1、BRITISH STANDARD BS 1804-1: 1966 Incorporating Amendment No. 2 Specification for Parallel steel dowel pins Part 1: Inch Series UDC 621.886:389.152BS1804-1:1966 This British Standard, having been approved by the MechanicalEngineering IndustryStandards Committee and endorsed by the Chairman ofthe Engi
2、neering Divisional Council, was published under theauthority of the General Council on 26th August, 1966 BSI 07-1999 First published, November, 1951 First revision, published asPart1,August, 1966 The following BSI references relate to the work on this standard: Committee reference MEE/117 Draft for
3、comment D64/1572 ISBN 0 580 35084 3 Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Assoc
4、iated Offices Technical Committee Institution of Heating and Ventilating Association of Consulting Engineers Engineers Association of Mining Electrical and Institution of Mechanical Engineers* Mechanical Engineers Institution of Mechanical Engineers Board of Trade (Automobile Division) British Chemi
5、cal Plant Manufacturers Institution of Production Engineers Association Locomotive and Allied Manufacturers British Compressed Air Society Association of Great Britain British Electrical and Allied Manufacturers London Transport Board Association Machine Tool Trades Association British Gear Manufact
6、urers Association Ministry of Defence, Army Department British Internal Combustion Engine Ministry of Defence, Navy Department Manufacturers Association Ministry of Labour (H.M. Factory Inspectorate) British Iron and Steel Federation Ministry of Power British Mechanical Engineering Federation Minist
7、ry of Public Building and Works Crown Agents for Oversea Governments and Ministry of Technology National Administrations Engineering Laboratory Electricity Council, the Generating Board and Ministry of Transport the Area Boards in England and Wales National Coal Board Engineering Equipment Users Ass
8、ociation National Physical Laboratory (Ministry of Gas Council Technology) Institute of Marine Engineers Radio Industry Council Institution of Civil Engineers Royal Institute of British Architects Institution of Gas Engineers The industrial organization marked with an asterisk in the above list, tog
9、ether with the following, were directly represented on the committee entrusted with the preparation of this British Standard: British Plastics Federation Taper Pin Manufacturers Association Gauge and Toolmakers Association Individual manufacturers Society of British Aerospace Companies Ltd. Amendmen
10、ts issued since publication Amd. No. Date Comments 96 September 1968 4124 November 1982 Indicated by a sideline in the marginBS1804-1:1966 BSI 07-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Material 1 4 Hardness 1 5 Dowel pins in blind h
11、oles 2 6 Dimensions 2 7 Limits of tolerance on dimensions 2 8 Surface texture 2 9 Chamfer 2 10 Anti-corrosion treatment 3 11 Marking 3 Appendix A Fitting dowel pins into blind holes 6 Appendix B Tables for conversion of inches to approximatemillimetreequivalents 6 Figure 1 Method for releasing trapp
12、ed air 6 Table 1 Limits of tolerance on diameter 2 Table 2 Limits of tolerance on length 2 Table 3 Dimensions of parallel steel dowel pins 4BS1804-1:1966 ii BSI 07-1999 Foreword This standard makes reference to the following British Standards: BS 427, Method for Vickers hardness test Part 1: Testing
13、 of metals. BS 860, Table of approximate comparison of hardness scales. BS 970, Wrought steels in the form of bars, billets and forgings, up to6 in ruling section for automobile and general engineering purposes. En series. BS 1133, Packaging code Section 6: Temporary prevention of corrosion (duringt
14、ransportation and storage). BS 1134, Centre-line-average-height method for the assessment of surface texture. BS 1407, High carbon bright steel (silver steel). BS 1423, High carbon oil-hardening steel (precision finish). This British Standard, which was first published in1951, has been revised under
15、 the authority of the Mechanical Engineering Industry Standards Committee. Changes have been made to the range of stock sizes in order to correspond with present-day demands. Also, recognizing that the precision ground parallel dowel pins are sometimes used in applications where the cylindrical surf
16、ace of the pin has a functional duty, surface texture is subjected to numerical control, thus bringing considerably closer definition to the term “precision ground”. The term “dowel pin”, though widely used throughout industry has, so far, had no common meaning. Not only has the use of the term vari
17、ed with industries but sometimes in the same industry its use has varied with the locality. On the one hand different terms have been used for pins of the same type, while on the other the same term has been applied to pins of differing types. For these reasons distinctions have been drawn by defini
18、ng “precision ground parallel dowel pin” and “ground parallel dowel pin”. Dowel pins are normally used to locate two or more components to a required degree of accuracy. In order to provide for varying degrees of accuracy four grades have been standardized. Attention is specially called to the dange
19、r which may arise when fitting dowel pins into blind holes. A suggestion for preventing this danger is made in an appendix. Part 2 of this standard deals with metric series parallel steel dowel pins. Obsolescent (by Amendment No.2). The need for the product covered by this British Standard has been
20、reviewed and it has been decided that, in the interests of rationalization, it should be regarded as obsolescent and not therefore used for new designs. The standard will be withdrawn in due course. A British Standard does not purport to include all the necessary provisions of a contract. Users of B
21、ritish Standards are responsible for their correct application. 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 and ii, pages1to7and a back cover. This standard has be
22、en updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS1804-1:1966 BSI 07-1999 1 1 Scope This British Standard relates to cylindrical parallel steel dowel pins used normally for the accurate location of comp
23、onents relative to each other. Four grades are included: 2 Definitions For the purposes of this British Standard, the following definitions apply: 2.1 dowel pin the generic term which refers to all types of parallel locating pins, as defined in2.2, 2.3 and2.4 2.2 precision ground parallel dowel pin
24、a Grade I steel dowel pin having a ground finish and a total diametral tolerance of0.0002 inch 2.3 ground parallel dowel pin a Grade II steel dowel pin having a ground finish and a total diametral tolerance of0.0005 inch 2.4 parallel dowel pin a Grade III or Grade IV steel dowel pin having a machine
25、d, bright rolled or drawn finish, and a total diametral tolerance wider than that specified for Grades I and II 3 Material Dowel pins shall be manufactured from steels as follows: 3.1 Grades I and II steel dowel pins. From low carbon steel having an analysis conforming to BS970 1) En32 A or En32 B,
26、or from high carbon steel conforming to either BS1407 2)or BS1423 3) . 3.2 Grades III and IV steel dowel pins. From free-cutting steel conforming to BS970 1)En 1 A. By arrangement between purchaser and manufacturer, other steels conforming to BS970 1)may be used as alternatives to those given above.
27、 4 Hardness The dowel pins shall be supplied in accordance with the following requirements: 4.1 Grade I steel dowel pins: Dowel pins manufactured from steel to BS970 1)En32 A and B shall conform to the following requirements for hardness: below 1 / 8in diameter: unhardened; 1 / 8in diameter and abov
28、e: hardened to a minimum of750 HV30 (BS427 4) ). Dowel pins manufactured from steels conforming to BS1407 2)and BS1423 3)shall have a hardness within the range600 to700 HV30 (BS427 4) ). The values on other hardness scales may be used in accordance with BS860 5) . 4.2 Grades II, III and IV steel dow
29、el pins. The dowel pins shall be supplied in the unhardened condition except when otherwise agreed between purchaser and manufacturer. Grade I Precision ground parallel dowel pins; Grade II Ground parallel dowel pins; Grades III and IV Parallel dowel pins with progressively wider limits of tolerance
30、. 1) BS970, “Wrought steels. En series”. 2) BS1407, “High carbon bright steel (silver steel)”. 3) BS1423, “High carbon oil-hardening steel (precision finish)”. 4) BS427, “Method for Vickers hardness test”, Part1, “Testing of metals”. 5) BS860, “Table of approximate comparison of hardness scales”.BS1
31、804-1:1966 2 BSI 07-1999 4.3 Alternative steels. When steels other than the standard range are used (see Clause3) the hardness shall be as agreed between purchaser and manufacturer. 5 Dowel pins in blind holes In the case of dowel pins having an interference fit and intended for application to “blin
32、d” holes, it is important that provision should be made for the release of air (seeAppendix A). The purchaser should state if this feature is required. 6 Dimensions The range of diameters and lengths in which the various grades of dowel pins shall be available as standard are given inTable 3. 7 Limi
33、ts of tolerance on dimensions Limits of tolerance shall be in accordance with the following requirements: 7.1 Diameter. The total tolerance on the diameter shall vary with the pin and shall be as given inTable 1. Table 1 Limits of tolerance on diameter 7.2 Length. The limits of tolerance on the over
34、all length of all grades of dowel pins shall be as given inTable 2. Table 2 Limits of tolerance on length 8 Surface texture When assessed in accordance with BS1134 6) , the roughness of the cylindrical surface of GradesI andII steel dowel pins shall be not greater than16CLA. 9 Chamfer Each pin shall
35、 have a circumferential chamfer of20 to40 on one end, for the purpose of providing a lead; the chamfer shall be visible all round the circumference. The other end may be similarly chamfered or alternatively domed at the discretion of the manufacturer. The depth of the chamfer shall comply with the p
36、rovisions ofTable 3, Column6 7) . Grade Total tolerance Disposition of tolerance in in I 0.000 2 +0.0001 to+0.0003 II 0.0005 +0.00025 to 0.00025 III 0.001 +0.0005 to 0.0005 IV (for pins up to and including 5 / 8in diameter) 0.002 Nominal diameter 0.002 IV (for pins above 5 / 8in diameter) 0.003 Nomi
37、nal diameter 0.003 Nominal overall length of pin, L Limits of tolerance in in Up to and including 2 Nominal length L 0.020 Over 2 Nominal length L 0.030 6) BS1134, “Centre-line average height method for the assessment of surface texture”. 7) BS1133, “Packaging code”, Section6, “Temporary prevention
38、of corrosion of metal surfaces (during transportation and storage).”BS1804-1:1966 BSI 07-1999 3 10 Anti-corrosion treatment The dowel pins shall be given suitable anti-corrosion treatment in accordance with BS1133, Section6 7) . 11 Marking Each package or lot of dowel pins shall bear the manufacture
39、rs name or trade mark, the number of this British Standard and the grade of dowel pin, e.g.BS1804-1, Grade I. NOTEThe markBS1804-1 on or in relation to the product is a claim by the manufacturer that it complies with the requirements of the standard. The British Standards Institution is the owner of
40、 a registered certification trade mark. This is shown below, enclosed in the words, “Approved to British Standard”. This mark can be used only by manufacturers licensed under the certification mark scheme operated by the BSI. The presence of this mark on or in relation to a product is an assurance t
41、hat the goods have been produced to comply with the requirements of the British Standard under a system of supervision, control and testing operated during manufacture and including periodical inspection at the manufacturers works in accordance with the certification mark scheme of the BSI.BS 1804-1
42、:1966 4 BSI 07-1999 Table 3 Dimensions of parallel steel dowel pins 1 2 3 4 5 6 7 Nom. dia. D Grade Actual diameter Nominal length L Depth of chamfer. C Max. Grade Minimum Maximum 1 / 4 3 / 8 1 / 2 5 / 8 3 / 4 7 / 8 1 1 1 / 8 1 1 / 4 1 3 / 8 1 1 / 2 1 3 / 4 2 2 1 / 4 2 1 / 2 2 3 / 4 3 3 1 / 2 4 1 /
43、16 I 0.0626 0.0628 0 0 0 I II 0.020 II III III IV IV 1 / 8 I 0.1251 0.1253 0 0 0 0 0 0 0 0 0 0 I II 0.12475 0.12525 0 0 0 0 0 0 0 0 0 0 0.020 II III III IV IV 3 / 16 I 0.1876 0.1878 0 0 0 0 0 0 0 0 0 0 0 0 I III 0.18725 0.18775 0 0 0 0 0 0 0 0 0 0 0 0 0.030 II III III IV IV 1 / 4 I 0.2501 0.2503 0 0
44、 0 0 0 0 0 0 0 0 0 0 I II 0.24975 0.25025 0 0 0 0 0 0 0 0 0 0 0 0 0.030 II III 0.2495 0.2505 0 0 0 0 0 0 0 0 0 III IV 0.2480 0.2500 0 0 0 0 0 0 0 0 0 IVBS 1804-1:1966 BSI 07-1999 5 Table 3 Dimensions of parallel steel dowel pins 1 2 3 4 5 6 7 Nom. dia. D Grade Actual diameter Nominal length L Depth
45、of chamfer. C Max. Grade Minimum Maximum 1 / 4 3 / 8 1 / 2 5 / 8 3 / 4 7 / 8 1 1 1 / 8 1 1 / 4 1 3 / 8 1 1 / 2 1 3 / 4 2 2 1 / 4 2 1 / 2 2 3 / 4 3 3 1 / 2 4 5 / 16 I 0.3126 0.3128 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 I II 0.31225 0.31275 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.040 II III 0.3120 0.3130 0 0 0 0 0 0
46、0 0 0 0 0 III IV 0.3105 0.3125 0 0 0 0 0 0 0 0 0 0 0 IV 3 / 8 I 0.3751 0.3753 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 I II 0.37475 0.37525 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.040 II III 0.3745 0.3755 0 0 0 0 0 0 0 0 0 0 0 0 III IV 0.3730 0.3750 0 0 0 0 0 0 0 0 0 0 0 0 IV 7 / 16 I 0.4376 0.4378 0 0 0 0 0 0 0 0
47、 0 0 0 0 0 I II 0.43725 0.43775 0 0 0 0 0 0 0 0 0 0 0 0 0 0.040 II III 0.4370 0.4380 0 0 0 0 0 0 0 0 0 0 0 0 III IV 0.4355 0.4375 0 0 0 0 0 0 0 0 0 0 0 0 IV 1 / 2 I 0.5001 0.5003 0 0 0 0 0 0 0 0 0 0 0 0 0 I II 0.49975 0.50025 0 0 0 0 0 0 0 0 0 0 0 0 0 0.040 II III 0.4995 0.5005 0 0 0 0 0 0 0 0 0 0 0
48、 0 III IV 0.4980 0.5000 0 0 0 0 0 0 0 0 0 0 0 0 IV 5 / 8 I 0.6251 0.6253 0 0 0 0 0 0 0 I II 0.62475 0.62525 0 0 0 0 0 0 0 0.060 II III 0.6245 0.6255 0 0 0 0 0 0 0 0 0 0 0 III IV 0.6230 0.6250 0 0 0 0 0 0 0 0 0 0 0 IV 3 / 4 I 0.7501 0.7503 0 0 0 0 0 0 0 I II 0.74975 0.75025 0 0 0 0 0 0 0 0.060 II III
49、 0.7495 0.7505 0 0 0 0 0 0 0 0 0 0 0 III IV 0.7470 0.7500 0 0 0 0 0 0 0 0 0 0 0 IV 7 / 8 I 0.8751 0.8753 0 0 0 0 0 0 0 I II 0.87475 0.87525 0 0 0 0 0 0 0 0.060 II III 0.8745 0.8755 0 0 0 0 0 0 0 0 0 0 III IV 0.8720 0.8750 0 0 0 0 0 0 0 0 0 0 IV 1 I 1.0001 1.0003 0 0 0 0 0 I II 0.99975 1.00025 0 0 0 0 0 0.060 II III 0.9995 1.0005 0 0 0 0 0 0 0 0 III IV 0.9970 1.0000 0 0 0 0 0 0 0 0 IV Nominal length L 1 / 4 3 / 8 1 / 2 5 / 8 3 / 4 7 / 8 1 1 1 / 8 1 1 / 4 1 3 / 8 1 1 / 2 1 3 / 4 2 2 1 / 4 2 1 / 2 2 3 / 4 3 2 1 / 2 4BS1804-1:1966 6
