Manual de brocas

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Decimal Equivalents & Tap Drill Sizes
DECIMAL EQUIVALENTS
MM, INCH AND WIRE SIZES
mm Inch Wire 0.1 mm 0. 2mm 0.3 mm 80 79 1/64 0.4 mm 78 77 0.5 mm 76 75 74 0.6 mm 73 72 71 0.7 mm 70 69 68 1/32 0.8 mm 67 66 65 0.9 mm 64 63 62 61 1.0 mm 60 59 58 57 56 3/64 55 54 53 1/16 52 51 50 49 48 5/64 47 2.0 mm 46 Decimal .0039 .0079 .0118 .0135 .0145 .0156 .0157 .0160 .0180 .0197 .0200 .0210 .0225 .0236.0240 .0250 .0260 .0276 .0280 .0292 .0310 .0312 .0315 .0320 .0330 .0350 .0354 .0360 .0370 .0380 .0390 .0394 .0400 .0410 .0420 .0430 .0465 .0469 .0520 .0550 .0595 .0625 .0365 .0670 .0700 .0730 .0760 .0781 .0785 .0787 .0810 mm Inch Wire 45 44 43 42 3/32 41 40 39 38 37 36 7/64 35 34 33 32 3.0 mm 31 1/8 30 29 28 9/64 27 26 25 24 23 5/32 22 4.0 mm 21 20 19 18 11/64 17 16 15 14 13 3/16 12 11 10 9 5.0 mm 87 13/64 6 Decimal .0820 .0860 .0890 .0935 .0937 .0960 .0980 .0995 .1015 .1040 .1065 .1094 .1100 .1110 .1130 .1160 .1181 .1200 .1250 .1285 .1360 .1405 .1406 .1440 .1470 .1495 .1520 .1540 .1562 .1570 .1575 .1590 .1610 .1660 .1695 .1719 .1730 .1770 .1800 .1820 .1850 .1875 .1890 .1910 .1935 .1960 .1968 .1990 .2010 .2031 .2040 mm Inch Wire 5 4 3 7/32 2 1 A 15/64 6.0 mm B C D 1/4 F G 17/64 H I 7.0 mm JK 9/32 L M 19/64 N 5/16 8.0 mm O P 21/64 Q R 11/32 S 9.0 mm T 23/64 U 3/8 V W 25/64 10.0 mm X Y 13/32 Z 27/64 11.0 mm 7/16 Decimal .2055 .2090 .2130 .2187 .2210 .2280 .2340 .2344 .2362 .2380 .2420 .2460 .2500 .2570 .2610 .2656 .2660 .2720 .2756 .2770 .2810 .2812 .2900 .2950 .2969 .3020 .3125 .3150 .3160 .3230 .3281 .3320 .3390 .3437 .3480 .3543 .3580 .3594 .3680 .3750 .3770 .3860 .3906 .3937.3970 .4040 .4062 .4130 .4219 .4332 .4375 mm Inch Wire 29/64 15/32 12.0 mm 31/64 1/2 13.0 mm 33/64 17/32 35/64 14.0 mm 9/16 37/64 15.0 mm 19/32 39/64 5/8 16.0 mm 41/64 21/32 17.0 mm 43/64 11/16 45/64 18.0 mm 23/32 47/64 19.0 mm 3/4 49/64 25/32 20.0 mm 51/64 13/16 21.0 mm 53/64 27/32 55/64 22.0 mm 7/8 57/64 23.0 mm 29/32 59/64 15/16 24.0 mm 51/64 31/32 25.0 mm 63/64 1 Decimal .4531 .4687 .4724 .4844.5000 .5118 .5156 .5312 .5469 .5512 .5625 .5781 .5906 .5937 .6094 .6250 .6299 .6406 .6562 .6693 .6719 .6875 .7031 .7087 .7187 .7344 .7480 .7500 .7656 .7812 .7874 .7969 .8125 .8268 .8281 .8437 .8594 .8661 .8750 .8906 .9055 .9062 .9219 .9375 .9449 .9531 .9687 .9842 .9844 1.0000 -

TAP DRILL SIZES
VARIOUS THREAD STYLES MACHINE SCREW SIZES NC AND NF
Nom. Size Tap 0-80 1-64 1-72 2-56 2-64 3-48 3-564-40 4-48 5-40 5-44 6-32 6-40 8-32 8-36 10-24 10-32 12-24 12-28 Recommended Probabale Actual Tap Drill Hole % Size Threaded Drill Decimal 3/64 .0469 .0484 71 53 .0595 .0610 59 53 .0595 .0610 67 50 .0700 .0717 62 50 .0700 .0717 70 47 .0785 .0804 69 46 .0810 .0829 69 43 .0890 .0910 65 3/32 .0938 .0958 60 38 .1015 .1038 65 37 .1040 .1063 63 36 .1065 .1091 71 33 .1130 .1156 69 29 .1360 .1389 62 29.1360 .1389 70 26 .1470 .1502 74 21 .1590 .1622 68 16 .1770 .1805 66 15 .1800 .1835 70 Nom. Size Tap 1/4-20 1/4-28 5/16-18 5/16-24 3/8-16 3/8-24 7/16-14 7/16-20 1/2-13 1/2-20 9/16-12 9/16-18 5/8-11 5/8-18 3/4-10 3/4-16 7/8-9 7/8-14 1-8 1-12

FRACTIONAL SIZES NC AND NF
Recommended Probabale Actual Tap Drill Hole % Size Threaded Drill Decimal 7 .2010 .2048 70 3 .2130 .2168 72 F .2570 .2608 72 I .2720.2761 67 5/16 .3125 .3169 72 Q .3320 .3364 71 U .3680 .3726 70 25/64 .3906 .3952 65 27/64 .4219 .4266 73 29/64 .4531 .4578 65 31/64 .4844 .4892 68 33/64 .5156 .5204 58 17/32 .5313 .5362 75 37/64 .5781 .5831 58 21/32 .6563 .6613 68 11/16 .6875 .6925 71 49/64 .7656 .7708 72 13/16 .8125 .8177 62 7/8 .8750 .8809 73 59/64 .9219 .9279 67

PIPE TAPS NPT, NPTF AND NPS
Tap Size 1/8-27 1/4-18 3/8-181/2-14 3/4-14 1-11-1/2 1-1/4-11-1/2 1-1/2-11-1/2 2-11-1/2 2-1/2-8 3-8 Drill Size NPT & NPTF Taper R 7/16 37/64 45/64 59/64 1-5/32 1-1/2 1-47/64 2-7/32 2-5/8 3-1/4 Decimal Equivalent 0.3390 0.4375 0.5781 0.7031 0.9219 1.1562 1.5000 1.7344 2.2188 2.6250 3.2500 Drill Size NPS Straight 11/32 7/16 37/64 23/32 59/64 1-5/32 1-1/2 1-3/4 2-7/32 2-21/32 Decimal Equivalent 0.3438 0.4375 0.5781 0.7188 0.9219...
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