{"id":62636,"date":"2026-06-23T09:18:27","date_gmt":"2026-06-23T07:18:27","guid":{"rendered":"https:\/\/spreitzer.de\/techblog\/etau-autocentrant-ou-etau-de-machine\/"},"modified":"2026-06-23T09:18:27","modified_gmt":"2026-06-23T07:18:27","slug":"etau-autocentrant-ou-etau-de-machine","status":"publish","type":"wt_fachwissen","link":"https:\/\/spreitzer.de\/fr\/techblog\/etau-autocentrant-ou-etau-de-machine\/","title":{"rendered":"\u00c9tau autocentrant ou \u00e9tau de machine\u00a0? Le comparatif pratique"},"content":{"rendered":"<div class=\"fw-tldr\" style=\"border-left:4px solid #c8102e;background:#f6f6f6;padding:16px 20px;margin:0 0 28px;border-radius:4px\"><strong>En bref\u00a0:<\/strong><\/p>\n<ul>\n<li><strong>\u00c9tau de machine\u00a0:<\/strong> une m\u00e2choire fixe \u2013 le centre de la pi\u00e8ce se d\u00e9place en fonction de la largeur.<\/li>\n<li><strong>\u00c9tau autocentrant\u00a0:<\/strong> les deux m\u00e2choires centrent la pi\u00e8ce sur un centre fixe \u2013 de mani\u00e8re reproductible.<\/li>\n<li>Pour les s\u00e9ries, le serrage multiple et l\u2019automatisation, l\u2019\u00e9tau autocentrant est pratiquement incontournable.<\/li>\n<\/ul>\n<\/div>\n<h2>La diff\u00e9rence de principe<\/h2>\n<p>Sur l\u2019\u00e9tau de machine classique, une m\u00e2choire est fixe et l\u2019autre mobile. Si l\u2019on serre des pi\u00e8ces de largeurs diff\u00e9rentes, leur centre se d\u00e9cale. Avec un <strong>\u00e9tau autocentrant<\/strong>, les deux m\u00e2choires se d\u00e9placent de mani\u00e8re synchrone vers un point central fixe \u2013 le centre de la pi\u00e8ce reste toujours au m\u00eame endroit.<\/p>\n<h2>Quand un \u00e9tau de machine suffit-il\u00a0?<\/h2>\n<p>Pour les pi\u00e8ces unitaires, la fabrication manuelle et lorsque la position centrale n\u2019est pas critique, l\u2019\u00e9tau de machine est robuste et \u00e9conomique.<\/p>\n<h2>Quand l\u2019\u00e9tau autocentrant est-il rentable\u00a0?<\/h2>\n<p>D\u00e8s que la <strong>r\u00e9p\u00e9tabilit\u00e9<\/strong>, les s\u00e9ries, l\u2019usinage multi-faces ou l\u2019automatisation entrent en jeu \u2013 le centre fixe fait alors valoir tout son avantage.<\/p>\n<h2>Comparaison en un coup d\u2019\u0153il<\/h2>\n<table border=\"1\" cellpadding=\"8\" style=\"border-collapse:collapse\">\n<thead>\n<tr>\n<th>Crit\u00e8re<\/th>\n<th>\u00c9tau de machine<\/th>\n<th>\u00c9tau autocentrant<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Centre de la pi\u00e8ce<\/td>\n<td>se d\u00e9place<\/td>\n<td>fixe<\/td>\n<\/tr>\n<tr>\n<td>R\u00e9p\u00e9tabilit\u00e9<\/td>\n<td>moyenne<\/td>\n<td>\u00e9lev\u00e9e<\/td>\n<\/tr>\n<tr>\n<td>Automatisable<\/td>\n<td>de fa\u00e7on limit\u00e9e<\/td>\n<td>oui<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>\u00c9tau de machine ou \u00e9tau autocentrant\u00a0? Le comparatif pratique\u00a0: centre de la pi\u00e8ce, r\u00e9p\u00e9tabilit\u00e9 et aptitude \u00e0 l\u2019automatisation en un coup d\u2019\u0153il.<\/p>\n","protected":false},"author":14,"featured_media":61698,"template":"","meta":[],"wt_wissensthema":[382],"class_list":["post-62636","wt_fachwissen","type-wt_fachwissen","status-publish","has-post-thumbnail","hentry","wt_wissensthema-technique-de-serrage"],"_links":{"self":[{"href":"https:\/\/spreitzer.de\/fr\/wp-json\/wp\/v2\/wt_fachwissen\/62636","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spreitzer.de\/fr\/wp-json\/wp\/v2\/wt_fachwissen"}],"about":[{"href":"https:\/\/spreitzer.de\/fr\/wp-json\/wp\/v2\/types\/wt_fachwissen"}],"author":[{"embeddable":true,"href":"https:\/\/spreitzer.de\/fr\/wp-json\/wp\/v2\/users\/14"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spreitzer.de\/fr\/wp-json\/wp\/v2\/media\/61698"}],"wp:attachment":[{"href":"https:\/\/spreitzer.de\/fr\/wp-json\/wp\/v2\/media?parent=62636"}],"wp:term":[{"taxonomy":"wt_wissensthema","embeddable":true,"href":"https:\/\/spreitzer.de\/fr\/wp-json\/wp\/v2\/wt_wissensthema?post=62636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}