{"id":260554,"date":"2024-10-19T17:15:24","date_gmt":"2024-10-19T17:15:24","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-118912012\/"},"modified":"2024-10-25T12:58:15","modified_gmt":"2024-10-25T12:58:15","slug":"bs-iso-118912012","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-118912012\/","title":{"rendered":"BS ISO 11891:2012"},"content":{"rendered":"<p>This International Standard specifies the materials, shapes, spring characteristics, tolerances, manufacturing requirements and test methods for common helical compression springs, which are made from hot coiled round section steel bar, and then quenched and tempered (hereinafter simply &#8220;springs&#8221;).<\/p>\n<p>The following limit values apply to springs conforming to this International Standard:<\/p>\n<ul>\n<li>\n<p>free length:&nbsp;\u2264&nbsp;900&nbsp;mm;<\/p>\n<\/li>\n<li>\n<p>spring index: 3 to 12;<\/p>\n<\/li>\n<li>\n<p>slenderness ratio: 0,8 to 4;<\/p>\n<\/li>\n<li>\n<p>active coils:&nbsp;\u2265&nbsp;3;<\/p>\n<\/li>\n<li>\n<p>spring pitch:&nbsp;&lt;&nbsp;0,5<i>D<\/i>;<\/p>\n<\/li>\n<li>\n<p>wire diameter: 8&nbsp;mm to 60&nbsp;mm;<\/p>\n<\/li>\n<li>\n<p>mean diameter of coil:&nbsp;\u2264&nbsp;460&nbsp;mm.<\/p>\n<\/li>\n<\/ul>\n<p>This International Standard is not applicable to coil springs with special performance requirements, such as railway and automotive suspensions.<\/p>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>3<b><\/td>\n<td>CVP_Secretariat_Loca  <\/td>\n<\/tr>\n<tr>\n<td><b>6<b><\/td>\n<td>Foreword  <\/td>\n<\/tr>\n<tr>\n<td><b>7<b><\/td>\n<td>1\tScope <br \/> 2\tNormative references <br \/> 3\tTerms, definitions and symbols <br \/> 3.1\tTerms and definitions <br \/> 3.2\tSymbols and units  <\/td>\n<\/tr>\n<tr>\n<td><b>8<b><\/td>\n<td>4\tMaterial <br \/> 4.1\tAdoption of material <br \/> 4.2\tDiameter and tolerance of bars <br \/> 5\tSpring construction <br \/> 5.1\tDirection of helix  <\/td>\n<\/tr>\n<tr>\n<td><b>9<b><\/td>\n<td>5.2\tTypes of coil end <br \/> 6\tSpring characteristics <br \/> 6.1\tGeneral <br \/> 6.2\tLength at a specified load <br \/> 6.3\tLoad at a specified length <br \/> 6.4\tSpring rate <br \/> 7\tTolerances of spring dimensions and characteristics <br \/> 7.1\tGeneral  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>7.2\tFree length <br \/> 7.3\tDiameter of coils <br \/> 7.4\tTotal coils <br \/> 7.5\tPerpendicularity <br \/> 7.6\tParallelism  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>7.7\tIrregularity of pitch <br \/> 7.8\tSolid length <br \/> 7.9\tTolerances on spring characteristics  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>8\tRequirements for manufacturing <br \/> 8.1\tHeat treatment <br \/> 8.2\tHardness <br \/> 8.3\tDecarburization <br \/> 8.4\tGrain size <br \/> 8.5\tSurface conditions <br \/> 8.6\tEnd surface machining <br \/> 8.7\tShot peening <br \/> 8.8\tSetting (presetting) <br \/> 8.9\tSurface protection <br \/> 9\tTest methods <br \/> 9.1\tGeneral  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>9.2\tSpring characteristics <br \/> 9.3\tDimensions and shapes  <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>9.4\tSurface conditions <br \/> 9.5\tHardness <br \/> 9.6\tDecarburization <br \/> 9.7\tGrain size <br \/> 9.8\tShot peening <br \/> 9.9\tSurface protection  <\/td>\n<\/tr>\n<tr>\n<td><b>15<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Hot formed helical compression springs. Technical specifications<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2012<\/td>\n<td>18<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":260558,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-260554","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/260554","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/260558"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=260554"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=260554"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=260554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}