1、ASME B94.1 IM-1993 (REVISION OF ANSI B94.11-1979) Twist Drills AN AMERICAN NATIONAL STANDARD The American Society of Mechanical Engineers I AN AMERICAN NATIONAL STANDARD I Twist Drills ASME B94.11N 93 W 0759670 0540651 071 m 1 1 1 L ASME B94.11M-1993 (REVISION OF ANSI B94.11-1979) The American Socie
2、ty of Mechanical Engineers ASIE B94-LI1 93 m 0759670 0540652 TOB m O Date of Issuance: March 31, 1994 This Standard will be revised when the Society approves the issuance of a new edition. There will be no addenda or written interpretations of the requirements of this Standard issued to this Edition
3、. ASME is the registered trademark of The American Society of Mechanical Engineers. This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Consensus Committee that approved the code or standard was balanced to assure that individu
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8、 which preclude the issuance of interpretations by individual volun- teers. No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. Copyright O 1994 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
9、All Rights Reserved Printed in U.S.A. ASME B94.11M 93 W O759670 0540b53 944 m FOREWORD (This Foreword is not a part of ASME 894.1 1 “1993.) The U.S.A. Standard Twist Drills-Straight Shank (USAS1 B5-12-1940) Standardized Drill Nomenclature and Major Dimensions, Technical Committee No. 7 on Twist Dril
10、ls was established in 1946 and a revision dated March 22, 1950 was issued. The committee was reactivated in 1956 and a revision dated December 15, 1958 was issued. The committee was again reactivated in 1964 and a redesignated USAS B94.11-1967 was issued on May 4, 1967. The above standard was reaffi
11、rmed in 1972 as ANSI B94.11-1967 (R1972). Technical Committee No. 7 was again reactivated in March 1978 for the purpose of reviewing ANSI B94.11-1967 (R1972) and considered a proposed Inch and Metric Standard submitted by the Metal Cutting Tool Institute and industry that reflects current U.S. drill
12、 usage. The proposal added metric sizes in jobbers series, screw machine series, taper length series, and taper shank series that were reflective of current industry practices and usage patterns. Metric sizes were not included for core drills, and combined drills and coun- tersinks, In addition the
13、entire standard was dual-dimensioned because of the metric additions. The suggestions were reviewed and a draft was approved by the Technical Committee on November 15, 1978 for submission to sectional committee B94 and sponsor organizations of ANSI. The revision was approved by the American National
14、 Standards Institute on August 29, 1979 and redesignated ANSI B94.11M-1979. Following the resignation and retirement of all but one of the members of the Technical Committee No. 7, new members were recruited so that revisions suggested by members of the United States Cutting Tool Institute could be
15、considered. A draft of the results of the committees deliberations was approved by the commitee on February 28, 1991. In addition to dealing with the USCTI suggestions, the committee also corrected many numerical and editorial errors. Other changes, designed to make this document easier to use, were
16、 also recommended. The recommended revision was approved by the American National Standards Institute on September 29,1993 and was redesignated ASME B94.11“ 1993. . 111 ASME STANDARDS COMMITTEE B94 Standardization of Cutting Tools, Holders, Drivers and Bushings (The following is the roster of the Co
17、mmittee at the time of approval of this Standard.) OFFICERS E. J. Czopor, Chairman E. W. McLaren, Secretary COMMllTEE PERSONNEL E. J. Czopor, E xTrsink angle Relief angle Chisel edge eter 7 DrLnd Cutting face right-hand rotation Bell Type FIG. 3 IDENTITY OF COMBINED DRILL AND COUNTERSINK FEATURES 5
18、W I 0 is CT 0 R I m ASME B74=11M 73 0757670 ASME B94.11M-1993 the countersink portion to produce clearance for the point of a conical center flutes - the helical or straight grooves cut or formed in the cutting portions and the body to provide cutting edges on both the drill and countersink portions
19、, to permit removal of chips and to allow cutting fluid to reach the cutting lips flute length - the length from the outer corners of the cutting lips to the extreme ends of the flutes. It includes the sweep of the tool used to generate the flutes and, therefore, does not indicate the usable length
20、of flutes. land - the peripheral drill and countersink portions between the adjacent flutes 0540661 Tl10 H TWIST DRILLS overall length - the length between the extreme points of the tools 3.2 Applicable Twist Drill Terms For definitions, see para. 2.1. chisel edge chisel edge angle hlix angle lips l
21、ip relief lip relief angle point angle web web thickness 6 TWIST DRILLS ASME BSY=LLM 93 m O759670 O540662 957 m ASME 894.1 1 M- 1993 Chamfer sizes 3/32 in. and larger. For sizes under 3/32 in. a chamfer or See Table 10 for tolerances conical point may be used at the manufacturers option. TABLE 1 GEN
22、ERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS - JOBBERS LENGTH - FRACTIONAL, NUMBER, LElTER AND METRIC SIZES Diameter of Drill D Fraction /M No. 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 - Ltr. T Millimeter 0.1 5 0.16 0.1 7 0.1 8 0.1 9 0.20 0.22 0.25 0.28 0.30 0.32 0.35 0.38 0.
23、40 0.42 0.45 Decimal Inch Equivalent 0.0059 0.0063 0.0067 0.0071 0.0075 0.0079 0.0083 0.0087 0.0091 0.0095 0.0098 0.01 O0 0.01 05 0.01 1 o 0.01 15 0.01 18 0.01 20 0.01 25 0.01 26 0.01 30 0.0135 0.01 38 0.01 45 0.01 50 0.01 56 0.01 57 0.0160 0.01 65 0.01 77 0.0180 7 Millimeter Equivalent 0.1 50 0.1 6
24、0 0.170 O. 180 o. 190 0.201 0.21 1 0.221 0.231 0.241 0.250 0.254 0.267 0.280 0.292 0.300 0.305 0.31 8 0.320 0.330 0.343 0.350 0.368 0.380 0.396 0.400 0.406 0.420 0.450 0.457 r r Flute Length F mm 1.6 1.6 1.6 1.6 1.6 1.6 2.0 2.0 2.0 2.0 2.0 2.0 2.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 3 3 3 5 5 5 5 5 5 5 f Ov
25、erall Length L mm 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 22 22 22 22 ASME B94.LLM 93 m 0759670 0540663 893 M ASME 894.1 1 M-I 993 TWIST DRILLS TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS - JOBBERS LENGTH - FRACTIONAL, NUMBER, LETTER AND METRIC SIZ
26、ES (CONTD) Diameter of Drill T Fraction No. - 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 D Ltr. - Millimeter 0.48 0.50 0.55 0.60 0.65 0.70 0.75 0.80 0.85 0.90 0.95 1 .o0 1 .O5 1.10 1.15 1.20 1.25 T Decimal Inch Equivalent 0.01 89 0.01 97 0.0200 0.021 o 0.0217 0.0225 0.0236 0.0240
27、 0.0250 0.0256 0.0260 0.0276 0.0280 0.0292 0.0295 0.031 O 0.031 2 0.031 5 0.0320 0.0330 0.0335 0.0350 0.0354 0.0360 0.0370 0.0374 0.0380 0.0390 0.0394 0.0400 0.041 O 0.041 3 0.0420 0.0430 0.0433 0.0453 0.0465 0.0469 0.0472 0.0492 8 Millimeter Equivalent 0.480 0.500 0.508 0.533 0.550 0.572 0.600 0.61
28、 O 0.635 0.650 0.660 0.700 0.71 1 0.742 0.750 0.787 0.792 0.800 0.81 3 0.838 0.850 0.889 0.899 0.91 4 0.940 0.950 0.965 0.991 1 .o00 1 .O1 6 1 .O41 1 .O50 1 .O67 1 .O92 1.100 1.150 1.181 1.191 1.200 1.250 t Flute Length F mm 5 5 5 6 6 6 8 8 8 10 10 10 10 13 13 13 13 13 13 13 16 16 16 16 16 16 16 17
29、17 17 17 17 17 19 19 19 19 19 22 22 Overall Length -L mm 22 22 22 25 25 25 29 29 29 32 32 32 32 35 35 35 35 35 35 35 38 38 38 38 38 38 38 41 41 41 41 41 41 44 44 44 44 44 48 48 TWIST DRILLS ASME 894.1 1 M-1 993 TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS - JOBBERS LENGTH - FRACTIONAL,
30、NUMBER, LETTER AND METRIC SIZES (CONTD) Diameter of Drill Fraction No. - 55 54 53 52 51 50 49 48 47 46 45 44 43 42 D Ltr. - r Millimeter 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1 .so 1.95 2.00 2.05 2.10 2.1 5 2.20 2.25 2.30 2.35 2.40 Decimal Inch Equivalent 0.051 2 0.0520 0.0531
31、0.0550 0.0551 0.0571 0.0591 0.0595 0.061 O 0.0625 0.0630 0.0635 0.0650 0.0669 0.0670 0.0689 0.0700 0.0709 0.0728 0.0730 0.0748 0.0760 0.0768 0.0781 0.0785 0.0787 0.0807 0.081 O 0.0820 0.0827 0.0846 0.0860 0.0866 0.0886 0.0890 0.0906 0.0925 0.0935 0.0938 0.0945 9 Millimeter Equivalent 1.300 1.321 1.3
32、50 1.397 1.400 I .450 1.500 1.511 1.550 1.588 1.600 1.613 1.650 1.700 1.702 1.750 1.778 1.800 1.850 1.854 1.900 1.930 1 .S50 1 384 1.994 2.000 2.050 2.057 2.083 2.1 O0 2.1 50 2.184 2.200 2.250 2.261 2.300 2.350 2.375 2.383 2.400 r t Flute Length F F mm 22 22 22 22 22 22 22 22 22 22 22 22 25 25 25 25
33、 25 25 25 25 25 25 25 25 25 25 29 29 29 29 29 29 32 32 32 32 32 32 32 35 Overall Length - Inch 1 I8 1 la 1 la 1 la 1 I0 1 la 1 I8 1 la 1 /a 1 la 1 la - I 71 2 2 2 2 2 2 2 2 2 2 2 2 2 2 21s 218 210 2 la 2 L 2 la 2 h 2 14 2 14 21s 2 h 2 14 2 14 231 - L mm 48 48 48 48 48 48 48 48 48 48 48 48 51 51 51 5
34、1 51 51 51 51 51 51 51 51 51 51 54 54 54 54 54 54 57 57 57 57 57 57 57 60 ASME B94*LLM 93 m 0759b70 0540bb5 bbb ASME 894.1 1 M-I993 TWIST DRILLS O TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS - JOBBERS LENGTH - FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONTD) Diameter of Dr _ Fractio
35、n 71 la 91 132 D No. 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 Ltr. Millimeter 2.46 2.50 2.60 2.70 2.80 2.90 3.00 3.1 O 3.20 3.30 3.40 3.50 3.60 3.70 3.80 3.90 i Decimal Inch Equivalent 0.0960 0.0965 0.0980 0.0984 0.0995 0.1015 0.1 024 O. 1 040 0.1 063 0.1 065 0.1 094 0.1 1 O0 0.1
36、102 0.1110 0.1130 0.1 142 0.1 160 0.1 181 0.1 200 0.1 220 0.1 250 0.1260 O. 1285 0.1299 0.1 339 0.1 360 0.1 378 0.1 405 0.1 406 0.1417 o. 1440 O. 1 457 0.1 470 0.1 495 0.1 496 0.1 520 0.1 535 O. 1540 0.1 562 0.1 570 Millimeter .Equivalent 2.438 2.450 2.489 2.500 2.527 2.578 2.600 2.642 2.700 2.705 2
37、.779 2.794 2.800 2.819 2.870 2.900 2.946 3.000 3.048 3.1 O0 3.175 3.200 3.264 3.300 3.400 3.454 3.500 3.569 3.571 3.600 3.658 3.700 3.734 3.797 3.800 3.861 3.900 3.91 2 3.967 3.988 T t Flute Length - Inch - I 31 I 31 I 31 131 131 1 71 1 7116 1 71 6 1 71 6 1 711 6 1 12 1 12 1 12 1 712 1 h 1 5h I 51 I
38、 510 I 51 I 51 1 5t8 I 51 1 5h 1 3/4 1 % 1 % 1 % 1 314 1 3/4 171 1 7h 1 7b 1 Ia I 71 1 71s 2 2 2 2 2 - F mm 35 35 35 35 35 37 37 37 37 37 38 38 38 38 38 41 41 41 41 41 41 41 41 44 44 44 44 44 44 48 48 48 48 48 48 51 51 51 51 51 t Overall Length mm 60 60 60 60 60 64 64 64 64 64 67 67 67 67 67 70 70 7
39、0 70 70 70 70 70 73 73 73 73 73 73 76 76 76 76 76 76 79 79 79 79 79 10 l a ASME B94.2LM 93 m 0759670 0540666 5T2 m TWIST DRILLS ASME B94.11M-1993 TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS - JOBBERS LENGTH - FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONTD) Diameter of Drill D Fract
40、ion Millimeter Ltr. No. 4.00 21 20 4.1 O 4.20 19 4.30 18 17 1/64 4.40 4.50 4.60 16 15 14 13 11 4.80 12 4.70 x 6 4.90 10 9 5.00 Decimal Inch Equivalent 0.1575 O. 1 590 0.1610 0.1614 O. 1654 O. 1660 0.1 693 0.1 695 0.1719 0.1 730 0.1 732 0.1770 0.1772 0.1 800 0.1 81 1 0.1 820 0.1 850 O. 1875 O. 1890 0
41、.1 91 o 0.1 929 0.1 935 0.1 960 0.1 969 11 Millimeter Equivalent 4.000 4.039 4.089 4.1 O0 4.200 4.216 4.300 4.305 4.366 4.394 4.400 4.496 4.500 4.572 4.600 4.623 4.700 4.762 4.800 4.851 4.900 4.91 5 4.978 5.000 5.055 5.1 O0 5.1 05 5.1 59 5.182 5.200 5.220 5.300 5.309 5.400 5.41 O 5.500 5.558 5.600 5
42、.613 5.700 Flute Length F Inch mm 2v8 54 211 54 211 54 21 54 2v8 54 2v8 54 2v8 54 2% 54 2 la 54 23h6 56 23h 56 2% 6 56 2% 6 56 2% 6 56 23h 56 2% 6 56 251 59 2 5t 6 59 2 5/16 59 2 51 6 59 2116 . 62 2116 62 2% 6 62 2% 6 62 2% 6 62 271 62 271 62 271 62 2 12 64 2 12 64 2 12 64 2 12 64 2 12 64 212 64 212
43、 64 212 64 212 64 251 67 ASME B94.11 M-1993 ASME B94.LLM 93 m 0759670 0540667 439 m TWIST DRILLS TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS - JOBBERS LENGTH - FRACTIONAL, NUMBER, LETER AND METRIC SIZES (CONTD) Diameter of Drill Fraction 5/M 14 /M 9h 19/64 No. 1 I Ltr. A B C D E F G H
44、I J K L M N r Millimeter 5.80 5.90 6.00 6.1 O 6.20 6.30 6.40 6.50 6.60 6.70 6.80 6.90 7.00 7.1 O 7.20 7.30 7.40 7.50 7.60 7.70 7.80 Decimal Inch Equivalent 0.2280 0.2283 0.2323 0.2340 0.2344 0.2362 0.2380 0.2402 0.2420 0.2441 0.2460 0.2480 0.2500 0.2520 0.2559 0.2570 0.2598 0.261 O 0.2638 0.2656 0.2
45、660 0.2677 0.271 7 0.2720 0.2756 0.2770 0.2795 0.281 O 0.2812 0.2835 0.2874 0.2900 0.2913 0.2950 0.2953 0.2969 0.2992 0.3020 0.3031 0.3071 Millimeter Equivalent 5.791 5.800 5.900 5.944 5.953 6.000 6.045 6.1 O0 6.1 47 6.200 6.248 6.300 6.350 6.400 6.500 6.528 6.600 6.629 6.700 6.746 6.756 6.800 6.900
46、 6.909 7.000 7.036 7.100 7.137 7.142 7.200 7.300 7.366 7.400 7.493 7.500 7.541 7.600 7.671 7.700 7.800 r t Flute Length mm 67 67 67 67 67 70 70 70 70 70 70 70 70 73 73 73 73 73 73 73 73 73 73 73 73 73 75 75 75 75 75 75 78 78 78 78 78 78 81 81 f Overall Length L mm 98 98 98 98 98 102 102 1 o2 102 102
47、 102 1 o2 102 105 105 105 105 105 105 105 105 105 105 105 105 105 108 108 108 108 108 108 111 111 111 111 111 111 114 114 12 ASME B7q.LLM 73 m 0757670 0540bb8 375 m I TWIST DRILLS ASME B94.11M-1993 TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS - JOBBERS LENGTH - FRACTIONAL, NUMBER, LETTE
48、R AND METRIC SIZES (CONTD) Diameter of Drill T Fraction 51 fi 21/64 132 23/64 31 25/64 No. 1 Ltr. O P Q R S T U V W X Y Millimeter 7.90 8.00 8.10 8.20 8.30 8.40 8.50 8.60 8.70 8.80 8.90 9.00 9.1 o 9.20 9.30 9.40 9.50 9.60 9.70 9.80 9.90 10.00 10.20 13 T Decimal Inch Equivalent 0.31 1 O 0.3125 0.31 5
49、0 0.31 60 0.3 189 0.3228 0.3230 0.3268 0.3281 0.3307 0.3320 0.3346 0.3386 0.3390 0.3425 0.3438 0.3465 0.3480 0.3504 0.3543 0.3580 0.3583 0.3594 0.3622 0.3661 0.3680 0.3701 0.3740 0.3750 0.3770 0.3780 0.381 9 0.3858 0.3860 0.3898 0.3906 0.3937 0.3970 0.401 6 0.4040 Millimeter Equivalent 7.900 7.938 8.000 8.026 8.1 O0 8.200 8.204 8.300 8.334 8.400 8.433 8.500 8.600 8.61 1 8.700 8.733 8.800 8.839 8.900 9.000 9.093 9.1 O0 9.129 9.200 9.300 9.347 9.400 9.500 9.525 9.576 9.600 9.700 9.800 9.804 9.90
