1、BRITISH STANDARD BS7724:1994 Specification for Split pins (metricseries)BS7724:1994 This British Standard, having been prepared under the directionof the General Mechanical Engineering Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15 March
2、1994 BSI07-1999 The following BSI references relate to the work on this standard: Committee referenceGME/9 Draft for comment93/701982DC ISBN 0 580 22778 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the General Mechanical Engineering Sta
3、ndards Policy Committee (GME/-) to Technical CommitteeGME/9, upon which the following bodies were represented: BEAMA Ltd. British Constructional Steelwork Association Ltd. British Industrial Fasteners Federation British Steel Industry British Steel Industry (Wire Section) Gauge and Tool Makers Assoc
4、iation Society of Motor Manufacturers and Traders Ltd. Washer Manufacturers Association of Great Britain The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Defence Manufacturers Association General Municipal Boilermaker and Allied Trades Uni
5、on Screw Thread Tool Manufacturers Association Society of British Aerospace Companies Ltd. Amendments issued since publication Amd. No. Date CommentsBS7724:1994 BSI 07-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Normative references 1 3 Dimensions 1 4 Form
6、and tolerance 1 5 Characteristics 1 6 Designation 1 Annex A (informative) Split pin sizing 6 Figure 1 Dimensions of metric split pins 4 Table 1 Dimensions of metric split pins 2 Table 2 Lengths of metric split pins 3 Table 3 Tolerance on length of metric split pins 5 Table 4 Characteristics of metri
7、c split pins 5 Table A.1 Sizes of split pins for bolts and clevis pins 6 List of references Inside back coverBS7724:1994 ii BSI 07-1999 Foreword This British Standard has been prepared under the direction of the General Mechanical Engineering Standards Policy Committee to provide a standard for metr
8、ic split pins. It supersedes the metric requirements in BS1574:1972 which has been revised as an inch series standard only. 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. Compliance
9、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, pagesi andii, pages1to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amend
10、ments incorporated. This will be indicated in the amendment table on the inside front cover.BS7724:1994 BSI 07-1999 1 1 Scope This British Standard specifies the characteristics of ferrous and non-ferrous split pins with metric dimensions and nominal diameter from0.6mm to20mm inclusive. Guidance as
11、to the size of split pins to be fitted to bolts and clevis pins is given in Annex A of this standard. 2 Normative references This British Standard incorporates, by reference, provisions from specific editions of other publications. These normative references are cited at the appropriate points in th
12、e text and the publications are listed on the inside back cover. Subsequent amendments to, or revisions of, any of these publications apply to this standard only when incorporated in it by updating or revision. 3 Dimensions The dimensions and tolerances of metric split pins shall be as given in Tabl
13、e 1 and Table 2 and Figure 1. 4 Form and tolerance The tolerance of the split pin hole shall be H13, in accordance with BS4500-1.1:1990 and BS4500-1.2:1990. The eye of the pin shall approximate to the form shown in Figure 1. The length of the eye shall be the distance from the underside to the extre
14、me outer surface of the eye and shall conform to the dimensions given in Table 1. The closed legs of the shank shall form a circular cross section and be straight and parallel throughout the nominal length. The nominal length of pin shall be the distance of the eye to the extreme end of the short le
15、g, i.e.the straight length of the short leg (see Figure 1). The tolerance on the length of metric split pins shall be as given in Table 3. 5 Characteristics The characteristics of metric split pins shall be as given in Table 4. 6 Designation When designating for the purposes of an enquiry or order,
16、the following information shall be given: a) general product description, i.e.split pin; b) the number of this British Standard, i.e.BS7724:1994; c) the nominal diameter of the product in millimetres; d) the nominal length in millimetres; e) the material, i.e.stainless steel; f) details of the coati
17、ng (if requested) and the relevant British Standard, e.g.BS7371 Example: The designation of a steel split pin of nominal diameter4mm and nominal length36mm is as follows: Split pin BS7724:19944 36 steel BS7724:1994 2 BSI 07-1999 Table 1 Dimensions of metric split pins Dimensions in millimetres Nomin
18、al diameter a d a R b C max. min. max. min. max. max. min. 0.6 0.8 1 1.2 1.6 2 2.5 3.2 4 5 6.3 8 10 13 16 20 0.5 0.7 0.9 1 1.4 1.8 2.3 2.9 3.7 4.6 5.9 7.5 9.5 12.4 15.4 19.3 0.4 0.6 0.8 0.9 1.3 1.7 2.1 2.7 3.5 4.4 5.7 7.3 9.3 12.1 15.1 19 1.6 1.6 1.6 2.5 2.5 2.5 2.5 3.2 4 4 4 4 6.3 6.3 6.3 6.3 0.8 0
19、.8 0.8 1.2 1.2 1.2 1.2 1.6 2.0 2.0 2.0 2.0 3.1 3.1 3.1 3.1 0.05 0.05 0.10 0.10 0.15 0.15 0.20 0.25 0.30 0.40 0.50 0.60 0.70 0.95 1.20 1.50 2 2.4 3 3 3.2 4 5 6.4 8 10 12.6 16 20 26 32 40 1 1.4 1.8 2 2.8 3.6 4.6 5.8 7.4 9.2 11.8 15 19 24.8 30.8 38.6 0.9 1.2 1.6 1.7 2.4 3.2 4 5.1 6.5 8 10.3 13.1 16.6 2
20、1.7 27 33.8 a The nominal diameter is the diameter of the split pin hole.BS7724:1994 BSI 07-1999 3 Table 2 Lengths of metric split pins Dimensions in millimetres Nominal length l Nominal diameter 0.6 0.8 1 1.2 1.6 2 2.5 3.2 4 5 6.3 8 10 13 16 20 4 5 6 8 10 12 14 16 18 20 Range of commercial lengths
21、22 25 28 32 36 40 45 50 56 63 71 80 90 100 112 125 140 160 180 200 224 250 280BS 7724:1994 4 BSI 07-1999 NOTEFor dimensionl see Table 2. Figure 1 Dimension of metric split pinsBS7724:1994 BSI 07-1999 5 Table 3 Tolerance on length of metric split pins Table 4 Characteristics of metric split pins Dime
22、nsions in millimetres Nominal diameter Tolerance of length k 3.2 3.2k 6.3 6.3k 10 10 1.5 2.0 2.5 3.0 Material Ferrous Steel 0.15%Cmax. Maximum UTS620N/mm 2 Stainless steel 0.15%Cmax. 1.00%Simax. 2.00%Mnmax. 0.045%SMax. 0.045%Pmax. 17/20%Crmax. 7/11%Nimax. Maximum UTS620N/mm 2 Non-ferrous Copper Hard
23、 condition for d k 6mm Annealed condition for d6 mm Brass : hard condition for dk10mm Annealed condition for d10mm Surface finish Split pins shall be supplied in natural finish treated with a protective lubricant, unless otherwise specified by agreement between customer and supplier. Workmanship Par
24、ts shall uniform in quality and free of irregularities or detrimental defects. Acceptability The acceptance procedure is covered in BS6587:1985.BS7724:1994 6 BSI 07-1999 Annex A (informative) Split pin sizing Guidance as to the size of split pins to be fitted to bolts and clevis pins is given in Tab
25、le A.1. Table A.1 Sizes of split pins for bolts and clevis pins Dimensions in millimetres Nominal diameter a Corresponding diameters b Bolts Clevis pins over to over to 0.6 0.8 1 1.2 1.6 2 2.5 3.2 4 5 6.3 8 10 13 16 20 2.5 3.5 4.5 5.5 7 9 11 14 20 27 39 56 80 120 170 2.5 3.5 4.5 5.5 7 9 11 14 20 27
26、39 56 80 120 170 2 3 4 5 6 8 9 12 17 23 29 44 69 110 160 2 3 4 5 6 8 9 12 17 23 29 44 69 110 160 a The nominal diameter is the diameter of the split pin hole. b For railway applications and in cases where split pins in clevis pins are subject to alternating transverse forces, it is recommended that
27、the next split pin size larger than that specified is used.BS7724:1994 BSI 07-1999 List of references (see clause2) Normative references BSI standards publications BRITISH STANDARDS INSTITUTION, London BS4500, ISO limits and fits. BS4500-1, General tolerances and deviations. BS4500-1.1:1990, Specifi
28、cation for bases of tolerances, deviations and fits. BS4500-1.2:1990, Tables of commonly used tolerance and grades and limits deviations for holes and shafts. BS6587:1985, Method of acceptance inspection for fasteners. BS7724:1994 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstituti
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