1-1.各种规格钻头尺寸 1/64″ 1/32″ 3/64″ 1/16″ 5/64″ 3/32″ 7/64″ 1/8″ 9/64″ 5/32″ 11/64″ 3/16″ 13/64″ 7/32″ 15/64″ 1/4″ 17/64″ 9/32″ 19/64″ 5/16″ 21/64″ 11/32″ 23/64″ 3/8″ 分数钻头尺寸 ″ 0.3968mm ″ 0.7937 mm ″ 1.1906 mm ″ 1.5875 mm ″ 1.9843 mm ″ 2.3812 mm ″ 2.7781 mm ″ 3.1750 mm ″ 3.5718 mm ″ 3.9687 mm 4.3656 mm ″ 4.7625 mm ″ 5.1593 mm ″ 5.5562 mm ″ 5.9531 mm ″ 6.3500 mm ″ 6.7468 mm ″ 7.1437 mm ″ 7.5406 mm ″ 7.9375 mm ″ 8.3343 mm ″ 8.7312 mm ″ 9.1281 mm ″ 9.5250 mm 25/64″ 13/32″ 27/64″ 7/16″ 29/64″ 15/32″ 31/64″ 1/2″ 33/64″ 17/32″ 35/64″ 9/16″ 37/64″ 19/32″ 39/64″ 5/8″ 41/64″ 21/32″ 43/64″ 11/16″ 45/64″ 23/32″ 47/64″ 3/4″ 分数钻头尺寸 ″ 9.9218 mm ″ 10.318 mm ″ 10.715 mm ″ 11.112 mm ″ 11.509 mm ″ 11.906 mm ″ 12.303 mm ″ 12.700 mm ″ 13.096 mm ″ 13.493 mm ″ 13.890 mm ″ 14.287 mm ″ 14.684 mm ″ 15.081 mm ″ 15.478 mm ″ 15.875 mm ″ 16.271 mm ″ 16.668 mm ″ 17.065 mm ″ 17.462 mm ″ 17.859 mm ″ 18.256 mm ″ 18.653 mm ″ 19.050 mm 49/64″ 25/32″ 51/64″ 13/16″ 53/64″ 27/32″ 55/64″ 7/8″ 57/64″ 29/32″ 59/64″ 15/16″ 61/64″ 31/32″ 63/64″ 1″ 分数钻头尺寸 ″ 19.446 mm A ″ 19.843 mm B ″ 20.240 mm C ″ 20.637 mm D ″ 21.034 mm E ″ 21.431 mm F ″ 21.828 mm G ″ 22.225 mm H ″ 22.621 mm I ″ 23.018 mm J ″ 23.415 mm K ″ 23.812 mm L ″ 24.209 mm M ″ 24.606 mm N ″ 25.003 mm O 1″ 25.400 mm P Q R S T U V W X Y Z 字母钻头尺寸 ″ 5.9436 mm ″ 6.0452 mm ″ 6.1468 mm ″ 6.2484 mm ″ 6.35 mm ″ 6.5278 mm ″ 6.6294 mm ″ 6.7564 mm ″ 6.9088 mm ″ 7.0358 mm ″ 7.1374 mm ″ 7.366 mm ″ 7.493 mm ″ 7.6708 mm ″ 8.0264 mm ″ 8.2042 mm ″ 8.4328 mm ″ 8.6106 mm ″ 8.8392 mm ″ 9.0932 mm ″ 9.3472 mm ″ 9.5758 mm ″ 9.8044 mm ″ 10.0838 mm ″ 10.2616 mm ″ 10.4902 mm 1-2.各种规格钻头尺寸 号码钻头尺寸 号码钻头尺寸 号码钻头尺寸 1# ″ 5.7912mm 21# ″ 4.0386 mm 41# ″ 2.4384 mm 61# 2# ″ 5.6134 mm 22# ″ 3.9878 mm 42# ″ 2.3749 mm 62# 3# ″ 5.4102 mm 23# ″ 3.9116 mm 43# ″ 2.2606 mm 63# 4# ″ 5.3086 mm 24# ″ 3.8608 mm 44# ″ 2.1844 mm 64# 5# ″ 5.2197 mm 25# ″ 3.7973 mm 45# ″ 2.0828 mm 65# 6# ″ 5.1816 mm 26# ″ 3.7338 mm 46# ″ 2.0574 mm 66# 7# ″ 5.1054 mm 27# ″ 3.6576 mm 47# ″ 1.9939 mm 67# 8# ″ 5.0546 mm 28# ″ 3.5687 mm 48# ″ 2.0066 mm 68# 9# ″ 4.9784 mm 29# ″ 3.4544 mm 49# ″ 1.8542 mm 69# 10# ″ 4.9149 mm 30# ″ 3.2639 mm 50# ″ 1.778 mm 70# 11# ″ 4.8514 mm 31# ″ 3.048 mm 51# ″ 1.7018 mm 71# 12# ″ 4.8006 mm 32# ″ 2.9464 mm 52# ″ 1.6129 mm 72# 13# ″ 4.699 mm 33# ″ 2.8702 mm 53# ″ 1.5113 mm 73# 14# ″ 4.6228 mm 34# ″ 2.8194 mm 54# ″ 1.397 mm 74# 15# ″ 4.572 mm 35# ″ 2.794 mm 55# ″ 1.3208 mm 75# 16# ″ 4.4958 mm 36# ″ 2.7051 mm 56# ″ 1.1811 mm 76# 17# ″ 4.3942 mm 37# ″ 2.6416 mm 57# ″ 1.0922 mm 77# 18# ″ 4.3053 mm 38# ″ 2.5781 mm 58# ″ 1.0668 mm 78# 19# ″ 4.2164 mm 39# ″ 2.5273 mm 59# ″ 1.0414 mm 79# 20# ″ 4.0894 mm 40# ″ 2.4892 mm 60# ″ 1.016 mm 80# 号码钻头尺寸 ″ 0.9906 mm ″ 0.9652 mm ″ 0.9398 mm ″ 0.9144 mm ″ 0.889 mm ″ 0.8382 mm ″ 0.8128 mm ″ 0.7874 mm ″ 0.7416 mm ″ 0.7112 mm ″ 0.6604 mm ″ 0.635 mm ″ 0.6096 mm ″ 0.5715 mm ″ 0.5334 mm ″ 0.508 mm ″ 0.4572 mm ″ 0.4064 mm ″ 0.3683 mm ″ 0.3429 mm