British Standard Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI A single copy of this British Standard is licensed to paul prickett 21 January 2005 This is an uncontrolled copy Ensure use of the most current version of this document by searching British Standards Online at bsonline.techindex.co.uk 标准分享网 www.bzfxw.com 提供免费下载 BRITISH STANDARD BS EN 20286-1:1993 ISO 286-1: 1988 Incorporating Amendment No ISO system of limits and fits — Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI Part 1: Bases of tolerances, deviations and fits The European Standard EN 20286-1:1993 has the status of a British Standard UDC 621.713.1/.2 BS EN 20286-1:1993 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the General Mechanical Engineering Standards Policy Committee (GME/-) to Technical Committee GME/5, upon which the following bodies were represented: Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI BCIRA BEAMA Ltd British Railways Board EBEA (the Electronics and Business Equipment Association) Federation of British Engineers’ Tool Manufacturers Gauge and Tool Makers’ Association Institution of Production Engineers Railway Industry Association of Great Britain Society of British Aerospace Companies Limited Society of Motor Manufacturers and Traders Limited Steel Casting Research and Trade Association Zinc Development Association This British Standard, having been prepared under the direction of the General Mechanical Engineering Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 31 January 1990 © BSI 02-2000 First published as BS 4500-1 July 1969 Second edition as Section 1.1 January 1990 The following BSI references relate to the work on this standard: Committee reference GME/5 Draft for comment 86/74319 DC ISBN 580 18122 Amendments issued since publication Amd No Date of issue Comments 7630 August 1993 Indicated by a sideline in the margin 标准分享网 www.bzfxw.com 提供免费下载 BS EN 20286-1:1993 Contents Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI Page Committees responsible Inside front cover National foreword iii Foreword Introduction Scope Field of application 3 References Terms and definitions Symbols, designation and interpretation of tolerances, deviations and fits 12 Graphical representation 16 Reference temperature 17 Standard tolerances for basic sizes up to 150 mm 17 Fundamental deviations for basic sizes up to 150 mm 18 10 Bibliography 25 Annex A Bases of the ISO system of limits and fits Annex B Examples of the use of ISO 286-1 Annex C Equivalent terms Annex ZA (normative) Normative references to international publications with their relevant European publications Figure — Basic size, and maximum and minimum limits of size Figure — Conventional representation of a tolerance zone Figure — Clearance Figure — Clearance fit Figure — Transition fit Figure — Interference Figure — Interference fit Figure — Schematic representation of clearance fits Figure — Schematic representation of interference fits Figure 10 — Schematic representation of transition fits Figure 11 — Shaft-basis system of fits Figure 12 — Hole-basis system of fits Figure 13 — Schematic representation of the positions of fundamental deviations Figure 14 — Deviations for shafts and holes Figure 15 — Graphical representation Figure 16 — Simplified schematic diagram Figure 17 — Deviations for shafts Figure 18 — Deviations for holes Figure 19 — Deviations js and JS Figure 20 — Diagrammatic representation of the rule given in A.4.2 b) Table — Numerical values of standard tolerance grades IT for basic sizes up to 150 mm Table — Numerical values of the fundamental deviations of shafts Table — Numerical values of the fundamental deviations of holes Table — Basic size steps Table — Numerical values for standard tolerances in grades IT01 and IT0 Table — Formulae for standard tolerances in grades IT01, IT0 and IT1 for basic sizes up to and including 500 mm © BSI 02-2000 26 33 34 41 8 9 10 10 10 11 12 14 15 17 17 18 19 19 31 20 21 23 27 28 28 i BS EN 20286-1:1993 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI Page Table — Formulae for standard tolerances in grades IT1 to IT18 29 Table — Rounding for IT values up to and including standard tolerance grade IT11 30 Table — Formulae for fundamental deviations for shafts and holes 32 Table 10 — Rounding for fundamental deviations 33 Publications referred to Inside back cover ii © BSI 02-2000 标准分享网 www.bzfxw.com 提供免费下载 BS EN 20286-1:1993 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI National foreword This Section of BS 4500 has been prepared under the direction of the General Mechanical Engineering Standards Policy Committee and is identical with ISO 286:1988 “ISO system of limits and fits” Part “Bases of tolerances, deviations and fits”, published by the International Organization for Standardization (ISO) In 1993 the European Committee for Standardization (CEN) accepted ISO 286-1:1988 as European Standard EN 20286-1:1993 As a consequence of implementing the European Standard this British Standard is renumbered as BS EN 20286-1:1993 and any reference to BS 4500-1.1:1990 should be read as a reference to BS EN 20286-1:1993 Together with BS 4500-1.2, it is a revision of BS 4500-1:1969 which is withdrawn The major changes incorporated in this Section of BS 4500 are as follows: a) The presentation of the information has been modified so that the standard can be used directly in both the design office and the workshop This has been achieved by separating the material dealing with the bases of the system, and the calculated values of standard tolerances and fundamental deviations, from the tables giving specific limits of the most commonly used tolerances and deviations, which are now in BS 4500-1.2 b) The new symbols js and JS replace the former symbols Js and Js, i.e s and S are no longer placed as subscripts, to facilitate the use of symbols on equipment with limited character sets, e.g computer graphics The letters “s” and “S” stand for “symmetrical deviation” c) Standards tolerances and fundamental deviations have been included for basic sizes from 500 mm to 150 mm as standard requirements (these were previously included on an experimental basis only) d) Two additional standard tolerance grades, IT17 and IT18, have been included e) Standard tolerance grades IT01 and IT0 have been deleted from the main body of this Part, although information on these grades is given in Annex A for users who may need such grades f) Inch values have been deleted g) The principles, terminology and symbols have been aligned with those required by contemporary technology Cross-references International Standard Corresponding British Standard ISO 286-2:1988 BS 4500 ISO limits and fits Section 1.2:1990 Tables of commonly used tolerance grades and limit deviations for holes and shafts (Identical) BS 308 Engineering drawing practice Part 2:1985 Recommendations for dimensioning and tolerancing of size (Technically equivalent) BS 4500 ISO limits and fits Part 4:1985 Specification for system of cone (taper) fits for cones from C = : to : 500, lengths from mm to 630 mm and diameters up to 500 mm (Identical) ISO 406:1987 ISO 5166:1982 © BSI 02-2000 iii BS EN 20286-1:1993 The Technical Committee has reviewed the provisions of ISO 1:1975 and ISO/R 1938:1971 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 ISO 8015 is BS 308 “Engineering drawing practice”, Part 2:1985 “Recommendations for dimensioning and tolerancing of size” A related British Standard to ISO 1101:1983 is BS 308 “Engineering drawing practice”, Part 3:1972 “Geometrical tolerancing” A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI 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 front cover, pages i to iv, the EN title page, pages to 42, 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 © BSI 02-2000 标准分享网 www.bzfxw.com 提供免费下载 EUROPEAN STANDARD EN 20286-1 NORME EUROPÉENNE April 1993 EUROPÄISCHE NORM UDC 621.713.1/.2 Descriptors: Standard tolerances, fundamental tolerances, fits, definitions, designation, multilingual nomenclature, round shafts, cylindrical bores, dimensions, ratings English version ISO system of limits and fits — Part 1: Bases of tolerances, deviations and fits Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI (ISO 286-1:1988) Système ISO de tolérances et d’ajustements — Partie Base de tolérances, écarts et ajustements (ISO 286-1:1988) ISO-System für Grenzabmaße und Passungen — Teil Grundlagen für Toleranzen, Abmaße und Passungen (ISO 286-1:1988) This European Standard was approved by CEN on 1993-04-15 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1993 Copyright reserved to CEN members Ref No EN 20286-1:1993 E EN 20286-1:1993 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI Foreword In 1991, the International Standard ISO 286-1:1988 ISO system of limits and fits — Part 1: Bases of tolerances, deviations and fits was submitted to the CEN Primary Questionnaire procedure Following the positive result of the CEN/CS Proposal, ISO 286-1:1988 was submitted to the Formal Vote The result of the Formal Vote was positive This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 1993, and conflicting national standards shall be withdrawn at the latest by October 1993 According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom NOTE The European references to international publications are given in Annex ZA (normative) © BSI 02-2000 标准分享网 www.bzfxw.com 提供免费下载 EN 20286-1:1993 Introduction The need for limits and fits for machined workpieces was brought about mainly by the inherent inaccuracy of manufacturing methods, coupled with the fact that “exactness” of size was found to be unnecessary for most workpieces In order that function could be satisfied, it was found sufficient to manufacture a given workpiece so that its size lay within two permissible limits, i.e a tolerance, this being the variation in size acceptable in manufacture Similarly, where a specific fit condition is required between mating workpieces, it is necessary to ascribe an allowance, either positive or negative, to the basic size to achieve the required clearance or interference, i.e a “deviation” With developments in industry and international trade, it became necessary to develop formal systems of limits and fits, firstly at the industrial level, then at the national level and later at the international level This International Standard therefore gives the internationally accepted system of limits and fits Annex A and Annex B give the basic formulae and rules necessary for establishing the system, and examples in the use of the standard are to be regarded as an integral part of the standard Annex C gives a list of equivalent terms used in ISO 286 and other International Standards on tolerances Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI Scope This part of ISO 286 gives the bases of the ISO system of limits and fits together with the calculated values of the standard tolerances and fundamental deviations These values shall be taken as authoritative for the application of the system (see also clause A.1) This part of ISO 286 also gives terms and definitions together with associated symbols Field of application The ISO system of limits and fits provides a system of tolerances and deviations suitable for plain workpieces For simplicity and also because of the importance of cylindrical workpieces of circular section, only these are referred to explicitly It should be clearly understood, however, that the tolerances and deviations given in this International Standard equally apply to workpieces of other than circular section In particular, the general term “hole” or “shaft” can be taken as referring to the space contained by (or containing) the two parallel faces (or tangent planes) of any workpiece, such as the width of a slot or the thickness of a key The system also provides for fits between mating cylindrical features or fits between workpieces having features with parallel faces, such as the fit between a key and keyway, etc NOTE It should be noted that the system is not intended to provide fits for workpieces with features having other than simple geometric forms For the purposes of this part of ISO 286, a simple geometric form consists of a cylindrical surface area or two parallel planes References NOTE See also clause 10 ISO 1, Standard reference temperature for industrial length measurements ISO 286-2, ISO system of limits and fits — Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts ISO/R 1938, ISO system of limits and fits — Inspection of plain workpieces1) ISO 8015, Technical drawings — Fundamental tolerancing principle Terms and definitions For the purposes of this International Standard, the following terms and definitions apply It should be noted, however, that some of the terms are defined in a more restricted sense than in common usage 1) At present under revision © BSI 02-2000 EN 20286-1:1993 Table — Rounding for IT values up to and including standard tolerance grade IT11 Rounding values in micrometres Calculated values obtained from the formulae given in A.3.2 and A.3.3 Above Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI 60 100 200 500 000 000 000 10 000 20 000 Up to and including 60 100 200 500 000 000 000 10 000 20 000 50 000 Basic size Up to 500 mm (incl.) Above 500 mm up to 150 mm (incl.) Rounding in multiples of 1 10 — — — — — — 10 20 50 100 200 500 000 NOTE For the small values in particular, it has sometimes been necessary to depart from these rules, and, in some instances, even from the application of the formulae given in A.3.2 and A.3.3 in order to ensure better scaling Therefore the values given for the standard tolerances in Table and Table 5, as appropriate, shall be used in preference to calculated values when applying the ISO system NOTE Values for standard tolerances in grades IT1 to IT18 are given in Table and for IT0 and IT01 in Table A.4 Derivation of fundamental deviations A.4.1 Fundamental deviations for shafts The fundamental deviations for shafts are calculated from the formulae given in Table The fundamental deviation given by the formulae in Table is, in principle, that corresponding to the limits closest to the zero line, i.e the upper deviation for shafts a to h and the lower deviation for shafts k to zc Except for shafts j and js, for which, strictly speaking, there is no fundamental deviation, the value of the deviation is independent of the selected grade of tolerance (even if the formula includes a term involving ITn) A.4.2 Fundamental deviations for holes The fundamental deviations for holes are calculated from the formulae given in Table and, therefore, the limit corresponding to the fundamental deviation for a hole is exactly symmetrical, in relation to the zero line, to the limit corresponding to the fundamental deviation for a shaft with the same letter This rule applies to all fundamental deviations except for the following: a) deviation N, for standard tolerance grades IT9 to IT16 in basic sizes above mm up to 500 mm (incl.), for which the fundamental deviation is zero; b) shaft or hole basis fits, for basic sizes above up to 500 mm (incl.), in which a hole of a given standard tolerance grade is associated with a shaft of the next finer grade (e.g H7/p6 and P7/h6), and which are required to have exactly the same clearance or interferences, see Figure 20 In these cases, the fundamental deviation, as calculated, is adjusted by algebraically adding the value of ¹ as follows: ES = ES (as calculated) + ¹ where ¹ is the difference ITn – IT(n – 1) between the standard tolerance, for the basic size step in the given grade, and that in the next finer grade Example: For P7 in the basic size range from 18 up to 30 mm: ¹ = IT7 – IT6 = 21 – 13 = 4m NOTE The rule given in b) above is only applicable for basic sizes over mm for fundamental deviations K, M and N in standard tolerance grades up to and including IT8, and deviations P to ZC in standard tolerance grades up to and including IT7 30 © BSI 02-2000 标准分享网 www.bzfxw.com 提供免费下载 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI EN 20286-1:1993 Figure 20 — Diagrammatic representation of the rule given in A.4.2 b) The fundamental deviation given by the formulae in Table is, in principle, that corresponding to the limits closest to the zero line, i.e the lower deviation for holes A to H and the upper deviation for holes K to ZC Except for holes J and JS, for which, strictly speaking, there is no fundamental deviation, the value of the deviation is independent of the selected grade of tolerance (even if the formula includes a term involving ITn) A.4.3 Rounding of values for fundamental deviations For each basic size step, the values obtained from the formulae given in Table are rounded off in accordance with the rules given in Table 10 © BSI 02-2000 31 EN 20286-1:1993 Table — Formulae for fundamental deviations for shafts and holes Basic size mm Shafts Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI Sign Up to Fundamental (negative Above and deviation or including positive) 120 120 500 160 160 500 40 40 500 10 0 a b – – Designation es es Formulaea where D is the geometric mean of the basic size in millimetres 265 + 1,3D 3,5D 140 + 0,85D 1,8D 52D0,2 Basic size mm Holes Designation EI Sign Fundamen Up to (negative tal Above and or deviation including positive) + A EI + B EI + C 120 120 500 160 160 500 40 40 500 c – es cd – es Geometric mean of the values for C, c and D, d EI + CD 10 150 d – es 16D0,44 EI + D 150 150 e – es 11D0,41 EI + E 150 EI + EF 10 10 150 95 + 0,8D ef – es Geometric mean of the values for E, e and F, f f – es 5,5D0,41 EI + F 150 es Geometric mean of the values for F, f and G, g EI + FG 10 10 150 g – es 2,5D0,34 EI + G 150 150 h No sign es Deviation = EI No sign H 150 500 J 500 JS 150 Kd 0 500 500 500 500 150 500c 150 500 150 500 150 500 150 150 fg – No formulab j js k + – + No sign es ei ei m + ei n + ei p + ei r + ei s + ei 0,5 ITn 0,6 D Deviation = IT7 – IT6 0,024D + 12,6 5D0,34 0,04D + 21 IT7 + to 0,072D + 37,8 Geometric mean of the values for P, p and S, s IT8 + to EI ES ES + – – No sign ES – Md ES – Nd ES – pd ES – Rd ES – Sd 50 50 150 24 150 t + ei IT7 + 0,63D ES – 150 u + ei IT7 + D ES 14 500 v + ei IT7 + 1,25D 500 x + ei 18 500 y + 500 z 500 0 500 500e 150 500 500 150 500 500 150 500 500 150 150 50 50 150 Td 24 150 – Ud 150 ES – Vd 14 500 IT7 + 1,6D ES – Xd 500 ei IT7 + 2D ES – yd 18 500 + ei IT7 + 2,5D ES – Zd 500 za + ei IT8 + 3,15D ES – ZAd 500 500 zb + ei IT9 + 4D ES – ZBd 500 500 zc + ei IT10 + 5D ES – ZCd 500 IT7 + 0,4D a Fundamental deviations (i.e results from formulae) in micrometres Values only given in Table and Table c Formula only applies to grades IT4 to IT7 inclusively; fundamental deviation k for all other basic sizes and all other IT grades = d Special rule applies [see A.4.2 b)] e Formula only applies to grades up to IT8 inclusively; fundamental deviation K for all other basic sizes and all other IT grades = b 32 © BSI 02-2000 标准分享网 www.bzfxw.com 提供免费下载 EN 20286-1:1993 Table 10 — Rounding for fundamental deviations Rounding values in micrometres Basic size Calculated values obtained from the formulae given in Table 4m up to 500 mm (incl.) above 500 mm up to 150 mm (incl.) Fundamental deviations Above a to g A to G Up to and including k to zc K to ZC d to u D to U Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI Rounding in multiples of 45 60 100 200 300 500 560 600 800 000 000 20 × 10n 50 × 10n 100 × 10n 45 60 100 200 300 500 560 600 800 000 000 000 50 × 10n 100 × 10n 200 × 10n 5 10 10 10 20 20 20 50 1 2 5 10 20 50 100 1 10 10 20 20 20 20 50 100 × 10n × 10n × 10n Annex B Examples of the use of ISO 286-1 (This annex forms an integral part of the standard.) B.1 General This annex gives examples in the use of the ISO system of limits and fits, in determining the limits for shafts and holes The numerical values of the upper and lower deviations for the more generally used basic size steps, fundamental deviations and tolerance grades have been calculated and are tabulated in ISO 286-2 In special cases, not covered by ISO 286-2, the appropriate upper and lower deviations, and hence the limits of size, can be calculated from the data given in Table to Table 3, and Table to Table in Annex A in this part of ISO 286 B.2 Review of special features A summary of the features and factors which shall be taken into consideration when using this part of ISO 286 to derive upper and lower deviations for special cases is given below: — shafts and holes a, A, b, B are provided only for basic sizes greater than mm; — shafts j8 are provided only for basic sizes less than or equal to mm; — holes K in tolerance grades above IT8 are provided only for basic sizes less than or equal to mm; — shafts and holes t, T, v, V and y, Y are only provided for basic sizes greater than 24 mm, 14 mm and 18 mm, respectively (for smaller basic sizes, the deviations are practically the same as those of the adjacent tolerance grades); — tolerance grades IT14 to IT18 are only provided for basic sizes greater than mm; — holes N of tolerance grades above IT8 are only provided for basic sizes greater than mm © BSI 02-2000 33 EN 20286-1:1993 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI B.3 Examples B.3.1 Determining the limits of size for a shaft ø 40g11 Basic size step: 30 to 50 mm (from Table 4) Standard tolerance = 160 4m (from Table 1) Fundamental deviation = – 4m (from Table 2) Upper deviation = fundamental deviation = – 4m Lower deviation = fundamental deviation – tolerance = – – 160 4m = – 169 4m Limits of size: Maximum = 40 – 0,009 = 39,991 mm Minimum = 40 – 0,169 = 39,831 mm B.3.2 Determining the limits of size for a hole ø 130N4 Basic size step: 120 to 180 mm (from Table 4) Standard tolerance = 12 4m (from Table 1) Fundamental deviation = – 27 + ¹ 4m (from Table 3) Value of ¹ = 4m (from Table 3) Upper deviation = fundamental deviation = – 27 + = – 23 4m Lower deviation = fundamental deviation – tolerance = – 23 – 12 4m = – 35 4m Limits of size: Maximum = 130 – 0,023 = 129,977 mm Minimum = 130 – 0,035 = 129,965 mm Annex C Equivalent terms (This annex does not form an integral part of the standard.) C.1 General This annex establishes a list of terms used in ISO 286 (and in other International Standards on tolerances) NOTE In addition to terms used in the three official ISO languages (English, French and Russian), the equivalent terms in German, Spanish, Italian, Swedish and Japanese are also given These have been included at the request of Technical Committee ISO/TC and are published under the responsibility of the member bodies for Germany, F.R (DIN), Spain (AENOR), Italy (UNI), Sweden (SIS) and Japan (JISC) C.2 Notes on presentation The numerals 01 to 90 give the alphabetical order for the first language (i.e English) only (for reference) The column “Reference clause” refers to the number of the clause, sub-clause, etc in which the term is defined (or the most important place) in this part of ISO 286 The words given in “parentheses” indicate that the part of the term placed between them may be omitted Synonyms have been separated by a semi-colon Square brackets indicate that the word(s) placed between them may replace all or some of the preceding words Short explanations as regards the term have been presented in note form C.3 Recommendations for the user It is recommended that the users, for convenience, re-arrange the vocabulary alphabetically in their own languages and number them accordingly on the left-hand side of the table 34 © BSI 02-2000 © BSI 02-2000 EN 20286-1:1993 35 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI 标准分享网 www.bzfxw.com 提供免费下载 © BSI 02-2000 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI EN 20286-1:1993 36 © BSI 02-2000 EN 20286-1:1993 37 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI 标准分享网 www.bzfxw.com 提供免费下载 © BSI 02-2000 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI EN 20286-1:1993 38 © BSI 02-2000 EN 20286-1:1993 39 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI 标准分享网 www.bzfxw.com 提供免费下载 © BSI 02-2000 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI EN 20286-1:1993 40 标准分享网 www.bzfxw.com 提供免费下载 EN 20286-1:1993 Annex ZA (normative) Normative references to international publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to applies (including amendments) Publication Title ISO ISO 286-2 Standard reference temperature for industrial length measurements ISO system of limits and fits — Part 2: Tables of standard tolerances grades and limit deviations for holes and shafts ISO system of limits and fits — Part II: Inspection of plain workpiecesa Technical drawings — Fundamental tolerancing principle ISO/R 1938 ISO 8015 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI a EN/HD EN 20286-2 In revision © BSI 02-2000 41 Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI 42 blank 标准分享网 www.bzfxw.com 提供免费下载 BS EN 20286-1:1993 Publications referred to Licensed Copy: paul prickett, Rover Group, 21 January 2005, Uncontrolled Copy, (c) BSI See national foreword © BSI 02-2000 BS EN 20286-1:1993 ISO 286-1: 1988 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or revision Users of British Standards should 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