Общий каталог OSG 2018 - 2019 - страница 673

Tap Drill Size Tap Drill Sizes - Metric Cut Taps To minimize tapping problems and lengthen tool life, use the largest drill Suggested Percentage of Full Thread in Tapped Holes possible to produce a minor diameter that will result in the lowest percentageof full thread consistent with adequate strength. A minor diameter thatMaterial*Deep HoleAverageThin Sheet StockTappingCommercial Workor Stamping provides a 55% to 65% thread is sufficient for most requirements, but in somecases a higher percentage of thread may be necessary to conform with theminor diameter limits of the thread class specified.FreeCuttingAluminum, Brass, Bronze,Cast Iron, Copper, MildSteel, Tool Steel60% - 70%65% - 70%75% - 85% * Generally, deeper than 1 1/2 times the hole diameter. Hard or Cast Steel, Drop Tough Forging, Monel Metal, 55% - 65% 60% - 70% Cutting Nickel Steel, Stainless Steel Pitch Minor Dia. (mm) Tap Drill Diameter - Cut Taps TapSize M MF Min. Max. 80% Thread6H6H(mm)(in) 75% Thread(mm)(in) 70% Thread(mm) (in) 65% Thread(mm)(in) 60% Thread(mm)(in) M1.6 0.35 – 1.221 1.321 1.24 0.0488 1.26 0.0496 1.28 0.0504 1.30 0.0512 1.33 0.0524 M1.7 0.35 – 1.321 1.421 1.33 0.0524 1.36 0.0535 1.38 0.0543 1.40 0.0551 1.42 0.0559 M1.8 0.35 – 1.422 1.519 1.44 0.0567 1.46 0.0575 1.48 0.0583 1.50 0.0591 1.53 0.0602 M2 0.4 – 1.567 1.679 1.58 0.0622 1.61 0.0634 1.64 0.0646 1.66 0.0654 1.69 0.0665 M2.2 0.45 – 1.715 1.836 1.73 0.0681 1.76 0.0693 1.79 0.0705 1.82 0.0717 1.85 0.0728 M2.5 0.45 – 2.013 2.138 2.03 0.0799 2.06 0.0811 2.09 0.0823 2.12 0.0835 2.15 0.0846 M2.6 0.45 – 2.113 2.238 2.13 0.0839 2.16 0.0850 2.19 0.0862 2.22 0.0874 2.25 0.0886 M3 0.5 – 2.459 2.599 2.48 0.0976 2.51 0.0988 2.55 0.1004 2.58 0.1016 2.61 0.1028–0.352.6212.7212.630.10352.660.10472.680.10552.700.10632.720.1071 M3.5 0.6 – 2.850 3.010 2.88 0.1134 2.92 0.1150 2.95 0.1161 2.99 0.1177 3.03 0.1193 M4 0.7– – 3.242 3.422 3.27 0.1287 3.32 0.1307 3.36 0.1323 3.41 0.1343 3.45 0.13580.53.4593.5993.480.13703.510.13823.540.13943.580.14093.610.1421 M4.5 0.75 – 3.688 3.876 3.72 0.1465 3.77 0.1484 3.82 0.1504 3.87 0.1524 3.92 0.1543 M5 0.8– – 4.134 4.334 4.17 0.1642 4.22 0.1661 4.27 0.1681 4.32 0.1701 4.38 0.17240.54.4584.6004.480.17644.510.17764.540.17874.580.18034.610.1815 M6 1 – 4.917 5.153 4.96 0.1953 5.03 0.1980 5.09 0.2004 5.16 0.2031 5.22 0.2055–0.755.1875.3775.220.20555.270.20755.320.20945.370.21145.410.2130 M7 1 – 5.918 6.152 5.96 0.2346 6.03 0.2374 6.09 0.2398 6.16 0.2425 6.22 0.2449 1.25 – 6.647 6.912 6.70 0.2638 6.78 0.2669 6.86 0.2701 6.94 0.2732 7.03 0.2768 M8 – 1 6.917 7.153 6.96 0.2740 7.03 0.2768 7.09 0.2791 7.16 0.2819 7.22 0.2843 – 0.75 7.187 7.377 7.22 0.2843 7.27 0.2862 7.32 0.2882 7.37 0.2902 7.41 0.2917 1.5 – 8.376 8.676 8.44 0.3323 8.54 0.3362 8.64 0.3402 8.73 0.3437 8.83 0.3476 M10 –– 1.25 8.647 8.912 8.70 0.3425 8.78 0.3457 8.86 0.3488 8.94 0.3520 9.03 0.355518.9179.1538.960.35289.030.35559.090.35799.160.36069.220.3630 – 0.75 9.188 9.378 9.22 0.3630 9.27 0.3650 9.32 0.3669 9.37 0.3689 9.41 0.3705 1.75 – 10.106 10.441 10.18 0.4008 10.30 0.4055 10.41 0.4098 10.52 0.4142 10.64 0.4189 M12 –– 1.5 10.376 10.676 10.44 0.4110 10.54 0.4150 10.64 0.4189 10.73 0.4224 10.83 0.42641.2510.64710.91210.700.421310.780.424410.860.427610.940.430711.030.4343 – 1 10.917 11.153 10.96 0.4315 11.03 0.4343 11.09 0.4366 11.16 0.4394 11.22 0.4417 M14 2– – 11.835 12.210 11.92 0.4693 12.05 0.4744 12.18 0.4795 12.31 0.4846 12.44 0.48981.512.37612.67612.440.489812.540.493712.640.497612.730.501212.830.5051 M16 2– – 13.835 14.210 13.92 0.5480 14.05 0.5531 14.18 0.5583 14.31 0.5634 14.44 0.56851.514.37614.67614.440.568514.540.572414.640.576414.730.579914.830.5839 M18 2.5– – 15.296 15.743 15.40 0.6063 15.56 0.6126 15.73 0.6193 15.89 0.6256 16.05 0.63191.516.37616.67616.440.647216.540.651216.640.655116.730.658716.830.6626 2.5 – 17.294 17.744 17.40 0.6850 17.56 0.6913 17.73 0.6980 17.89 0.7043 18.05 0.7106 M20 – 1.5 18.376 18.676 18.44 0.7260 18.54 0.7299 18.64 0.7339 18.73 0.7374 18.83 0.7413 – 1 18.917 19.153 18.96 0.7465 19.03 0.7492 19.09 0.7516 19.16 0.7543 19.22 0.7567 2.5 – 19.294 19.744 19.40 0.7638 19.56 0.7701 19.73 0.7768 19.89 0.7831 20.05 0.7894 M22 – 2 19.835 20.210 19.92 0.7843 20.05 0.7894 20.18 0.7945 20.31 0.7996 20.44 0.8047 – 1.5 20.376 20.676 20.44 0.8047 20.54 0.8087 20.64 0.8126 20.73 0.8161 20.83 0.8201 3 – 20.752 21.252 20.88 0.8220 21.08 0.8299 21.27 0.8374 21.47 0.8453 21.66 0.8528 M24 – 2 21.835 22.210 21.92 0.8630 22.05 0.8681 22.18 0.8732 22.31 0.8783 22.44 0.8835 – 1.5 22.376 22.676 22.44 0.8835 22.54 0.8874 22.64 0.8913 22.73 0.8949 22.83 0.8988 3 – 23.752 24.252 23.88 0.9402 24.08 0.9480 24.27 0.9555 24.47 0.9634 24.66 0.9709 M27 – 2 24.835 25.210 24.92 0.9811 25.05 0.9862 25.18 0.9913 25.31 0.9965 25.44 1.0016 – 1.5 25.376 25.676 25.44 1.0016 25.54 1.0055 25.64 1.0094 25.73 1.0130 25.83 1.0169 3.5 – 26.211 26.771 26.36 1.0378 26.59 1.0469 26.82 1.0559 27.04 1.0646 27.27 1.0736 M30 – 2 27.835 28.210 27.92 1.0992 28.05 1.1043 28.18 1.1094 28.31 1.1146 28.44 1.1197 – 1.5 28.376 28.676 28.44 1.1197 28.54 1.1236 28.64 1.1276 28.73 1.1311 28.83 1.1350 M33 3.5– – 29.211 29.771 29.36 1.1559 29.59 1.1650 29.82 1.1740 30.04 1.1827 30.27 1.1917230.83531.21030.921.217331.051.222431.181.227631.311.232731.441.2378 4 – 31.670 32.270 31.84 1.2535 32.10 1.2638 32.36 1.2740 32.62 1.2843 32.88 1.2945 M36 – 3 32.752 33.252 32.88 1.2945 33.08 1.3024 33.27 1.3098 33.47 1.3177 33.66 1.3252 – 2 33.835 34.210 33.92 1.3354 34.05 1.3406 34.18 1.3457 34.31 1.3508 34.44 1.3559 M39 4– – 34.670 35.270 34.84 1.3717 35.10 1.3819 35.36 1.3921 35.62 1.4024 35.88 1.4126236.83537.21036.921.453537.051.458737.181.463837.311.468937.441.4740 4.5 – 37.129 37.799 37.32 1.4693 37.62 1.4811 37.91 1.4925 38.20 1.5039 38.49 1.5154 M42 – 3 38.752 39.252 38.88 1.5307 39.08 1.5386 39.27 1.5461 39.47 1.5539 39.66 1.5614 – 2 39.835 40.210 39.92 1.5717 40.05 1.5768 40.18 1.5819 40.31 1.5870 40.44 1.5921 FORMULA: TAP DRILL SIZE FORMULA: PERCENTAGE OF FULL THREAD Drill Size = Tap Major Dia - Pitch x % of Full Thread76.980 % of Full Thread = (Tap Major Dia. - Drill Dia.) x 76.980Pitch Example: Determine Drill Size for M12 x 1.75 Tap, 70% Full Thread. Example: Determine the % of Full Thread for M12 x 1.75 Tap, using 10.41mm Drill. Basic Major Diameter of Tap = 12mm Pitch = 1.75 1.75 x 70 = 122.5 ÷ 76.980 = 1.59mm 12-10.41 = 1.59mm x 76.980 ÷ 1.75 = 70 Drill Size =10.41mm Percentage of Full Thread = 70% WWW.OSGTOOL.COM Threading Technical 673