺纹） 常用螺纹(标记：Rc 3/8、Rp3/8、R3/8)的基本尺寸： 表2 4.GB 7306规定的标记方法与ISO7/1的规定是一样的。在ISO 7/1作出统一之前，各国的标记方法如下： 表3
普通螺纹攻丝前底孔尺寸(in)
普通螺纹攻丝前底孔尺寸 螺纹的直径和螺距钻孔直径车孔直径螺纹的直 径和螺距 钻孔直径车孔直径 铸铁 青铜 钢 黄铜 直径公差铸铁 青铜 钢 黄铜 直径公差 M4*0.7 M4*0.5 3.3 3.5 3.3 3.5 M27**3 M27*2 23.7 24.7 23.9 24.9 23.5 +0.3 M5*0.8 M5*0.5 4.1 4.4 4.2 4.5 M27*1.5 M27*1 25.3 25.8 25.5 26 M6*1 M6*0.75 4.9 5.1 5 5.2 4.9 - +0.3 M30*3.5 M30*3 26 26.7 26.2 26.9 26 +0.3 M8*1.25 M8*1 6.6 6.9 6.7 7 6.6 - +0.2 M30*2 M30*1.5 27.7 28.3 27.9 28.5 M10*1.5 M10*1.25 M10*1 8.4 8.6 8.9 8.5 8.7 9 8.3 - - +0.25 M33*3.5 M33*3 M33*2 29 29.7 30.7 29.2 29.9 30.9 29 +0.3 M12*1.75 M12*1.5 M12*1.25 M12*1 10.1 10.4 10.6 10.9 10.2 10.5 10.7 11 10 +0.25 M33*1.5 M36*4 M36*3 M36*1.5 31.3 31.5 32.7 34.3 31.5 31.7 32.9 34.5 - 31.4 32.5 34.3 - +0.3 +0.17 +0.17 M14*2 M14*1.5 M14*1 11.8 12.4 12.9 11.9 12.5 13 11.7 +0.3 M39*4 M39*3 M39*1.5 34.6 35.7 37.3 34.8 35.9 37.5 34.4 35.5 37.3 +0.3 +0.17 +0.17 M16*2 M16*1.5 M16*1 13.8 14.4 14.9 13.9 14.5 15 13.7 +0.3 M42*4.5 M42*3 M42*1.5 37.1 38.7 40.3 37.3 38.9 40.5 36.8 38.5 40.3 +0.3 +0.17 +0.17 M18*2.5 M18*2 M18*1.5 M18*1 15.3 15.8 16.4 16.9 15.4 15.9 16.5 17 15.1 +0.3 M45*4.5 M45*3 M45*1.5 40 41.8 43.3 40.2 42 43.5 39.8 41.5 43.3 +0.3 +0.17 +0.17 M20*2.5 M20*2 M20*1.5 M20*1 17.2 17.7 18.3 18.8 17.4 17.9 18.5 19 17.1 +0.3 M48*5 M48*3 M48*1.5 42.5 44.8 46.3 42.7 45 46.5 42.2 44.5 46.3 +0.3 +0.17 +0.17 M22*2.5 M22*2 M22*1.5 M22*1 19.2 19.7 20.3 20.8 19.4 19.9 20.5 21 19.1 +0.3 M52*5 M52*3 M52*1.5 46.4 48.8 50.3 46.6 49 50.5 46.2 48.5 50.2 +0.3 +0.17 +0.17 M24*3 M24*2 M24*1 20.7 21.7 22.8 20.9 21.9 23 20.5 +0.3 M56*5.5 M56*4 M56*2 - - - - - - 49.7 51.4 53.7 +0.3 +0.2 +0.2
最全的螺纹孔径对照表
最大最小最大最小G4-G6G7-G8G9M1.0*0.250.750.7850.729M12*1.011.0011.15310.917M1.0*0.250.860.88M1.1*0.250.850.8850.829M12*0.511.5011.52011.400M1.1*0.250.960.98最大M1.2*0.250.950.9850.929M14*1.512.5012.67612.376M1.2*0.25 1.06 1.08G 1/167.72 6.84M1.4*0.3 1.10 1.142 1.075M14*1.013.0013.15312.917M1.4*0.3 1.24 1.25G(PF)1/89.738.85M1.6*0.35 1.25 1.321 1.221M15*1.513.5013.67613.376M1.6*0.35 1.41 1.431/413.1611.89M1.7*0.35 1.35 1.421 1.321M15*1.014.0014.15313.917M1.7*0.35 1.51 1.533/816.6615.40M1.8*0.35 1.45 1.521 1.421M16*1.514.5014.67614.376M1.8*0.35 1.61 1.631/220.9619.17M2.0*0.4 1.60 1.679 1.567M16*1.015.0015.15314.917M2*0.4 1.78 1.805/822.9121.13M2.2*0.45 1.75 1.838 1.713M17*1.515.5015.67615.376M2.2*0.45 1.95 1.983/426.4424.66M2.3*0.4 1.90 1.979 1.867M17*1.016.0016.15315.917M2.3*0.4 2.08 2.107/830.2028.42M2.5*0.45 2.10 2.138 2.013M18*2.016.0016.21015.835M2.5*0.45 2.25 2.28133.2530.93M2.6*0.45 2.20 2.238 2.113M18*1.516.5016.67616.376M2.6*0.45 2.35 2.38 1.12537.9035.58M3.0*0.5 2.50 2.599 2.459M18*1.017.0017.15316.917M3.0*0.5 2.73 2.75 1.2541.9139.59M3.0*0.6 2.40 2.440 2.280M20*2.018.0018.21017.835M3.5*0.6 3.17 3.20 1.37544.3242.01M3.5*0.6 2.90 3.010 2.850M20*1.518.5018.67618.376M4.0*0.7 3.62 3.65 3.69 1.547.8049.02M4.0*0.7 3.30 3.422 3.242M20*1.019.0019.15318.917M5.0*0.8 4.56 4.60 4.64 1.62551.9150.79M4.0*0.75 3.25 3.326 3.106M22*2.020.0020.21019.835M6.0*1.0 5.45 5.50 5.55 1.7553.7556.66 M4.5*0.75 3.80 3.878 3.688M22*1.520.5020.67620.376M7.0*1.0 6.45 6.50 6.552 59.61 M5.0*0.8 4.20 4.334 4.134M22*1.021.0021.15320.917M8.0*1.257.317.387.44M5.0*0.9 4.10 4.170 3.930M24*2.022.0022.21021.835M10*1.59.189.259.32M6.0*1.0 5.00 5.153 4.917M24*1.522.5022.67622.376M10*1.259.319.389.44M7.0*1.0 6.00 6.153 5.917M24*1.023.0023.15322.917M12*1.7511.0411.1211.21M8.0*1.25 6.80 6.912 6.647M25*2.023.0023.21022.835M12*1.25 11.3111.3811.44 M9.0*1.257.807.9127.647M25*1.523.5023.67623.376最大M10*1.58.508.6768.376M25*1.024.0024.15323.917PS 1/16 - 28 6.50 6.632M11*1.59.509.6769.376M26*1.524.5024.67624.376PS 1/8 - 288.508.637M12*1.7510.3010.44110.106M27*2.025.0025.21024.835PS 1/4 - 1911.4011.549M14*2.012.0012.21011.835M27*1.525.5025.67625.376PS 3/8 - 1915.0015.054M16*2.014.0014.21013.835M27*1.026.0026.15325.917PS 1/2 - 1418.5018.773M18*2.515.5015.74415.294M28*2.026.0026.21025.835PS 3/4 - 1424.0024.259M20*2.517.5017.74417.294M28*1.526.5026.67626.376PS 1 - 1130.2030.471M22*2.519.5019.74419.294M28*1.027.0027.15326.917规格PS 1-1/4 - 1138.8039.132M24*3.021.0021.25220.752M30*3.027.0027.25226.752(UNC) 最大最小PS 1-1/2 - 1144.8045.025M27*3.024.0024.25223.752M30*2.028.0028.21027.835 (螺丝牙外径) PS 2 - 11 56.50 56.836 M30*3.5 26.50 26.771 26.211 M30*1.528.5028.67628.376No.1-64(1.854) 1.55 1.582 1.425M30*1.029.0029.15328.917No.2-56(2.184) 1.80 1.871 1.695M32*2.030.0030.21029.835No.3-48(2.515) 2.10 2.146 1.941M32*1.530.5030.67630.376No.4-40(2.845) 2.30 2.385 2.157M33*3.030.0030.25229.752No.5-40(3.175) 2.60 2.697 2.487M33*2.031.0031.21030.835No.6-32(3.505) 2.80 2.895 2.642最大最小M33*1.531.5031.67631.376No.8-32(4.166) 3.40 3.530 3.302M1.0*0.20.800.8210.783M35*1.533.5033.67633.376No.10-24(4.826) 3.90 3.962 3.683M1.1*0.20.900.9210.883M36*3.033.0033.25232.752No.12-24(5.486) 4.50 4.597 4.344PT 1/16 -28 6.10 6.20 6.244 6.384M1.2*0.2 1.00 1.0210.983M36*2.034.0034.21033.8351/4 - 20 5.10 5.257 4.979PT 1/8 -288.108.208.4298.388M1.4*0.2 1.20 1.221 1.183M36*1.5 34.50 34.67634.376 5/16 - 18 6.60 6.731 6.401PT 1/4 -1910.7011.0010.96211.174M1.6*0.2 1.40 1.421 1.3833/8 - 168.008.1537.798PT 3/8 -1914.2014.5014.44814.658M1.7*0.2 1.45 1.500 1.4607/16 - 149.409.5509.144PT 1/2 -1417.6018.0017.97918.263M1.8*0.2 1.60 1.621 1.5831/2 - 1310.8011.02310.592PT 3/4 -1423.0023.5023.37823.663M2.0*0.25 1.75 1.785 1.7299/16 - 1212.2012.44611.989PT 1 -1129.0029.5029.45929.822M2.2*0.25 1.95 1.985 1.929规格5/8 - 1113.6012.86813.386PT 1-1/4 -1137.5038.0037.97638.339M2.3*0.25 2.05 2.061 2.001(UNF) 最大最小3/4 - 1016.5018.84016.307PT 1-1/2 -1143.4044.0043.86944.232M2.5*0.35 2.20 2.221 2.1217/8 - 919.5019.76119.177PT 2 -11 54.9055.5055.41255.844 M2.6*0.35 2.20 2.246 2.186No.0-80(1.524) 1.25 1.305 1.182 1 - 822.2022.60621.971M3.0*0.35 2.70 2.721 2.621No.1-72(1.854) 1.55 1.612 1.4741-1/8 - 725.0025.34924.638M3.5*0.35 3.20 3.221 3.121No.2-64(2.184) 1.85 1.912 1.7561-1/4 - 728.2028.52427.813M4.0*0.5 3.50 3.599 3.459No.3-56(2.515) 2.10 2.197 2.0251-3/8 - 630.8031.11530.353M4.5*0.5 4.00 4.099 3.959No.4-48(2.845) 2.40 2.458 2.2711-1/2 - 634.0034.29033.528M5.0*0.5 4.50 4.599 4.459No.5-44(3.175) 2.70 2.740 2.5511-3/4 - 5 39.5039.82738.964M5.5*0.5 5.00 5.099 4.959No.6-40(3.505) 2.90 3.022 2.820 2 - 4-1/245.20 45.593 44.679 使用绞刀时不用绞刀时 M6.0*0.75 5.30 5.378 5.188No.8-36(4.166) 3.50 3.606 3.4041/16 - 27 6.10 6.25M6.0*0.5 5.50 5.550 5.400No.10-32(4.826) 4.10 4.165 3.9631/8 -278.338.43M7.0*0.75 6.30 6.378 6.188No.12-28(5.846) 4.60 4.724 4.4961/4 -1810.7211.13M7.0*0.5 6.50 6.550 6.4001/4 - 28 5.50 5.588 5.3603/8 -1814.2714.27M8.0*1.07.007.153 6.9175/16 - 24 6.907.035 6.782规格1/2 -1417.4817.86M8.0*0.757.307.3787.1883/8 - 248.508.6368.382(UNEF)最大最小3/4 -1422.6323.01M8.0*0.57.507.5207.4007/16 - 209.9010.0339.729No.12 - 32 4.70 4.826 4.623 1 -11-1/228.5828.98M9.0*1.08.008.1537.9171/2 - 2011.5011.60711.3291/4 - 32 5.60 5.690 5.4861-1/4 -11-1/237.3137.69M9.0*0.758.308.3788.1889/16 - 1812.9013.08112.7515/16 - 327.107.2647.0871-1/2 -11-1/243.6644.04M10*1.258.808.9128.4675/8 - 1814.5014.68114.3513/8 - 328.708.8658.661 2 -11-1/2 55.5855.96 M10*1.09.009.1538.9173/4 - 1617.5017.67817.3237/16 - 2810.2010.33810.135M10*0.759.309.3789.1887/8 - 1420.5020.67520.2701/2 - 2811.8011.93811.709M10*0.59.509.5209.400 1 - 1223.2023.57123.1149/16 - 2413.2013.38613.132M11*1.010.0010.1539.9171-1/8 - 1226.5026.74626.2895/8 - 2414.8014.98614.732M11*0.7510.3010.37810.1881-1/4 - 1229.5029.92129.4643/4 - 2017.8017.95817.678M12*1.510.5010.67610.3761-3/8 - 1232.8033.09632.6397/8 - 2021.0021.13320.853M12*1.25 10.80 10.91210.647 1-1/2 - 1236.0 36.271 35.814 1 - 20 24.00 24.30824.028 规 格使用绞刀时不用绞刀时 有效牙部之长度(最小)中之母螺牙内径 标准长度(最小)中之母螺牙内径 螺 纹 攻 牙 钻 孔 径 和 滚 造 径 对 照 表 英制平行管用螺紋PF(G) (單位：mm) 大 径钻孔径 规格公 制 细 螺 纹 规格 标准径2级牙钻孔径标准径 2级牙钻孔径美 制 特 细 螺 纹 规 格 (螺丝牙外径) 美 制 细 螺 纹 美 制 管 螺 纹 钻 孔 径 标准径 美 制 粗 螺 纹 标准径2级牙钻孔径公 制 粗 螺 纹 公 制 迫 牙 丝 攻 钻 孔 径 规 格精 度 等 级公 制 细 螺 纹 2级牙钻孔径标准径规格14.95 18.6320.5924.12最小6.568.5711.4541.3745.4949.6751.4327.8830.2934.9438.958.49511.341英 制 管 螺 纹 钻孔径 最小规格标准径N P T 14.84623.97530.11138.77218.48944.66556.476 英 制 管 螺 纹 规格18.2623.4229.366.3511.1314.68N P S 44.4556.36 38.108.7457.30 6.490注：迫牙丝攻之钻孔径，在上表所列之数值，由于被加工 材料之材质、硬度、形状、尺寸等之影响，多少会有所变动，因此于参考上表之同时，亦请增减若干。 标准径2级牙钻孔径标准径 2级牙钻孔径
螺纹加工尺寸对照表.doc
螺纹加工尺寸对照表 普通粗牙螺孔 普通细牙螺孔 圆锥管螺孔 圆柱管螺孔 攻丝前钻孔尺寸 攻丝前钻孔尺寸 攻丝前钻孔尺寸 攻丝前钻孔尺寸 底孔 公称尺 底孔 底孔 公称尺 底孔 公称尺寸 底孔 底孔 d 公称尺寸 公称尺寸 公称尺寸 d 寸 d d 寸 d 中国 (新) d M5× M8×1 M12× M20×2 ″ G1/8 ″ Rc1/8 M6×1 M10×1 M14× M22×2 Rc1/4″ G1/4″ M8× M12×1 M16× M24×2 Rc3/8″ G3/8″ M10× M14×1 M18× M27×2 Rc1/2″ G1/2″ M12× M16×1 M20× M30×2 ″ G3/4 ″ Rc3/4 M14×2 M18×1 M22× M33×2 ″ ″ Rc1 G1 M16×2 M20×1 M24× M36×2 Rc11/ 4″ G1 1/8″ M18× M22×1 M27× M42×2 Rc11/ 2″ G1 1/4″ M20× M24×1 M30× M48×2 Rc2″ G1 1/ 2 ″ M24×3 M27×1 M33× M52×2 Rc21/ 2″ G1 3/ 4 ″ 51 M27×3 M30×1 M36× M30×3 Rc3″ G2″
M30×M42×M33×3G1 1/4″ M33×M48×M36×3锥管G2 1/2″ M36×4M48×3螺纹G2 3/4″ M48×5M52×355 度G3 M52×5 M56× M64×6 说明：螺纹表示法： M：表示螺纹，后面第一组数字表示螺纹大经，即公称直径。×后面的表示螺距。单位是毫米。
攻牙下孔径对照表
建議下孔徑Recommended Tap Drill Sizes ◎公製牙
● ● D1：Minor diameter of JIS Class 2 internal thread. But, the minor diameters D1 shown in ( ) are of JIS Class I internal threads because their nominal sizes are not specified in JIS Class 2. ● * Marked sizes have been eliminated from JIS since 1969. ◎公製牙
● The reccommended tap drill sizes indicated above are for JIS Class 2 Metric threads. ● D1：Minor diameter of JIS Class 2 internal thread. But, the minor diameters D1 shown in ( ) are of JIS Class I internal threads because their nominal sizes are not specified in JIS Class 2. ◎美製牙─ UNC，UNF
● The recommended tap drill sizes indicated above are for JIS Class 2B UNC & UNF threads, and ANSI BI . Ia Class 2B UNEF & UN threads. ● D1：Minor diameter of internal thread. For UNC and UNF threads, according to JIS Class 2B; For UNEF and UN threads, according to ANSI BI . Ia, Class 2B. ◎英製牙─ BSW ● The recommended tap drill sizes indicated above are for JIS Class 2 Whitworth threads. ● Generally, the tap drill sizes in column A are used for producing holes; When holes tend to be cut oversized, the tap drill sizes in column B should be selected. ● These tap drill sizes are in accordance with JIS B 1004-1966, while the nominal sizes with a * mark are in accordance with BSW (Please refer to page 135).
攻牙底孔的使用参数表
攻牙底孔的使用参数表 发布:admin | 发布时间: 2011年7月18日 攻牙底孔的使用参数表 一、螺紋下孔徑表 1、公制粗牙螺紋 JIS B 0209-1982(單位：mm) 螺纹尺寸钻头直径螺纹下孔徑內螺紋小徑 最小直径最大直径 M 1 × 0.25 0.75 0.78 (80%) 0.729 0.785 1.1 × 0.25 0.85 0.88 (80%) 0.829 0.885 1.2 × 0.25 0.95 0.98 (80%) 0.929 0.985 1.4 × 0.3 1.1 1.14 (80%) 1.075 1.142 1.6 × 0.35 1.25 1.32 (75%) 1.221 1.321 1.8 × 0.35 1.45 1.52 (75%) 1.421 1.521 2 × 0.4 1.6 1.65 (80%) 1.567 1.679 2.2 × 0.45 1.75 1.83 (75%) 1.713 1.838 2.5 × 0.45 2.1 2.13 (75%) 2.013 2.138 3 × 0.5 2.5 2.59 (75%) 2.459 2.599 3.5 × 0.6 2.9 3.01 (75%) 2.850 3.010 4 × 0.7 3.3 3.39 (80%) 3.242 3.422 4.5 × 0.75 3.8 3.85 (80%) 3.688 3.878 5 × 0.8 4.2 4.31 (80%) 4.134 4.334 6 × 1 5 5.13 (80%) 4.91 7 5.153 7 × 1 6 6.13 (80%) 5.917 6.153 8 × 1.25 6.8 6.85 (85%) 6.647 6.912 9 × 1.25 7.8 7.85 (85%) 7.647 7.912 10 × 1.5 8.5 8.62 (85%) 8.376 8.676 11 × 1.5 9.5 9.62 (85%) 9.376 9.676 12 × 1.75 10.3 10.40 (85%) 10.106 10.441 14 × 2 12 12.2 (85%) 11.835 12.210 16 × 2 14 14.2 (85%) 13.835 14.210 18 × 2.5 15.5 15.7 (85%) 15.294 15.744 20 × 2.5 17.5 17.7 (85%) 17.294 17.744 22 × 2.5 19.5 19.2 (85%) 19.294 19.744 24 × 3 21 21.2 (85%) 20.752 21.252 27 × 3 24 24.2 (85%) 23.752 24.252 30 × 3.5 26.5 26.6 (90%) 26.211 26.771 33 × 3.5 29.5 29.6 (90%) 29.211 29.771 36 × 4 32 32.1 (90%) 31.670 32.270 39 × 4 35 35.1 (90%) 34.670 35.270 42 × 4.5 37.5 37.6 (90%) 37.129 37.799 45 × 4.5 40.5 40.6 (90%) 40.129 40.799