BS 919-1-2007 Screw gauge limits and ntolerances – nPart 1 Specification for gauges for nscrew threads of unified form《螺纹规限值和公差 统一型螺纹量规用规范》.pdf
《BS 919-1-2007 Screw gauge limits and ntolerances – nPart 1 Specification for gauges for nscrew threads of unified form《螺纹规限值和公差 统一型螺纹量规用规范》.pdf》由会员分享,可在线阅读,更多相关《BS 919-1-2007 Screw gauge limits and ntolerances – nPart 1 Specification for gauges for nscrew threads of unified form《螺纹规限值和公差 统一型螺纹量规用规范》.pdf(52页珍藏版)》请在麦多课文档分享上搜索。
1、BS 919-1:2007S c r e w g a u g e l i m i t s a n d t o l e r a n c e s Part 1: Specification for gauges for screw threads of unified formICS 21.040.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDIncorporating Corrigendum No.1Publishing and copyright informati
2、onThe BSI copyright notice displayed in this document indicates when the document was last issued. BSI 200ISBN978 0 5809The following BSI references relate to the work on this standard: Committee reference TDW/4 Draft for comment 07/30158512 DCPublication historyFirst published April 1952 Second edi
3、tion,December 1960 Third edition, November 2007Amendments issued since publicationAmd. no. Date Te xt a f f e c t e dBS 919-1:20076C1 See foreword6 58630 September 20096 BSI 200 iBS 919-1:2007ContentsForeword iii1 Scope 12 Normative references 13 Terms and definitions andsymbols 14 Design 25 Toleran
4、ces and thread forms 36 Marking 25AnnexesAnnex A (informative) Verifying conformity with BS 1580 26Annex B (informative) Conventional illustration of tolerance zones 34Annex C (informative) Effective diameter equivalent of pitch and angle errors 34Annex D (informative) A system of gauging for screw
5、threads before and after coating 37Annex E (informative) Setting to size of adjustable screwring gauges 40Annex F (informative) Comparison between the designations of British and American gauges 42Annex G (informative) Tolerances for major, effective and minor diameters and flank angle and pitch 43A
6、nnex H (informative) Hardness 44Bibliography 45List of figuresFigure 1 Disposition of effective diameter tolerance zones for screw gauges 18Figure 2 Thread forms of GOgauges 20Figure 3 Thread forms of NOT GO gauges 21Figure 4 Forms of thread for NOT GO effective diameter screw gauges 22Figure 5 Thre
7、ad forms of setting plugs 24Figure B.1 Limits and tolerancesfor the effective diameters of internal and external threads 34List of tablesTable 1 Tolerances for GOscrew plug gauges all classes 5Table 2 Tolerances for NOT GOscrew plug gauges all classes 6Table 3 Tolerances for GOand NOT GO plain plug
8、gauges for minordiameters 7Table 4 Tolerances for GOscrew ring gauges solid type, all classes 7Table 5 Tolerances for NOT GO effective diameter screw ring gauges solid type, all classes 8Table 6 Tolerances for GOscrew check plugs for GOscrew ring gauges solid type 8Table 7 Tolerances for NOT GOeffec
9、tive diameter check plugs for new GO screw ring gauges solid type 99BS 919-1:2007ii BSI20Table 8 Tolerances for NOT GO effective diameter check plugs for worn GOring screwgauges solid type 9Table 9 Tolerances for GO screw check plugs for NOT GO effective diameter ring gauges solid type 10Table 10 To
10、lerances for NOT GO screw check plugs for NOT GO effective diameter ring gauges solid type 10Table 11 Tolerances for GO and NOT GO plain check plugs for the minor diameters ofGO and NOT GO screw ringgauges solidtype 10Table 12 Tolerances for adjustableGO screw ring and calliper gauges for all classe
11、s 11Table 13 Tolerances for adjustable NOT GO screw ringand calliper gauges for all classes 12Table 14 Tolerances for double length setting plugs for adjustable GOscrew ringgauges 13Table 15 Tolerances for double lengthsetting plugs for adjustable NOT GO screw ring gauges 14Table 16 Tolerances forsi
12、ngle length setting plugs for adjustable GO screw calliper gauges 15Table 17 Tolerances for single length setting plugs for adjustable NOT GO screw calliper gauges 15Table 18 Tolerances for GO and NOT GO plain calliper(GAP) gauges for major diameters 16Table 19 Constants for use incalculating gauge
13、dimensions (inch) 17Table C.1 Effective diameterequivalents of errors in pitch 35Table C.2 Effective diameter equivalents of errors in flank angles 36Table D.1 External threads with specified allowances which have to be maintained after coating Unified threads, Class 1A 38Table D.2 External screw th
14、reads with specified allowances (in the uncoated condition) which can be absorbed by the coating Unified threads, Class 2A 38Table D.3 External screw threads with no specified allowance Unified threads, Class 3A 39Table D.4 Unified threads, Classes 1B and 2B 39Table D.5 Unified threads, Class 3B 39T
15、able D.6 Summary ofGO and NOT GO screw gauges and plain gauges for checking unified threads 40Summary of pagesThis document comprises a front cover, an inside front cover, pagesitoiv, pages 1 to 45 and a back cover.9 BSI 200 iiiBS 919-1:2007F o r e w o r dPublishing informationThis British Standard
16、is published by BSI and came into effect on 30 November 2007. It was prepared by Subcommittee SFTSE/1, Screws and fasteners technical specification committee, under the authority of Technical Committee TDW/4, Technical product realization. A list of organizations represented on thesecommitteescan be
17、 obtained on request to their secretaries.BS 919, Screw gauge limits and tolerances is in four parts:Part 1: Specification for gauges for screw threads of unified formPart 2: Specification for gauges for screw threads of Whitworth and B.A. formsPart 3: Specification for gauges for screw threads of I
18、SO metric formPart 4: Limits of size for gauges for screw threads of unified form diameters in and largerSupersessionThis Part of BS 919 supersedesBS 919-1:1960, which is withdrawn.Relationship with other publicationsThis British Standard isintended for use with BS 1580, which specifies the correspo
19、nding screw threads.Information about this documentThis British Standard has been fully revised to bring it up to date.Presentational conventionsThe provisionsof this standard are presented in roman (i.e. upright) type. Its requirements are expressed in sentences in which the principal auxiliary ver
20、b is “shall”.Commentary, explanation and general informative material is presented in notes in smaller italic type, and does not constitute a normative element.Contractual and legal considerationsThis publication does not purport to include all the necessaryprovisions of a contract. Users are respon
21、sible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.14- - -The start and finish of text introduced or altered by orrigendum No. 1 is indicated in the text by tags PQ.9Civ BSI20 This page deliberately left blankBS 919-1:20079 BSI 200 1BS
22、919-1:20071ScopeThis part of BS 919 specifies requirements for the following types of gauges intended for usein the checking of products with unified screwthreads for conformity with BS 1580.a) Screw gauges:1) solid screw plug gauges, GO and NOT GO;2) solid screw ring gauges, GO and NOT GO;3) adjust
23、able screw ring gauges, GO and NOT GO;4) adjustable screw calliper gauges GO and NOT GO.b) Setting plugs for adjustable ring gauges and for calliper gauges,GO and NOT GO:1) double length;2) single length.c) Screw check plugs for solid screw ring gauges, GO and NOT GO.d) Plug gauges and calliper gaug
24、esfor the crest diameters of product threads, GO and NOT GO.Annex A gives information about the various types of gauges covered by BS 919. Annex B explains the conventional method for showing the tolerance zones of gauges. Guidanceon the calculation of the effective diameter equivalent of pitch and
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