{"id":2953,"date":"2021-01-21T09:08:57","date_gmt":"2021-01-21T08:08:57","guid":{"rendered":"https:\/\/www.redhillballs.com\/?page_id=2953"},"modified":"2025-09-29T10:34:05","modified_gmt":"2025-09-29T08:34:05","slug":"esferas-de-rockbit-s2","status":"publish","type":"page","link":"https:\/\/www.redhillballs.com\/pt-pt\/produtos\/esferas-de-metais-nao-ferrosos-e-suas-ligas\/esferas-de-rockbit-s2\/","title":{"rendered":"Esferas de RockBit (S2)"},"content":{"rendered":"<h2>\ud83d\udee0\ufe0f <a href=\"https:\/\/en.wikipedia.org\/wiki\/Tool_steel\">Esferas de a\u00e7o-ferramenta S2 RockBit \u2013 elementos de rolamento resistentes a choque para perfura\u00e7\u00e3o<\/a><\/h2>\n<p>As Esferas S2 RockBit em a\u00e7o-ferramenta resistente a choque s\u00e3o projetadas para tens\u00f5es de contato extremas, impacto e abras\u00e3o em ambientes de perfura\u00e7\u00e3o. Tratadas termicamente para alta dureza mantendo a tenacidade, resistem \u00e0 esfolia\u00e7\u00e3o (spalling) e ao brinelamento (brinelling) em servi\u00e7o com lama\u2014ideais para brocas tric\u00f4nicas, ferramentas de fundo de po\u00e7o e mecanismos percussivos pesados.<\/p>\n<h3>\ud83d\udd27 Especifica\u00e7\u00f5es t\u00e9cnicas principais<\/h3>\n<ul>\n<li><strong>Composi\u00e7\u00e3o<\/strong>: a\u00e7o-ferramenta S2 resistente a choques (t\u00edp.): C 0,45\u20130,55%, Si 0,20\u20131,00%, Mn 0,20\u20131,00%, Cr 0,15\u20130,80%, Mo 0,30\u20130,80% (Fe balan\u00e7o)<\/li>\n<li><strong>Estrutura<\/strong>: martensita revenida com carbonetos finamente dispersos<\/li>\n<li><strong>Dureza<\/strong>: Rockwell C 58\u201364 (tratado termicamente)<\/li>\n<li><strong>Resist\u00eancia \u00e0 tra\u00e7\u00e3o<\/strong>: at\u00e9 \u2248 2.100 MPa (dependente da condi\u00e7\u00e3o)<\/li>\n<li><strong>Densidade<\/strong>: ~7,80 g\/cm\u00b3<\/li>\n<li><strong>Corros\u00e3o<\/strong>: limitada; usar lubrifica\u00e7\u00e3o\/revestimentos para prote\u00e7\u00e3o<\/li>\n<li><strong>Magn\u00e9tico<\/strong>: totalmente magn\u00e9ticas<\/li>\n<\/ul>\n<h3>\u2705 Vantagens<\/h3>\n<ul>\n<li><strong>Alta tenacidade ao impacto<\/strong>: resiste a choques e vibra\u00e7\u00f5es<\/li>\n<li><strong>Anti-spalling\/anti-brinelling<\/strong> sob cargas hertzianas extremas<\/li>\n<li><strong>Resist\u00eancia \u00e0 abras\u00e3o<\/strong> em lama de perfura\u00e7\u00e3o e particulados<\/li>\n<li><strong>Estabilidade dimensional<\/strong> ap\u00f3s tratamento t\u00e9rmico<\/li>\n<\/ul>\n<h3>\ud83d\udd04 Aplica\u00e7\u00f5es das Esferas S2 RockBit<\/h3>\n<ul>\n<li><strong>Rolamentos de brocas tric\u00f4nicas<\/strong><\/li>\n<li><strong>Ferramentas de fundo de po\u00e7o &amp; mecanismos percussivos<\/strong><\/li>\n<li><strong>Rolamentos industriais pesados<\/strong> em meios abrasivos<\/li>\n<\/ul>\n<h3>\ud83d\udce6 Graus &amp; tamanhos dispon\u00edveis<\/h3>\n<ul>\n<li><a href=\"https:\/\/www.redhillballs.com\/company\/precision-grades\/\"><strong>Graus<\/strong>: ISO 3290, DIN 5401, AFBMA (toler\u00e2ncias equivalentes)<\/a><\/li>\n<li><strong>Faixa de di\u00e2metros<\/strong>: tamanhos imperiais e m\u00e9tricos padr\u00e3o; n\u00e3o padr\u00e3o\/sob medida sob consulta<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udee0\ufe0f Esferas de a\u00e7o-ferramenta S2 RockBit \u2013 elementos de rolamento resistentes a choque para perfura\u00e7\u00e3o As Esferas S2 RockBit em a\u00e7o-ferramenta resistente a choque s\u00e3o projetadas para tens\u00f5es de contato extremas, impacto e abras\u00e3o em ambientes de perfura\u00e7\u00e3o. Tratadas termicamente para alta dureza mantendo a tenacidade, resistem \u00e0 esfolia\u00e7\u00e3o (spalling) e ao brinelamento (brinelling) em [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8764,"parent":2937,"menu_order":8,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2953","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Esferas de RockBit (S2) \u2013 impacto e resist\u00eancia<\/title>\n<meta name=\"description\" content=\"Esferas de RockBit (S2) oferecem alta tenacidade, resist\u00eancia ao desgaste e ao impacto, ideais para perfura\u00e7\u00e3o e uso industrial pesado.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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