BS 4084-1996 UNJ threads, with controlled root radius, for aerospace. Inch series.
|
ID： |
1C8B9C50C88D4823A1F32FD6337748A1 |
|
文件大小(MB)： |
3.18 |
|
页数： |
41 |
|
文件格式： |
|
|
日期： |
2024-6-23 |
|
购买： |
文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
BRITISH STANDARD AEROSPACE SERIES,Aerospace 一,UNJ threads, with controlled,root radius, for aerospace 一,Inch series,BS 4084 : 1996,ISO 3161:1996,ICS 49.040.20,NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW,BS 4084 :1996,Committees responsible for this,British Standard,The preparation of this British Standard was entrusted to Technical Committee,ACE/12, Aerospace listeners and festening systems, upon which the following,bodies were represented：,Association of Electronic, Telecommunications and Business Equipment Industries,British Industrial Fasteners Federation,Ministry of Defence,Society of British Aerospace Companies,This British Standard, having,been prepared under the,direction of the Engineering,Sector Board, was published,under the authority of the,Standards Board and comes into,effect on,15 August 1996,. BSI1996 Amendments issued since publication,First published December 1978,Second edition August 1996,Amd. No. Date Text affected,The following BSI references,relate to the work on this,standard:,Committee reference: ACE/12,Draft for comment 92/80212 DC,ISBN 0 580 26147 6,BS 4084 : 1996,Contents,Page,Committees responsible Inside front cover,National foreword ii,Specification,1,2,3,Scope 1,Definition 1,Symbols 1,4,5,6,7,8,9,Basic profile of thread 1,Series of threads 2,Tolerances 3,Gauging by limit gauges 6,Designation of threads 6,Tables 7,Tables,1,2,Basic profile 8,Basic dimensions 9,3,4,5,6,7,Thread series 12,Limit values of the root radius R 14,Values of tolerances for profile dimensions 15,Maximum pennissible variation in the lead variation and half-angle 26,Basic profile data for use in calculation of special diameter/pitch,combinations 33,8 Pitch diameter tolerances for external threads of special diameterkitch,combinations (UNJS threads) 34,9 Pitch diameter tolerances for internal threads of special diameter/pitch,combinations (UNJS threads) 35,10 Minor diameter tolerances for internal threads of special diameter4)itch,combinations (UNJS threads) 36,Figures,1,2,3,Basic profile 2,Length of engagement 3,Internal thread tolerances 3,4,5_,External thread tolerances 4,Radius at the root of the screw thread 5,. BSI 1996,BS 4084:1996,National foreword,This British Standard has been prepared by Technical Committee ACE/12. It is,identical with ISO 3161:1996 Aerospace 一 UNJ threads, with controlled root radius,fin* aerospace -Inch series published by the International Organization for,Standardization (ISO). It supersedes BS 4084: 1978 which is withdrawn.,Compliance with a British Standard does not of itself confer immunity,from legal obligations.,. BSI1996,Aerospace - UNJ threads, with controlled root radius, for,aerospace - Inch series,1 Scope,This International Standard specifies the characteristics,of inch series UNJ threads with controlled root,radius.,It determines the basic triangular profile for this type,of thread and gives a system for designating the diameter/,pitch combinations. For all diameters 0,060 in,to 6,000 in, it offers in the form of tables the basic dimensions,and tolerances for a selection of diameter/,pitch combinations. It also provides the method,of calculation for the dimensions and tolerances for,any diameter/pitch combination not given in the,tables, including threads with a diameter in excess of,6,000 in.,NOTE 1 Pending publication of the International Standard,relating to limit gauges referred to in the footnote in,clause 7, special care must be taken to ensure that the,dimensions and tolerances specified in this International,Standard are confirmed by alternative means.,This International Standard applies primarily to the,threads of inch series aerospace fasteners.,2 Definition,For the purposes of this International Standard, the,following definition applies.,2.1 basic profile: The theoretical profile corresponding,to the basic dimensions, i.e. the major diameter,the pitch diameter and the minor diameter. See,figure 1 and clause 3.,The tolerances are applied to the basic profile.,= basic minor diameter of internal thread,d = basic major diameter of external thread,d2 = basic pitch diameter of external thread,dy = basic minor diameter of external thread,H = height of fundamental triangle,P = pitch,n = number of threads per inch,4 Basic profile of thread,4.1 Basic profile dimensions,Values given in table 1 have been calculated according,to the following formulae:,P=-,n,1,n =,〃二也 メP =。,866025尸、 866唔,2 n,且“= 0,48714P = 9'48フ 14,16 n,-H = 0,324 759尸=6324,8 n,= 0,270 63尸=吟。63,旦= 0,10825P = 2^,8 n,3 Symbols,D - basic major diameter of internal thread,D2 = basic pitch diameter of internal thread,4.2 Basic dimensions of thre……
……