1、BRITISH STANDARD BS1127-5: 1990 ISO7226:1988 Screwing dies and dienuts Part5: Specification for dimensions of hexagonal dienuts UDC 621.992.31BS1127-5:1990 This BritishStandard, having been prepared under the directionof the Machine, Engineers and Hand Tools Standards Policy Committee, waspublished
2、under the authorityof the Board of BSI andcomes into effect on 29June1990 BSI12-1999 First published November1943 First revision June1950 Second revision September1974 Second edition June1990 The following BSI references relate to the work on this standard: Committee reference MTE/4 Draft for commen
3、t 87/72648 DC ISBN 0 580 18565 6 Committees responsible for this BritishStandard The preparation of this BritishStandard was entrusted by the Machine, Engineers and Hand Tools Standards Policy Committee (MTE/-) to Technical Committee MTE/4, upon which the following bodies were represented: Advanced
4、Manufacturing Technology Research Institute British Electrical Systems Association (BEAMA Ltd.) Federation of British Engineers Tool Manufacturers Gauge and Tool Makers Association Institution of Production Engineers Screw Thread Tool Manufacturers Association Society of British Aerospace Companies
5、Limited Twist Drill and Reamer Association Amendments issued since publication Amd. No. Date of issue CommentsBS1127-5:1990 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii 0 Introduction 1 1 Scope and field of application 1 2 References 1 3 Dimensions and t
6、olerances 1 4 Marking 1 Figure Dimensions 1 Table 1 General table of dimensional characteristics of hexagonaldienutsfor metric and inch threads 2 Table 2 Table of dimensional characteristics of hexagonal dienutsforRseriespipe threads 2 Publications referred to Inside back coverBS1127-5:1990 ii BSI 1
7、2-1999 National foreword This Part of BS1127 has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee. It is identical with ISO7226:1988 “Hexagonal dienuts” published by the International Organization for Standardization (ISO). This Part of BS1127 tog
8、ether with Parts1,2,3 and4 supersedes BS1127:1974 which is withdrawn. BS1127 comprises the following Parts. Part1: Specification for hand- and machine-operated circular screwing dies and hand-operated die stocks; Part2: Specification for hand- and machine-operated circular screwing dies for taper pi
9、pe threads; R series; Part3: Specification for hand- and machine-operated circular screwing dies for parallel pipe threads; G series; Part4: Terminology for circular screwing dies; Part5: Specification for dimensions of hexagonal dienuts. BS1127 was first published in1943 as a war emergency standard
10、 and revised in1950 to include hexagonal dienuts and again in1974 to incorporate the change from inch to metric dimensions. The purpose of this present revision is to take account of changes made to related ISO standards since1974 and the requirement of the United Kingdom as a CEN member to give Eur
11、opean Standards EN22568, EN24230, EN24231 and EN25968 the status of national standards. ISO7726:1988, which was not adopted by CEN, is included for completeness of the screwing die series of standards. Cross-references International Standard Corresponding BritishStandard ISO7-1:1982 BS21:1985 Specif
12、ication for pipe threads for tubes and fittings where pressure-tight joints are made on the threads (metric dimensions) (Technically equivalent) ISO68:1973 BS3643: ISO metric screw threads Part1:1981 Principles and basic data (Technically equivalent) ISO228-1:1982 BS2779:1986 Specification for pipe
13、threads for tubes and fittings where pressure-tight joints are not made on the threads (metric dimensions) (Technically equivalent) ISO261:1973 BS3643 ISO metric screw threads Part1:1981 Principles and basic data (Technically equivalent) ISO263:1973 BS1580 Specification for Unified screw threads Par
14、ts1 R series (Identical)BS1127-5:1990 BSI 12-1999 iii A related BritishStandard to ISO68 is BS1580 “Specification for unified screw threads” Part3:1965 “Diameters below ! in”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are re
15、sponsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. International Standard Corresponding BritishStandard ISO4231:1987 Part3:1990 Specification for hand- and machine-operated circular screwing dies for parallel pipe th
16、reads; G series (Identical) Summary of pages This document comprises a front cover, an inside front cover, pagesitoiv, pages1 and2, 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 amend
17、ment table on the inside front cover.iv blankBS1127-5:1990 BSI 12-1999 1 0 Introduction Circular screwing dies are specified for certain thread forms in ISO2568, ISO4230 and ISO4231. For certain sizes of these threads, it is convenient for some purposes to use hexagonal dienuts instead of circular d
18、ies and, for purposes connected with their manufacture and use, it is desirable that certain dimensions of these dienuts should be standardized. 1 Scope and field of application This International Standard specifies the general dimensions of hexagonal dienuts for certain sizes of ISO metric threads
19、(coarse and fine pitch series see ISO68 and ISO261), ISO inch threads (UNCand UNF series see ISO68 and ISO263), and pipe threads (G and R series see ISO7-1 and ISO228-1), as well as the non-preferred thread series BSW, BSF and BA. 2 References ISO7-1, Pipe threads where pressure-tight joints are mad
20、e on the threads Part1: Designation, dimensions and tolerances. ISO68, ISO general purpose screw threads Basic profile. ISO228-1, Pipe threads where pressure-tight joints are not made on the threads Part1: Designation, dimensions and tolerances. ISO261, ISO general purpose metric screw threads Gener
21、al plan. ISO263, ISO inch screw threads General plan and selection for screws, bolts and nuts Diameter range0,06 to6in. ISO2568, Hand- and machine-operated circular screwing dies and hand-operated die stocks. ISO4230, Hand- and machine-operated circular screwing dies for taper pipe threads R series.
22、 ISO4231, Hand- and machine-operated circular screwing dies for parallel pipe threads G series. 3 Dimensions and tolerances See the Figure, and Table 1 and Table 2. 4 Marking Dienuts having dimensions in accordance with those given in Table 1 shall be marked with the relevant thread designation spec
23、ified in ISO2568. Dienuts having dimensions in accordance with those given in Table 2 shall be marked with the letter R immediately followed by the designation of the thread. Example: A hexagonal dienut for R series pipe threads with designation1/8 shall be marked as follows: R1/8 Where tools comply
24、 in all respects with the relevant International Standards, the symbol ISO may be appended to the mark at the discretion of the manufacturer. Figure DimensionsBS1127-5:1990 2 BSI 12-1999 Table 1 General table of dimensional characteristics of hexagonal dienuts for metric and inch threads (except R s
25、eries pipe threads) Table 2 Table of dimensional characteristics of hexagonal dienuts for R series pipe threads Range of thread diameter, d s h13 mm Metric pitches mm in 0,35 0,7 0,73 0,81 0,9 1 1,25 1,5 1,75 2 2,5 3 3,5 4 4,5 5 5,5 Over Up to and including Over Up to and including Number of threads
26、 per inch 48 40 36 32 28 24 22 18 16 14 13 12 11 10 9 8 7 6 5 41/2 Cutting width, E (mm) js13 2,65 4 0,104 3 0,157 5 18 5 a 7 4 6,35 0,157 5 0,25 7 7 7 6,35 9 0,25 0,354 3 21 9 9 9 9 11,2 0,354 3 0,440 9 27 11 11 11 11 11,2 15 0,440 9 0,590 6 36 10 a 10 a 14 14 15 21,2 0,590 6 0,834 6 41 14 a 14 a 1
27、4 a 18 18 21,2 26,5 0,834 6 1,043 3 50 16 a 16 a 16 a 22 22 26,5 37,5 1,043 3 1,476 4 60 18 a 18 a 18 a 18 a 25 25 25 37,5 42,5 1,476 4 1,673 2 70 20 a 20 a 20 a 30 30 42,5 53 1,673 2 2,086 6 85 22 a 22 a 22 a 36 36 36 36 53 63 2,086 6 2,480 3 100 22 a 22 a 22 a 36 36 36 a These cutting widths, whic
28、h are the lower of the two values specified for each range of thread diameter, may be increased to the higher value given in the table at the discretion of the manufacturer. Designation Basic diameter mm Approximate pitch mm s h13 mm Cutting width, E js13 mm 1/16 7,723 0,907 21 10 1/8 9,728 0,907 27
29、 10 1/4 13,157 1,337 36 14 3/8 16,662 1,337 41 15 1/2 20,955 1,814 50 19 3/4 26,441 1,814 60 20 1 33,249 2,309 60 24 1 1/4 41,91 2,309 85 26 1 1/2 47,803 2,309 85 26 2 59,614 2,309 100 31BS1127-5:1990 BSI 12-1999 Publications referred to See national foreword.BS1127-5: 1990 ISO7226:1988 BSI 389 Chis
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