1、BRITISH STANDARD CONFIRMED JANUARY 1990 BS 4464:1969 Incorporating Amendment No. 1 Specification for Spring washers for general engineering and automobile purposes Metric series UDC 621.882.449BS 4464:1969 This British Standard, having been approved by the Mechanical Engineering IndustryStandards Co
2、mmittee, waspublished underthe authorityof the Executive Boardon 19th May, 1969 BSI 04-1999 The following BSI references relate to the work on this standard: Committee reference MEE/134 Draft for comment 68/22810 ISBN 580 05289 3 Co-operating organizations The Mechanical Engineering Industry Standar
3、ds Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: The Government departments and scientific and industrial organizations marked with an asterisk in the above lis
4、t, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Associated Offices Technical Committee Institute of Marine Engineers Association of Consulting Engineers Institution of Civil Engineers Association of Mining Electrical
5、 and Institution of Gas Engineers Mechanical Engineers Institution of Heating and Ventilating Board of Trade Engineers British Chemical Plant Manufacturers Institution of Mechanical Engineers* Association Institution of Mechanical Engineers British Compressed Air Society (Automobile Division) Britis
6、h Electrical and Allied Manufacturers Institution of Production Engineers Association* Locomotive and Allied Manufacturers British Gear Manufacturers Association Association of Great Britain British Internal Combustion Engine London Transport Board Manufacturers Association Machine Tool Trades Assoc
7、iation British Mechanical Engineering Ministry of Defence* Confederation* Ministry of Defence, Army Department British Pump Manufacturers Association Ministry of Power British Steel Industry Ministry of Public Building and Works Crown Agents for Oversea Governments and Ministry of Technology* Admini
8、strations Ministry of Technology National Department of Employment and Productivity Engineering Laboratory (H.M. Factory Inspectorate) Ministry of Transport Electricity Council, the Central Electricity National Coal Board Generating Board and the Area Boards in National Physical Laboratory England a
9、nd Wales (Ministry of Technology) Engineering Equipment Users Association Royal Institute of British Architects Gas Council Institute of Iron and Steel Wire Manufacturers Spring Research Association Institution of Mechanical Engineers Telecommunication Engineering and Radio and Electronic Component
10、Manufacturing Association Manufacturers Federation Society of Motor Manufacturers and Traders Ltd. Amendments issued since publication Amd. No. Date Comments 4308 October 1983 Indicated by a sideline in the marginBS 4464:1969 BS 04-1999 i Contents Page Co-operating organizations Inside front cover F
11、oreword ii 1 Scope 1 2 Material and mechanical properties 1 3 Finish 1 4 Coating 1 5 Shape 1 6 Ends 2 7 Tangling 2 8 Cranking 2 9 Dimensions 2 10 Functional tests 2 11 Quality control 3 12 Designation for enquiry, ordering and identification purposes 3 13 Identification marking 3 Appendix A BSI poli
12、cy statement on screw threads and the metric system 10 Appendix B Related British Standards 10 Figure 1 Twist test 2 Table 1 Single coil square section spring washers Metric series (Type A) 4 Table 2 Single coil rectangular section spring washers Metric series (Types B and BP) 6 Table 3 Double coil
13、rectangular section spring washer Metric series (Type D) 8BS 4464:1969 ii BS 04-1999 Foreword A complete list of British Standards, numbering over 9,000, fully indexed and with a note of the contents of each, will be found in the BSI Catalogue which may be purchased from BSI Sales Department. The Ca
14、talogue may be consulted in many public libraries and similar institutions. This standard makes reference to the following British Standards: BS 21, Pipe threads. BS 427, Method for Vickers hardness test. BS 860, Tables for comparison of hardness scales. BS 970, Wrought steels in the form of bars, b
15、illets and forgings up to 6 in, ruling section for automobile and general engineering purposes. En series. BS 1449, Steel plate, sheet and strip. BS 1580, Unified screw threads. BS 1706, Electroplated coatings of cadmium and zinc on iron and steel. BS 1802, Steel spring washers for general engineeri
16、ng and automobile purposes. BS 2061, Phosphor bronze spring washers for general engineering purposes. BS 2870, Rolled copper and copper alloys. Sheet, strip and foil. BS 2873, Copper and copper alloys. Wire. BS 3643, ISO metric screw threads. BS 9001, Sampling procedures and tables for inspection by
17、 attributes for electronic parts of assessed quality. This British Standard Specification has been prepared under the authority of the Mechanical Engineering Industry Standards Committee as a result of the decision taken to adopt the ISO metric screw thread system in the United Kingdom (seeAppendix
18、A), and requests received from industry for the provision of a standard for metric series spring washers for general engineering and automobile purposes. Although at present there are no ISO Recommendations or draft Recommendations relating specifically to spring washers, account has been taken of c
19、urrent documentation being considered by ISO Committee ISO/TC2, “Bolts, nuts and accessories”, and the following metric standards: German Standard DIN 127, “Spring washers” (rectangular section). German Standard DIN 7980, “Lock washers for fillister head cap screws” (square section). Indian Standard
20、 IS:3063, “Spring washers for bolts, nuts and screws”. A rationalized selection of ISO metric nominal sizes have been included in this specification, for use where appropriate with products manufactured to the metric threaded fastener standards listed inAppendix B. The tolerances adapted in this spe
21、cification are similar to those utilized in the above-mentioned German Standards, with the exception of the limiting dimensions for the inside diameter (d 1 ). Concern has been expressed in British industry on the danger of spring washer failure due to “opening-out” under load, when the clearance be
22、tween the inside diameter of the washer and the nominal thread size is too great. Accordingly it was decided to reduce the limiting dimensions and tolerances for the inside diameter compared with those quoted in the specifications listed above. Account has also been taken of the current British Stan
23、dards (BS1802 1)and BS2061 2) ), which deal with inch series products, and it was decided in this case to prepare a single specification covering mainly the dimensional and functional aspects of metric series spring washers, rather than a series of separate specifications differing only with regard
24、to material requirements. 1) BS1802, “Steel spring washers for general engineering and automobile purposes”. 2) BS 2061, “Phosphor bronze spring washers for general engineering purposes”.BS 4464:1969 BS 04-1999 iii Spring washers are nowadays manufactured in a variety of materials and although recom
25、mendations with regard to the more commonly used spring steels and copper alloys have been included in this standard, the specification of the material requirements shall be the subject of agreement between the manufacturer and the purchaser. Although spring washer “Type Designations” A, B and D, pr
26、eviously used in BS1802 3)and BS2061 4) , have been included in this specification, the single coil girder section spring washer (Type C) has not been retained. A new “type designation” (Type BP) has been introduced, which has a single coil rectangular section, with deflected ends. This new type is
27、extensively used on the continent, whereas there does not appear to be any metric standard covering girder section washers, or the double coil rectangular section (Type D). In the case of Type D, however, it was agreed to establish a metric series, due mainly to the usefulness of double coil washers
28、 as an anti-rattle device for applications involving light alloys. 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 with a British Standard does not of itself confer immunit
29、y from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages1to 10 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 ins
30、ide front cover. 3) BS1802, “Steel spring washers for general engineering and automobile purposes”. 4) BS 2061, “Phosphor bronze spring washers for general engineering purposes”.iv blankBS 4464:1969 BS 04-1999 1 1 Scope This British Standard specifies the dimensions, tolerances and general requireme
31、nts for metric series spring washers of helical construction, suitable for use with metric threaded fasteners within the range 1.6mm (M1.6) to 68mm (M68) diameter. Dimensions and tolerances are specified for the following types: NOTEWashers supplied in accordance with this specification are for use
32、with right-hand threads, unless otherwise specified by the purchaser (see Clause12). 2 Material and mechanical properties 2.1 The material to be used for the manufacture of spring washers to this specification shall be subject to agreement between the manufacturer and the purchaser and be in accorda
33、nce with the appropriate British Standard specification for material. 2.1.1 Steel spring washers. For steel spring washers it is recommended that a material from the En42 range be selected, as specified in BS970 5) , or BS1449 6) . Hardened and tempered steel spring washers shall possess a hardness
34、within the range HV440 to550 when tested in accordance with the provisions of BS427 7) . NOTEAlternatively the equivalent hardness figures for other approved scales may be used, see BS860, “Tables for comparison of hardness scales”. 2.1.2 Phosphor bronze spring washers. For phosphor bronze spring wa
35、shers it is recommended that materials PB 102 or PB 103 be selected, as specified in BS 2870 8)or BS 2873 9) . PB102 and PB103 shall be in the hard tempered (H) condition and have mechanical properties in accordance with BS 2870 8)and BS 2873 9) . 2.1.3 Copper silicon spring washers. For copper sili
36、con spring washers it is recommended that material CS101 be selected as specified in BS2870 8)or BS 2873 9) . The material CS 101 shall be in the hard tempered condition (H) and have a minimum tensile strength of 700 MN/m 2(70 hbar). 2.1.4 Copper beryllium spring washers. For copper beryllium spring
37、 washers it is recommended that material CB101 be selected as specified in BS2870 8)or BS 2873 9) . The material CB 101 shall be in the hard tempered W (H) condition and after heat treatment shall have the mechanical properties for the W (H)P condition as specified in BS 2870 8)and BS 2873 9) . 3 Fi
38、nish Unless otherwise specified spring washers complying with this British Standard shall be of a natural “self-colour” finish and free from scale and burrs. 4 Coating 4.1 If the washers are required to have a protective or decorative finish, this shall be specified by the purchaser in his enquiry o
39、r order and reference shall be made to any appropriate British Standard. NOTEThe purchaser should give details of the thickness of plating required in accordance with the provisions of the appropriate British Standard, e.g. state BS classification number for cadmium or zinc plating to BS1706 10) . 4
40、.2 The springiness of the washers shall not be impaired by any protective coating and where necessary any hydrogen embrittlement shall be removed (see BS 1706:1960 10) , Appendix H). 5 Shape The spring washers shall be evenly wound with uniform pitch and during use the washers shall remain circular
41、and their section shall be such as not to cause them to spread when set down by a nut, under normal service conditions. NOTEThe dimensions given inTable 1, Table 2 and Table 3 are based on the use of standard square and rectangular wire sections. After coiling these produce washers of trapezoidal se
42、ction with the inner periphery thicker than the outer, but with the limiting dimensions in accordance with the dimensions given in the appropriate tables. Type A. Single coil square section Table 1 Type B. Single coil rectangular section (with normal ends) Table 2 Type BP. Single coil rectangular se
43、ction (with deflected ends) Type D. Double coil rectangular section Table 3 5) BS 970, “Wrought steels. En series”. 6) BS 1449, “Steel plate, sheet and strip”. 7) BS 427, “Method for Vickers hardness test”. 8) BS 2870, “Rolled copper and copper alloys. Sheet, strip and foil”. 9) BS 2873, “Copper and
44、 copper alloys. Wire”. 10) BS 1706, “Electroplated coatings of cadmium and zinc on iron and steel”.BS 4464:1969 2 BS 04-1999 6 Ends The ends of washers shall not abut when the washer is in the closed condition. 7 Tangling Single coil washers having a sectional thickness greater than1.6mm shall be pr
45、oduced so that they shall not be liable to tangle or link together when in the free condition. 8 Cranking Double coil washers shall be cranked so that the washer lies flat when closed under compression. 9 Dimensions The dimensions of spring washers complying with this standard shall be in accordance
46、 withTable 1, Table 2 and Table 3 in the uncoated condition. 10 Functional tests 10.1 Spring washers complying with this standard shall show no cracks, imperfections or fractures after being subjected to the functional tests in10.2, 10.3 and10.4. 10.2 Closing and test for permanent set 10.2.1 Single
47、 coil washers. Sample washers shall be selected at random and completely closed. On release of the pressure the free height of each washer shall be as follows. 1) For steel spring washers and copper beryllium spring washers, not less than1.66times its sectional thickness. 2) For phosphor bronze spri
48、ng washers and copper silicon spring washers, not less than1.3times its sectional thickness. This application and removal of pressure shall then be repeated twenty times in quick succession, after which the free height shall not have been further reduced. 10.2.2 Double coil washers. Sample washers s
49、hall be selected at random and completely closed. On release of the pressure the free height of each washer shall be as follows. 1) For steel spring washers and copper beryllium spring washers, not less than three times its sectional thickness. 2) For phosphor bronze spring washers and copper silicon spring washers, not less than twice its sectional thickness. This application and removal of pressure shall then be repeated twenty times in quick succession, after which the free height shall not have been further reduced. 10.3 Twist test. A po
