1、BRITISH STANDARD BS 1660-4: 1989 ISO 297:1988 Machine tapers Part 4: Specification for spindle noses and tool shanks with self-release 7/24 tapers ISO title: 7/24 tapers for tool shanks for manual changing UDC 621.9-229.22:621.886.4BS1660-4:1989 This British Standard, having been prepared under the
2、direction of the Machine, Engineers and Hand Tools Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 31 May 1989 BSI 09-1999 First published September 1988 First revision May 1989 The following BSI references relate to the work on this standar
3、d: Committee reference MTE/7 Drafts for comment 87/77517 DC and 86/78124 DC ISBN 0 580 17271 6 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 MT
4、E/7, upon which the following bodies were represented: Advanced Manufacturing Technology Research Institute Gauge and Tool Makers Association Institution of Production Engineers Milling Cutter Association Twist Drill and Reamer Association Amendments issued since publication Amd. No. Date of issue C
5、ommentsBS1660-4:1989 BSI 09-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative references 1 3 Interchangeability 1 4 Tapers for spindle noses 2 5 Tapers for tool shanks 5 6 Tool shank collars 6 Table 1a) Designation and dimensions 3 Table 1b) Th
6、read specification 3 Table 2 Complementary dimensions 4 Table 3a) Designation and dimensions 5 Table 3b) Thread specification 6 Table 4 Designation and dimensions 6 Publications referred to Inside back coverBS1660-4:1989 ii BSI 09-1999 National foreword This Part of BS1660 has been prepared under th
7、e direction of the Machine, Engineers and Hand Tools Standards Policy Committee. It is identical with ISO297:1988 “7/24 tapers for tool shanks for manual changing” which was prepared jointly by Technical Committees ISO/TC39 and ISO/TC29 of the International Organization for Standardization (ISO) and
8、 in the development of which the United Kingdom played an active part. This Part of BS1660 includes tapers of sizes55,65,70,75 and80. Size55 tapers, however, are non-preferred. Other Parts of BS 1660 currently published are as follows. Part 1: Specification for shanks and sockets with self-holding t
9、apers (Morse and metric5%); Part 2: Specification for reduction sleeves and extension sockets for tools with Morse taper shanks; Part 3: Specification for turret sockets and reduction sleeves with tapped ends for tools with Morse taper shanks; Part 5: Specification for adaptors with 7/24 internal an
10、d external tapers; Part 6: Specification for adaptors with external 7/24 tapers for tools with Morse taper shanks; Part 7: Specification for extension adaptors with external 7/24 tapers for tools with Morse taper shanks; Part 9: Specification for cotter slots; Part 10: Specification for drill chuck
11、tapers (Jacob and short Morse). BS 1660-1 to BS 1660-10 collectively superseded BS 1660:1972 which was withdrawn in 1988. This Part supersedes BS1660-4:1988 and BS1660-8:1988 which are withdrawn. Terminology and conventions. The text of the International Standard has been approved as suitable for pu
12、blication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. The comma has been used as a decimal marker. In British Standards it is current practice to use a full p
13、oint on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “British Standard”. Inch dimensions. In accordance with the UK policy of metrication, inch dimensions given in this standard are not used and are include
14、d for information purposes only. The Technical Committee has reviewed the provisions of ISO4762:1977, to which reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A related British Standard to ISO4762:1977 is BS4168 “Hexagon socket screw
15、s and wrench keys: metric series” Part1:1981 “Specification for hexagon socket head cap screws”. Cross-references International standard Corresponding British Standard ISO 7388-1:1983 BS 6607 Tool shanks with 7/24 taper for automatic tool changers Part 1:1985 Specification for shanks Nos.40,45 and50
16、 (Identical)BS1660-4:1989 BSI 09-1999 iii Additional information. The concentricity tolerance should be of AT4 quality as given in BS4500 “ISO limits and fits” Part5 “Systems of cone tolerances for conical workpieces from C = 1 : 3 to1 : 500 and lengths from6mm to 600mm”. A British Standard does not
17、 purport to 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. Summary of pages This document comprises a front cover, an inside fr
18、ont cover, pages i to iv, pages1to6, an inside back cover and a back 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.iv blankBS1660-4:1989 BSI 09-1999 1 1 Scope This Internati
19、onal Standard specifies the dimensions, in millimetres 1) , of7/24 tapers for spindle noses and tool shanks and equipment for manual changing. It also specifies the external diameters of the collars for these tool shanks and equipment, and the positioning of the front face of the collar with respect
20、 to the taper in the case of attachment by the front face. NOTE 1The collars have two seatings on the periphery into which the two driving tenons on the machine spindle are fitted and are intended for the transmission of the spindle rotational movement to the tool or equipment. NOTE 2Shank attachmen
21、t can be carried out either by conventional rear clamping, using a clamping fastener screwed on the rear side of the shank, or by front clamping of the collar using a locking device mounted on the machine spindle and applying the tool or equipment on to the spindle. Only in the latter case is it nec
22、essary for the positioning of the front face of the collar with respect to the taper gauge plane having the basic diameter D 1to be accurately specified. This type of taper is designed for various types of machine tool spindle noses as well as for the corresponding tool shanks and equipment. The dim
23、ensions for tool shank tapers automatic changers are specified in ISO7388-1. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. A
24、ll standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards.
25、 ISO 4762:1977, Hexagon socket head cap screws Product grade A. ISO 7388-1:1983, Tool shanks with7/24 taper for automatic tool changers Part 1: Shanks Nos.40,45 and 50 Dimensions. 3 Interchangeability This International Standard provides, as regards threads, two entirely distinct types of product ac
26、cording to the type of thread, M or UN. In order to distinguish between those two types, it is important that the component itself be marked with the corresponding thread symbol, each national standards body being free to adopt either of the two threads in its national standard. For all other dimens
27、ions, however, the products manufactured either to metric or to inch values are strictly interchangeable, though not absolutely identical. Acceptance conditions, if provided for in national standards, should therefore be such as to allow for the acceptance of products specified either in inch or in
28、metric values. 1) The inch values will be determined after acceptance of the metric values.BS1660-4:1989 2 BSI 09-1999 4 Tapers for spindle noses All dimensions are in millimetres. NOTEFor the spindle nose No.60, the tenons can be fixed by two screws, as for the spindle noses Nos.65 to80.BS1660-4:19
29、89 BSI 09-1999 3 Table 1a) Designation and dimensions Table 1b) Thread specification Designation No. Taper Recess b Tenon External centring D 1 z d 1 L d 2 b 1 v c n K D 2 m f g 1 a x a H12 min. min. c min. max. min. max. h5 min. d min. 30 31,75 0,4 17,4 73 17 15,9 0,06 8 8 16,5 16,5 69,832 12,5 54
30、M10 16 0,15 40 44,45 0,4 25,3 100 17 15,9 0,06 8 8 23 19,5 88,882 16 66,7 M12 20 0,15 45 57,15 0,4 32,4 120 21 19 0,06 9,5 9,5 30 19,5 101,6 18 80 M12 20 0,15 50 69,85 0,4 39,6 140 27 25,4 0,08 12,5 12,5 36 26,5 128,57 19 101,6 M16 25 0,2 55 88,9 0,4 50,4 178 27 25,4 0,08 12,5 12,5 48 26,5 152,4 25
31、120,6 M20 30 0,2 60 107,95 0,4 60,2 220 35 25,4 0,08 12,5 12,5 61 45,5 221,44 38 177,8 M20 30 0,2 65 133,35 0,4 75 265 42 32 0,1 16 16 75 58 280 38 220 M24 36 0,25 70 165,1 0,4 92 315 42 32 0,1 20 20 90 68 335 50 265 M24 45 0,25 75 203,2 0,4 114 400 56 40 0,1 25 25 108 86 400 50 315 M30 56 0,32 80 2
32、54 0,4 140 500 56 40 0,1 31,5 31,5 136 106 500 50 400 M30 63 0,32 a D 1 : Basic diameter defining the gauge plane. b Opening for traction bar. c Assembly of the tenon in the slot: M6-h5 fit. d Thread diameter g 1 : this is either a metric thread M with coarse pitch or, if expressly stated, a UN thre
33、ad according to Table 1b). In every case, the appropriate symbol M or UN shall be marked on the component. Designation No. 30 40 45 50 55 60 65 70 75 80 g 1 UN 0,375-16 UN 0,500-13 UN 0,500-13 UN 0,625-11 UN 0,750-10 UN 0,750-10 UN 1,000-8 UN 1,000-8 UN 1,250-7 UN 1,250-7 O 2 -BS1660-4:1989 4 BSI 09
34、-1999 For noses Nos. 30 to 60 NOTEFor spindle nose No. 60, the tenons can be fixed by two screws, as for the spindle noses Nos. 65 to80. For noses Nos. 65 to 80 Table 2 Complementary dimensions Designation No. Tenon Slot Screws ISO4762 Chamfer b 1 h k d 5 d 4 q l 7 l 8 s e g 2 l 6 l 7 u max. max. ma
35、x. 0,2 30 See Table 1a) 16 16,5 6,4 10,4 7 1,6 25 M6 9 M6 16 2 40 16 19,5 6,4 10,4 7 1,6 33 M6 9 M6 16 2 45 19 19,5 8,4 13,4 9 1,6 40 M8 12 M8 20 2 50 25 26,5 13 19 13 2 49,5 M12 18 M12 25 3 55 25 26,5 13 19 13 2 61,5 M12 18 M12 25 3 60 25 45,5 13 19 13 2 84 M12 18 M12 25 3 25 45,5 13 19 13 22 11,7
36、2 73 M12 18 22 M12 25 3 65 32 58 17 25 17 28 15 2,5 90 M16 25 28 M16 35 4 70 40 68 17 25 17 36 16 2,5 106 M16 25 36 M16 45 4 75 50 86 21 31 21 42 22 2,5 130 M20 30 42 M20 55 4 80 63 106 21 31 21 58 24 2,5 160 M20 30 58 M20 65 4BS1660-4:1989 BSI 09-1999 5 5 Tapers for tool shanksTable 3a) Designation
37、 and dimensions 1)Optional groove. Without groove, cylindrical joining surface with diameter D 3= D 10 0,5 Designation No. Taper Cylindrical tenon Collar Thread D 1 z L l 1 d 1 p d 3 y b t w d 2 d 4 g l 2 l 3 l 4 l 5 a h12 a10 H12 max. max. b min. min. 30 31,75 0,4 68,4 48,4 17,4 3 16,5 1,6 16,1 16,
38、2 0,12 13 16 M12 24 34 62,9 5,5 40 44,45 0,4 93,4 65,4 25,3 5 24 1,6 16,1 22,5 0,12 17 21,5 M16 32 43 85,2 8,2 45 57,15 0,4 106,8 82,8 32,4 6 30 3,2 19,3 29 0,12 21 26 M20 40 53 96,8 10 50 69,85 0,4 126,8 101,8 39,6 8 38 3,2 25,7 35,3 0,2 26 32 M24 47 62 115,3 11,5 55 88,9 0,4 164,8 126,8 50,4 9 48
39、3,2 25,7 45 0,2 26 36 M24 47 62 153,3 11,5 60 107,95 0,4 206,8 161,8 60,2 10 58 3,2 25,7 60 0,2 32 44 M30 59 76 192,8 14 65 133,35 0,4 246 202 75 12 72 4 32,4 72 0,3 38 52 M36 70 89 230 16 70 165,1 0,4 296 252 92 14 90 4 32,4 86 0,3 38 52 M36 70 89 280 16 75 203,2 0,4 370 307 114 16 110 5 40,5 104 0
40、,3 50 68 M48 92 115 350 20 80 254 0,4 469 394 140 18 136 6 40,5 132 0,3 50 68 M48 92 115 449 20 a D 1 : Basic diameter defining the gauge plane. b Thread diameter g: this is either a metric thread M with coarse pitch or, if expressly stated, a UN thread according to Table 3b). Inevery case, the appr
41、opriate symbol M or UN shall be marked on the component. 0 05 , BS1660-4:1989 6 BSI 09-1999 Table 3b) Thread specification 6 Tool shank collars All dimensions are in millimetres. Table 4 Designation and dimensions Designation No. 30 40 45 50 55 60 65 70 75 80 g UN 0,500-13 UN 0,625-11 UN 0,75-10 UN
42、1,000-8 UN 1,000-8 UN 1,25-7 UN 1,375-6 UN 1,375-6 UN 1,750-5 UN 1,750-5 Designation No. D 1 i a,b D D 4 b j b,c 0,1 max. min. 30 31,75 9,6 50 36 9 40 44,45 11,6 63 50 11 45 57,15 15,2 80 68 13 50 69,85 97,5 78 16 55 88,9 17,2 130 110 60 107,95 19,2 156 136 65 133,35 22 195 By agreement between cust
43、omer and supplier 70 165,1 24 230 75 203,2 27 280 80 254 34 350 a The distance between the front face of the collar and the gauge plane having the basic diameter D 1(and not the great base plane of the taper). b These values are only prescribed for those tools that are intended for attachment on the
44、 collar front face. c Tool fixing area.BS1660-4:1989 BSI 09-1999 Publications referred to See national foreword.BS 1660-4: 1989 ISO 297:1988 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It pre
45、sents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI
46、 to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel:02089969000. F
47、ax:02089967400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel:020
48、89969001. Fax:02089967001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as BritishStandards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European a
49、nd international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel:02089967111. Fax:02089967048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits
