1、BRITISH STANDARD BS 1660-1: 1992 ISO 296:1991 Machine tapers Part1: Specification for shanks and sockets with self-holding tapers (Morseand metric5%)BS1660-1:1992 This British Standard, having been prepared under the directionof the Machine Engineers and Hand Tools Standards Policy Committee, waspub
2、lished under the authorityof the Standards Boardand comes into effect on 31January1992 BSI 08-1999 First published September1988 Second edition January1992 The following BSI references relate to the work on this standard: Committee reference MTE/7 Special announcement in BSINews October1991 ISBN 0 5
3、80 20362 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Machine Engineers and Hand Tools Standards Policy Committee (MTE/-) to Technical Committee MTE/7, upon which the following bodies were represented: Advanced Manufacturing Technol
4、ogy Research Institute Federation of British Engineers Tool Manufacturers Gauge and Tool Makers Association Milling Cutter Association Twist Drill and Reamer Association Amendments issued since publication Amd. No. Date CommentsBS1660-1:1992 BSI 08-1999 i Contents Page Committees responsible Inside
5、front cover National foreword ii 1 Scope 1 2 Normative reference 1 3 Conicity tolerances 1 4 Dimensions 2 Figure 1 2 Figure 2 3 Table 1 Tapers 1 Table 2 Nos.0 to6Morse tapers and5% metric tapers 4 Table 3 Nos.1 to6Morse tapers and Nos.1 to3Brown and Sharpe tapers 5 Publication(s) referred to Inside
6、back coverBS1660-1:1992 ii BSI 08-1999 National foreword This Part of BS1660 has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee and implements agreements of the International Organization for Standardization (ISO). It is identical with ISO296:19
7、91 “Machine tools Self-holding tapers for tool shanks” prepared by Technical Committee ISO/TC39, Machine Tools. It is a revision of BS1660-1:1988 to harmonize requirements with the current International Standard. It supersedes BS1660-1:1988 which is withdrawn. A British Standard does not purport to
8、include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-reference International Standard Corresponding British Standard ISO1947:19
9、73 BS4500 ISO limits and fits Part5:1988 Specification for system of cone tolerances for conical work pieces from c=1:3 to1:500and lengths from6mm to630mm (Identical) Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to6, an inside back cover and a b
10、ack cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS1660-1:1992 BSI 08-1999 1 1 Scope This International Standard specifies the dimensions of self-holding tapers for tool sh
11、anks with a small taper of about4% to5%, classified, according to their use, into the three following catergories: a) tapers for general use; b) smaller tapers; c) larger tapers. For the first category, tapers recommended by ISO are Nos.1 to6 Morse tapers. Their standard sizes in millimetres are giv
12、en inTable 2, and the corresponding sizes in inches are given inTable 3. For smaller and larger tapers, those recommended by ISO are, on the one hand, Nos.4 and6 metric5% tapers and No.0 Morse taper, and on the other hand, Nos.80 to200 metric5% tapers, the sizes of which, in millimetres only, are gi
13、ven inTable 2. However, it was agreed to include in parallel, in the category of small tapers, Nos.1 to3Brown b) for sizes below No.1 Morse taper, two solutions, i.e.either Nos.4 and6 metric tapers and No.0 Morse taper (without corresponding tapers in inches inTable 3) or, alternatively, Nos.1 to3 B
14、rown c) for sizes above No.6 Morse taper, only Nos.80 to200metric tapers (without corresponding tapers in inches inTable 3). Table 1 Tapers This International Standard provides, for those elements which are threaded, two entirely distinct types of product according to the type of thread, M or UNC. I
15、n order to distinguish between those two types, it is important that the element itself be marked with the corresponding thread symbol and the type of taper symbol, as shown in the figures in clause4. Lastly, this International Standard specifies the dimensions of grooves and holes necessary for the
16、 design of tapers for applications where coolant supply is required. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standard
17、s are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO1947:1
18、973, System of cone tolerances for conical workpieces from C=1:3 to1:500 and lengths from6 to630mm. 3 Conicity tolerances The cone angle tolerances shall be those given in ISO1947 for quality AT5, and shall be positive on the external taper and negative on the internal taper. For special application
19、s, other cone angle tolerances in accordance with ISO1947 may be chosen. Designation Sizes in millimetres Sizes in inches Small tapers Nos.4 and6 metric and No.0 Morse Nos.1 to3 Brown & Sharpe Tapers for general use Nos.1 to6Morse a Large tapers Nos.80 to200metric a Except for threads, Nos.1 to6Mors
20、e tapers, manufactured either to metric values or to inch values, are strictly interchangeable, though not absolutely identical.BS1660-1:1992 2 BSI 08-1999 4 Dimensions Figure 1 BS1660-1:1992 BSI 08-1999 3 Figure 2 BS 1660-1:1992 4 BSI 08-1999 Table 2 Nos.0 to6Morse tapers and5% metric tapers Dimens
21、ions in millimetres Designation Metric tapers Morse tapers Metric tapers 4 6 0 1 2 3 4 5 6 80 100 120 160 200 Taper ratio 1:20=0,05 0,6246:12 =1:19,212 =0,05205 0,59858:12 =1:20,047 =0,04988 0,59941:12 =1:20,02 =0,04995 0,60235:12 =1:19,922 =0,0502 0,62326:12 =1:19,254 =0,05194 0,63151:12 =1:19,002
22、=0,05263 0,62565:12 =1:19,18 =0,05214 1:20=0,05 External taper D a D 1 D 2 d d 1 d 2 d 3 d 4 d 8 d 9 d 10 l 1 l 2 l 3 l 4 l 7 l 8 l 11 l 12 p b c e i R r t a a b a max. max. max. max. max. max. h13 c max. min. max. max. 4 2 4,1 2,9 2,5 23 25 2 6 3 6,2 4,4 4 32 35 3 9,045 3 9,2 6,4 6,1 6 6 50 53 56,5
23、 59,5 3,9 6,5 10,5 4 1 4 12,065 3,5 12,2 9,4 M6 9 8,7 9 6,4 8 8,5 53,5 57 62 65,5 4 3,3 5,2 8,5 13,5 16 5 1,2 5 17,78 5 18 15 14,6 M10 14 13,5 14 10,5 12,5 13,2 64 69 75 80 20 34 5 27 4,2 6,3 10 16 24 6 1,6 5 23,825 5 24,1 21 19,8 M12 19,1 18,5 19 13 15 17 81 86 94 99 29 43 5,5 36 5 7,9 13 20 24 7 2
24、 7 31,267 6,5 31,6 26 25,9 M16 25,2 24,5 25 17 20 22 102,5 109 117,5 124 39 55 8,2 47 6,8 11,9 16 24 32 8 2,5 9 44,399 6,5 44,7 40 37,6 M20 36,5 35,7 35,7 21 26 30 129,5 136 149,5 156 51 69 10 60 8,5 15,9 19 29 40 12 3 10 63,348 8 63,8 56 53,9 M24 52,4 51 51 26 31 11,5 182 190 210 218 81 99 11,5 90
25、10,2 19 27 40 47 18 4 16 80 8 80,4 70,2 M30 69 67 67 196 204 220 228 26 24 48 59 24 5 24 100 10 100,5 88,4 M36 87 85 85 232 242 260 270 32 28 58 70 30 5 30 120 12 120,6 106,6 M36 105 102 102 268 280 300 312 38 32 68 70 36 6 36 160 16 160,8 143 M48 141 138 138 340 356 380 396 50 40 88 92 48 8 48 200
26、20 201 179,4 M48 177 174 174 412 432 460 480 62 48 108 92 60 10 60 Internal taper d 5 d 6 d 7 l 5 l 6 l 9 l 10 l 13 g h p z H11 min. min. A13 d 3 25 21 2,2 8 0,5 4,6 34 29 3,2 12 0,5 6,7 52 49 3,9 15 1 9,7 7 56 52 5,2 19 1 14,9 11,5 19,5 67 62 22 32 27 6,3 22 4,2 1 20,2 14 24,5 84 78 31 41 36 7,9 27
27、 5 1 26,5 18 32 107 98 41 53 47 11,9 32 6,8 1 38,2 23 44 135 125 53 67 60 15,9 38 8,5 1 54,8 27 63 188 177 83 97 90 19 47 10,2 1 71,5 33 202 186 26 52 1,5 90 39 240 220 32 60 1,5 108,5 39 276 254 38 70 1,5 145,5 52 350 321 50 90 2 182,5 52 424 388 62 110 2 a For D 1and d or d 2 , approximate values
28、are given for guidance. (The actual values result from the actual values of a and l 1or l 3respectively, taking into account the taper ratio and the basic size D.) b d 1is the nominal thread diameter: either a metric thread M with standard pitch or, if expressly stated, a UNC thread (seeTable 3 for
29、inch sizes). In every case, the appropriate symbol M or UNC shall be marked on the component. c It is permissible to increase the length c over which the tenon is turned to diameter d 3 , but without exceeding e. d z is the maximum permissible deviation, outwards only, of the position of the gauge p
30、lane related to the basic size D from the nominal position of coincidence with the leading face. 0 0.1 0 0.1 0 0.1BS 1660-1:1992 BSI 08-1999 5 Table 3 Nos.1 to6Morse tapers and Nos.1 to3Brown & Sharpe tapers Dimensions in inches Designation Brown & Sharpe tapers Morse tapers 1 2 3 1 2 3 4 5 6 Taper
31、ratio 0,502:12 =1:23,904 =0,04183 0,502:12 =1:23,904 =0,04183 0,502:12 =1:23,904 =0,04183 0,59858:12 =1:20,047 =0,04988 0,58941:12 =1:20,02 =0,04995 0,60235:12 =1:19,922 =0,0502 0,62326:12 =1:19,254 =0,05194 0,63151:12 =1:19,002 =0,05263 0,62565:12 =1:19,18 =0,05214 External taper D a D 1 D 2 d d 1
32、d 2 d 3 d 4 d 8 d 9 d 10 l 1 l 2 l 3 l 4 l 7 l 8 l 11 l 12 p b c e i R r t a a b a max. max. max. max. max. max. h12 c max. min. max. max. 0,239 22 3/32 0,24314 0,2 0,18954 11/64 11/64 15/16 11/32 13/16 19/32 0,125 1/4 0,381 3/16 1/32 1/8 0,29968 3/32 0,3036 0,25 0,23693 7/32 7/32 13/16 19/32 11/2 1
33、19/32 0,1562 5/16 0,455 3/16 1/32 1/8 0,37525 3/32 0,37917 0,3125 0,29681 9/32 9/32 11/2 119/32 17/8 131/32 0,1875 3/8 0,532 3/16 3/64 1/8 0,475 1/8 0,4812 0,3937 0,369 UNC1/4 0,3534 11/32 11/32 0,25197 0,31496 0,33464 21/8 21/4 27/16 29/16 19/32 13/16 0,15748 1/8 0,2031 11/32 0,52 1/2 3/16 3/64 3/1
34、6 0,7 3/16 0,7094 0,5906 0,572 UNC3/8 0,5533 17/32 17/32 0,41338 0,49212 0,51968 29/16 23/4 215/16 31/8 25/32 111/32 0,19685 1,06299 11/64 0,25 13/32 0,66 3/4 1/4 1/16 3/16 0,938 3/16 0,9474 0,8268 0,778 UNC1/2 0,7529 23/32 23/32 0,51181 0,59055 0,68929 33/16 33/8 311/16 37/8 19/64 119/64 0,21653 1,
35、41732 13/64 0,3125 17/32 0,83 0,94488 9/32 5/64 1/4 1,231 1/4 1,244 1,1024 1,02 UNC5/8 0,9908 31/32 31/32 0,66929 0,7874 0,86614 41/16 45/16 45/8 47/8 117/32 23/16 0,32283 1,85039 9/32 0,4687 5/8 0,96 11/4 5/16 3/32 1/4 1,748 1/4 1,7612 1,5748 1,475 UNC5/8 1,4388 113/32 113/32 0,82677 1,02362 1,1811
36、 53/16 57/16 57/8 61/8 2 223/32 0,3937 2,3622 21/64 0,625 3/4 1,15 11/4 0,47244 1/8 5/16 2,494 1/16 2,5103 2,2047 2,116 UNC1 2,0639 2 2 1,02362 1,22047 1,41732 71/4 79/16 81/4 89/16 33/16 329/32 0,45275 3,5433 13/32 0,75 11/16 1,58 1,8504 0,70866 5/32 3/8 Internal taper d 5 d 6 d 7 l 5 l 8 l 9 l 10
37、l 13 g h p z H11 min. min. H12 d 0,203 1 29/32 0,141 13/32 0,04 0,255 11/4 11/8 0,172 9/16 0,04 0,319 19/16 113/32 0,203 23/32 0,04 0,378 9/32 17/32 23/16 21/16 43/64 1 1/16 0,223 3/4 1/8 0,0393 0,588 7/16 49/64 221/32 21/2 7/8 117/64 1,06299 0,27 7/8 11/64 0,0393 0,797 9/16 31/32 39/32 31/16 17/32
38、139/64 1,41732 0,333 11/8 13/64 0,0393 1,044 11/16 117/64 45/32 37/8 139/64 23/32 1,85039 0,493 11/4 9/32 0,0393 1,502 11/16 147/64 55/16 415/16 23/32 241/64 2,3622 0,65 11/2 21/64 0,0393 2,15748 11/18 231/64 73/8 7 317/64 313/16 3,5433 0,78 17/8 13/32 0,0393 a For D 1and d or d 2 , approximate valu
39、es are given for guidance. (The actual values result from the actual values of a and l 1or l 3respectively, taking into account the taper ratio and the basic size D.) b d 1is the nominal thread diameter: either a UNC thread or, if expressly stated, a metric thread M with standard pitch (seeTable 2 f
40、or metric sizes). In every case, the appropriate symbol UNC or M shall be marked on the component. c It is permissible to increase the length c over which the tenon is turned to diameter d 3 , but without exceeding e. d z is the maximum permissible deviation, outwards only, of the position of the ga
41、uge plane related to the basic size D from the nominal position of coincidence with the leading face. 0 0.004 0 0.004 0 0.0046 blankBS1660-1:1992 BSI 08-1999 Publication(s) referred to See national foreword.BS 1660-1: 1992 ISO296:1991 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInsti
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