{"id":558650,"date":"2024-11-05T18:21:38","date_gmt":"2024-11-05T18:21:38","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/esdu-850272010\/"},"modified":"2024-11-05T18:21:38","modified_gmt":"2024-11-05T18:21:38","slug":"esdu-850272010","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/esdu\/esdu-850272010\/","title":{"rendered":"ESDU 85027:2010"},"content":{"rendered":"<p><strong>INTRODUCTION<\/strong><\/p>\n<p>This Item provides charts and calculation methods for<br \/>\ndetermining the minimum lubricant film thickness in concentrated<br \/>\ncontacts that occur, for example, in rolling bearings and gears; in<br \/>\nsuch contacts, often called Hertzian contacts, the nominal contact<br \/>\narea increases with applied load.<\/p>\n<p>For the purpose of calculating the lubricant film thickness,<br \/>\nHertzian contacts are regarded as either two-dimensional, with<br \/>\nnominally line contact, or three-dimensional, with nominally point<br \/>\ncontact. Nominally line contact occurs in, for example, roller<br \/>\nbearings, roller followers on cams and spur gears while<br \/>\nthree-dimensional contacts occur in, for example, ball bearings.<br \/>\nThe charts and calculation methods presented in this Item apply to<br \/>\ntwo-dimensional contacts. It is frequently possible to obtain<br \/>\nguidance on some three-dimensional contacts using these methods<br \/>\n(see Section 4).<\/p>\n<p>The text of this Item is divided into three main parts. The<br \/>\nfirst part (Section 3) describes the operation of a lubricated<br \/>\nHertzian contact. The second part (Sections 4 and 5) gives guidance<br \/>\non the specification of the design parameters, identification of<br \/>\nthe regime of operation and determination of the film thickness.<br \/>\nThe final part gives guidance on ensuring that the contact will<br \/>\noperate with an adequate margin of safety.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Film Thicknesses in Lubricated Hertzian Contacts (EHL) &#8211; Part 1: Two-Dimensional Contacts (Line Contacts)<\/b><\/p>\n<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\/esdu\/\"><b>ESDU<\/b><\/a><\/td>\n<td>2010-02<\/td>\n<td>35<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":558660,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2675],"product_tag":[],"class_list":{"0":"post-558650","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-esdu","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\/558650","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\/558660"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=558650"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=558650"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=558650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}