BS-7568-4-1992 ISO-10243-1991.pdf

BRITISH STANDARD BS 7568-4: 1992 ISO 10243: 1991 Press tools Part 4: Compression springs with rectangular section Housing dimensions and colour coding Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 This British Standard, having been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 1 May 1992 © BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference MTE/12 Draft for comment 90/74313 DC ISBN 0 580 20720 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Machine, Engineers and Hand Tools Standards Policy Committee (MTE/-) to Technical Committee MTE/12, upon which the following bodies were represented: Advanced Manufacturing Technology Research Institute Gauge and Tool Makers Association Amalgamated Engineering Union Coopted member Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 © BSI 11-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Technical specifications1 2.1Tolerances for the free length, Lo1 2.2Spring rate light1 2.3Spring rate medium5 2.4Spring rate strong9 2.5Spring rate extra strong13 3Designation17 Figure 11 Table 11 Table 22 Table 36 Table 410 Table 514 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 ii © BSI 11-1999 National foreword This Part of BS 7568 has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Policy Committee. It is identical with ISO 10243:1991 “Tools for pressing Compression springs with rectangular section Housing dimensions and colour coding”, prepared by Technical Committee ISO/TC 29, Small Tools, and published by the International Organization for Standardization (ISO). 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 immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 17 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. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 © BSI 11-19991 1 Scope This International Standard sets out the technical specifications for compression springs made from rectangular wires. The spring parameters apply to springs that are set. It does not attempt to specify the quality of the springs themselves, nor all of their dimensions (e.g. cross-section), their material, or their length of life. The springs are classified into the spring rates: light, medium, strong, and extra strong. For each spring rate this International Standard gives a colour code. 2 Technical specifications See Figure 1 and 2.1 to 2.5. 2.1 Tolerances for the free length, Lo See Figure 1 and Table 1. Table 1 2.2 Spring rate light Colour code: Green See Figure 1 and Table 2. Figure 1 Lo Tolerance mm% 25 32 38 44 51 64 ± 3 76 89 102 115 ± 2,5 127 139 152 178 203 254 305 ± 2 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 2 © BSI 11-1999 Table 2 Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 251010,3 328,513,1 386,815,6 10544618 51520,9 644,326 763,231,2 3051,1125 2517,910,3 3216,413,1 3813,615,6 4412,118 12,56,35111,420,9 649,326,3 767,131,2 895,436,5 3051,4125 2523,410,3 3222,913,1 3819,315,6 4417,118 1685115,720,9 6410,726,3 761031,2 898,636,5 1027,841,8 3052,5125 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 © BSI 11-19993 Table 2 Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 2555,810,2 324512,5 3833,315 443018 5124,520 642025 2010761630 891435 1021241 11510,946 1279,551 1398,456 1527,561 3054122 2510010,2 3280,312,5 386215 4452,918 514420 6435,225 762830 2512,5892435 10221,141 11518,746 12716,751 13915,356 1521461 17812,571 20310,481 3057122 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 4 © BSI 11-1999 Table 2 Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 389415 4479,518 516720 645325 764430 8937,235 1023241 32161152946 1272551 1392356 15221,561 17818,271 20315,881 25412,5102 30510,3122 519220 647325 766330 895135 1024341 11539,646 40201273751 1393256 1522861 17825,271 20322,781 25417102 30514,8122 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 © BSI 11-19995 Table 2 2.3 Spring rate medium Colour code: Blue See Figure 1 and Table 3. Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 6415625 7612530 8910935 1029441 1158146 50251277151 13966,556 1526061 1785271 2034481 25435102 30528,5122 7618930 8915835 10213141 11511646 633812710351 15284,361 17871,571 20361,781 25447102 30538,2122 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 6 © BSI 11-1999 Table 3 Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 25169,5 321312,2 3811,914,4 1054410,316,7 518,919,4 647,524,3 765,328,9 3051,6116 25309,5 3224,812,2 3821,414,4 4418,516,7 12,56,35115,519,4 6412,124,3 7610,228,9 898,433,8 3052,1116 2549,49,5 3237,112,2 3833,914,4 443016,7 1685126,419,4 6420,524,3 7617,828,9 8915,233,8 10213,538,8 3054,8116 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 © BSI 11-19997 Table 3 Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 25989,4 3272,612 385614 4447,516,5 5141,719 6432,324 20107625,128 892233 10219,838 11518,143 12716,648 13915,152 15213,257 3056,1114 251479,4 3211812 389314 4480,816,5 5168,619 645324 7643,228 2512,58938,233 1023338 1152843 12725,948 13923,252 15220,857 17817,867 20315,876 30510,2114 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 8 © BSI 11-1999 Table 3 Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 3818514 4415816,5 5113419 649924 7680,528 8969,133 10258,838 321611551,543 12744,848 13942,352 15237,857 17832,567 20328,976 25421,495 30518,3114 51181,619 6414024 7610828 8990,733 1028138 11571,843 402012762,748 13957,552 15251,657 17844,167 20336,776 25430,195 30524,6114 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 © BSI 11-19999 Table 3 2.4 Spring rate-strong Colour code: Red See Figure 1 and Table 4. Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 6420924 7616828 8914033 10211938 11510643 1279748 50251398752 1528057 17869,567 20359,876 22950,986 25443,995 30538,6114 7631228 8926033 10222138 11518743 12716848 633815213657 17811467 20310076 22989,286 25478,495 30564,7114 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 10 © BSI 11-1999 Table 4 Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 2522,17,5 3217,59,6 3817,111,4 105441513,2 5112,815,3 6410,719,2 767,522,8 3052,191,5 2542,17,5 3233,29,6 3829,311,4 4424,613,2 12,56,35119,615,3 641519,2 7613,222,8 8911,426,7 3052,891,5 2575,77,5 3252,89,6 3848,511,4 4442,813,2 1685137,115,3 6430,319,2 7625,722,8 8921,726,7 10219,330,6 3057,191,5 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 © BSI 11-199911 Table 4 Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 252167,5 321689,6 3812911 4411213 519415 6472,119 20107659,723 8950,527 10244,231 11538,435 12734,138 1393142 15228,246 3051591 253757,5 322979,6 3821911 4418713 5115615 6412319 769923 2512,5898427 1027331 1156535 12757,738 13952,742 15247,846 1784153 20335,861 30522,991 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 12 © BSI 11-1999 Table 4 Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 3838811 4432413 5127215 6421219 7617223 8914127 10212231 321611510735 1279338 1398642 1527846 17867,253 20359,161 25446,476 3053891 5135015 6426919 7621923 8919027 10216331 11514235 402012712838 13911542 15210546 1788953 2037761 2546176 3055191 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 © BSI 11-199913 Table 4 2.5 Spring rate extra strong Colour code: Yellow See Figure 1 and Table 5. Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 6441319 7633923 8928827 10224531 11521535 502512719238 13916842 15215446 17813453 20311761 2548976 3057391 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 14 © BSI 11-1999 Table 5 Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 2536,86,2 3227,98 3823,79,5 1054419,211 5116,513 6413,216 7610,919 3052,676 2558,56,2 3243,98 38369,5 4430,311 12,56,35126,213 6421,216 7617,119 8914,522 3054,376 251186,2 32898 3872,19,5 4460,911 1685152,313 6441,216 7634,119 8929,522 10225,626 3058,476 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 © BSI 11-199915 Table 5 Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 252936,2 322248 381779,5 4414911 5112813 649916 20107681,719 8969,522 10260,626 1155329 12747,532 1394335 1523938 30521,276 32374,48 383469,5 4424411 51207,513 6416116 76130,819 2512,589110,522 10296,326 11585,729 12776,332 15263,538 17853,944 2034751 30530,976 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 16 © BSI 11-1999 Table 5 Hole diameterRod diameterFree length Required force to deflect 1 mm Maximum operating deflection DHDdLo H15 mm h15 mmmm ± 10 % Nmm 38528,29,5 44424,411 5135313 64269,216 76218,519 89180,322 321610215526 11514029 12712432 15210238 17888,244 2037651 25460,864 3054976 5162813 6448716 7637919 8932122 10228126 402011524529 12722132 15216838 20313251 25410764 30587,876 6470916 7657219 8947522 10240526 502511535229 12731632 15223938 20318751 25415364 30512776 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4:1992 © BSI 11-199917 3 Designation A compression spring in accordance with this International Standard shall be designated by a) compression spring; b) reference to this International Standard; c) its hole diameter, DH, in millimetres; d) its free length, Lo, in millimetres; e) its spring rate (light, medium, strong, extra strong); f) its colour code. EXAMPLE A compression spring with hole diameter DH= 10 mm, free length Lo = 25 mm, spring rate-light, and colour code: green, is described as follows: Compression spring ISO 10243 10 × 25 light green Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 09:58:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7568-4: 1992 ISO 10243: 1991 BSI 389 Chiswick High Road London W4 4AL 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 make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. 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