{"id":1415,"date":"2018-11-27T16:10:54","date_gmt":"2018-11-27T18:10:54","guid":{"rendered":"https:\/\/rolclaro.com.br\/?page_id=1415"},"modified":"2018-11-27T16:10:54","modified_gmt":"2018-11-27T18:10:54","slug":"rolamento","status":"publish","type":"page","link":"https:\/\/rolclaro.com.br\/?page_id=1415","title":{"rendered":"Rolamento"},"content":{"rendered":"<div id=\"pl-1415\"  class=\"panel-layout\" >\n<div id=\"pg-1415-0\"  class=\"panel-grid panel-no-style\"  data-style=\"{&quot;background_image_attachment&quot;:false,&quot;background_display&quot;:&quot;tile&quot;,&quot;cell_alignment&quot;:&quot;flex-start&quot;}\"  data-ratio=\"1\"  data-ratio-direction=\"right\" >\n<div id=\"pgc-1415-0-0\"  class=\"panel-grid-cell\"  data-weight=\"1\" >\n<div id=\"panel-1415-0-0-0\" class=\"so-panel widget widget_custom_html panel-first-child panel-last-child\" data-index=\"0\" data-style=\"{&quot;padding&quot;:&quot;20px 20px 20px 20px&quot;,&quot;mobile_padding&quot;:&quot;20px 20px 20px 20px&quot;,&quot;background_image_attachment&quot;:false,&quot;background_display&quot;:&quot;tile&quot;,&quot;margin&quot;:&quot;20px 20px 20px 20px&quot;}\" >\n<div class=\"panel-widget-style panel-widget-style-for-1415-0-0-0\" >[siteorigin_widget class=&#8221;WP_Widget_Custom_HTML&#8221;]<input type=\"hidden\" value=\"{&quot;instance&quot;:{&quot;title&quot;:&quot;&quot;,&quot;content&quot;:&quot;&lt;center&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: medium;\\&quot;&gt;&lt;strong&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;O Rolamento &amp;ndash; Sua Hist&amp;oacute;ria&lt;\\\/span&gt;&lt;\\\/strong&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: medium;\\&quot;&gt;&lt;strong&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;Da Antiguidade Aos Tempos Atuais&lt;\\\/span&gt;&lt;\\\/strong&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;A primeira utilidade do &lt;strong&gt;&amp;ldquo;rolamento&amp;rdquo;&lt;\\\/strong&gt; que nos vem &amp;agrave; cabe&amp;ccedil;a &amp;eacute; servir como elemento auxiliar no transporte (at&amp;eacute; por causa dos carrinhos de &lt;strong&gt;&amp;ldquo;rolim&amp;atilde;&amp;rdquo;&lt;\\\/strong&gt; da inf&amp;acirc;ncia). E nisso os &lt;strong&gt;&amp;ldquo;rolamentos&amp;rdquo;&lt;\\\/strong&gt; s&amp;atilde;o bem antigos. Alguns situam o in&amp;iacute;cio do seu uso por volta do ano 4.000 A.C., ajudando os Scandinavos a deslizar com seus tren&amp;oacute;s. Atrav&amp;eacute;s de pictografias existentes na Noruega podemos ver uma estrutura formada por madeiras com rodas que se assemelhava a um tren&amp;oacute;. Outros historiadores preferem apontar o seu in&amp;iacute;cio por volta de 3.500 A.C., quando os Sum&amp;eacute;rios utilizaram um cubo de roda constru&amp;iacute;do em madeira montado sobre um eixo tamb&amp;eacute;m de madeira, conforme uma ilustra&amp;ccedil;&amp;atilde;o de uma biga usada por este povo.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;J&amp;aacute; os eg&amp;iacute;pcios apresentam diversas provas do seu uso. A constru&amp;ccedil;&amp;atilde;o de seus in&amp;uacute;meros monumentos foi muito facilitada quando passaram a usar rolos de madeiras para transportar pedras de grande peso. H&amp;aacute; inclusive uma ilustra&amp;ccedil;&amp;atilde;o datada de cerca de 1.800 A.C., que mostra um eg&amp;iacute;pcio na ponta da pedra entornando um lubrificante no ch&amp;atilde;o. Essa ilustra&amp;ccedil;&amp;atilde;o &amp;eacute; freq&amp;uuml;entemente referida como a mais antiga figura de um &lt;strong&gt;&amp;ldquo;engenho de lubrifica&amp;ccedil;&amp;atilde;o&amp;rdquo;&lt;\\\/strong&gt; trabalhando.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;Nas civiliza&amp;ccedil;&amp;otilde;es cl&amp;aacute;ssicas, Gr&amp;eacute;cia e Roma, temos grandes aplica&amp;ccedil;&amp;otilde;es de &lt;strong&gt;&amp;ldquo;elementos rolantes&amp;rdquo;&lt;\\\/strong&gt;. Em muitos escritos gregos encontramos refer&amp;ecirc;ncias ao uso de &lt;strong&gt;&amp;ldquo;rolim&amp;atilde;s&amp;rdquo;&lt;\\\/strong&gt; ou &lt;strong&gt;&amp;ldquo;esferas&amp;rdquo;&lt;\\\/strong&gt; e sobre as vantagens do uso de objetos esf&amp;eacute;ricos para prop&amp;oacute;sitos geom&amp;eacute;tricos e para aplica&amp;ccedil;&amp;otilde;es de engenharia, como em suas catapultas. Por&amp;eacute;m &amp;eacute; na civiliza&amp;ccedil;&amp;atilde;o Romana onde os mais espetaculares desenvolvimentos s&amp;atilde;o encontrados. Cerca de 30 quil&amp;ocirc;metros de Roma h&amp;aacute; um lago chamado Nemi, onde, no in&amp;iacute;cio deste s&amp;eacute;culo, arqueologistas descobriram duas embarca&amp;ccedil;&amp;otilde;es. Entre os in&amp;uacute;meros objetos encontrados, temos &lt;strong&gt;&amp;ldquo;duas esferas&amp;rdquo;&lt;\\\/strong&gt; que representam dois pontos de sumo interesse: um &amp;eacute; o uso de metal nessas esferas, uma transi&amp;ccedil;&amp;atilde;o do uso de madeira para metal em &lt;strong&gt;&amp;ldquo;rolamentos&amp;rdquo;&lt;\\\/strong&gt;, e outro &amp;eacute; o fato de que representa uma das mais antigas formas de &lt;strong&gt;&amp;ldquo;rolamentos&amp;rdquo;&lt;\\\/strong&gt; propriamente dito, apesar de que as esferas ou bolas n&amp;atilde;o tinham livre rota&amp;ccedil;&amp;atilde;o como nos modernos &lt;strong&gt;&amp;ldquo;rolamentos&amp;rdquo;&lt;\\\/strong&gt;. Na mesma &amp;eacute;poca dos Romanos, os Celtas tamb&amp;eacute;m mostram evid&amp;ecirc;ncias do uso de &lt;strong&gt;&amp;ldquo;rolamentos&amp;rdquo;&lt;\\\/strong&gt;.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;Ao longo do per&amp;iacute;odo da idade m&amp;eacute;dia, o chamado &amp;ldquo;per&amp;iacute;odo negro&amp;rdquo; em termos de desenvolvimento tecnol&amp;oacute;gico, existe pouca evid&amp;ecirc;ncia do uso ou desenvolvimento continuado de &lt;strong&gt;&amp;ldquo;rolamentos&amp;rdquo;&lt;\\\/strong&gt;. Isto &amp;eacute;, na verdade, uma realidade para v&amp;aacute;rios aspectos da tecnologia e da cultura em geral, de modo que somente no in&amp;iacute;cio do s&amp;eacute;culo XVI voltamos a falar de &lt;strong&gt;&amp;ldquo;rolamentos&amp;rdquo;&lt;\\\/strong&gt;.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;Por volta do ano 1.500 &amp;eacute; que Leonardo da Vinci consubstanciou um dos sonhos mais antigos da humanidade, o de possuir um ve&amp;iacute;culo que se locomove sem o emprego de for&amp;ccedil;a muscular, em id&amp;eacute;ia concreta, fixando suas concep&amp;ccedil;&amp;otilde;es em desenhos t&amp;eacute;cnicos. N&amp;atilde;o h&amp;aacute; qualquer d&amp;uacute;vida a respeito de que foi Leonardo da Vinci tamb&amp;eacute;m quem primeiro pensou num ve&amp;iacute;culo de locomo&amp;ccedil;&amp;atilde;o por for&amp;ccedil;a pr&amp;oacute;pria. Comprova-se isto por uma ilustra&amp;ccedil;&amp;atilde;o sua e pelo projeto de um carro, impulsionado por um sistema de molas que possui at&amp;eacute; uma transmiss&amp;atilde;o com diferencial.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;Provavelmente, Leonardo nunca chegou a realizar seu carro de autopropuls&amp;atilde;o, no entanto, cabe-lhe o m&amp;eacute;rito de ter tido a id&amp;eacute;ia de utilizar a energia armazenada num sistema de molas para locomover um ve&amp;iacute;culo.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;Este carro, que pode ser considerado como o percursor do autom&amp;oacute;vel moderno, provavelmente representa o &amp;uacute;ltimo est&amp;aacute;gio de um processo de desenvolvimento de Leonardo da Vinci. Isto se depreende claramente de seus desenhos. V&amp;aacute;rios dos componentes essenciais do autom&amp;oacute;vel de hoje podem ser atribu&amp;iacute;dos diretamente a Leonardo. Assim, por exemplo, Leonardo foi o primeiro a idealizar e desenhar um sistema de transmiss&amp;atilde;o para um ve&amp;iacute;culo com caixa de redu&amp;ccedil;&amp;atilde;o e volante de dire&amp;ccedil;&amp;atilde;o. Em outro projeto de ve&amp;iacute;culos, tamb&amp;eacute;m tinha previsto rodas dirig&amp;iacute;veis.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;A for&amp;ccedil;a motriz neste projeto era proporcionada por &amp;ldquo;8 homens&amp;rdquo; acionando manivelas, sendo transmitida para as rodas atrav&amp;eacute;s de uma caixa redutora. Finalmente, idealizou para o ve&amp;iacute;culo autopropulsionado o sistema de tra&amp;ccedil;&amp;atilde;o individual das rodas, e um engrenamento epic&amp;iacute;clico, que pode ser considerado como precursor do diferencial moderno.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;S&amp;atilde;o perfeitamente identific&amp;aacute;veis essas pe&amp;ccedil;as do ve&amp;iacute;culo nos seus desenhos. Em compensa&amp;ccedil;&amp;atilde;o, n&amp;atilde;o &amp;eacute; muito n&amp;iacute;tida a representa&amp;ccedil;&amp;atilde;o daquela parte que se refere ao sistema de acionamento com molas, o qual deveria suprir o ve&amp;iacute;culo com a necess&amp;aacute;ria for&amp;ccedil;a motriz. Conclui-se que foi a falta de um &amp;ldquo;motor&amp;rdquo; adequado que obrigou Leonardo a renunciar &amp;aacute; concretiza&amp;ccedil;&amp;atilde;o de seu &amp;ldquo;ve&amp;iacute;culo autopropulsionado&amp;rdquo;.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;Como &amp;eacute; not&amp;oacute;rio, o g&amp;ecirc;nio universalista de Leonardo da Vinci se ocupou com in&amp;uacute;meras coisas e id&amp;eacute;ias. Mesmo um assunto hoje t&amp;atilde;o atual quanto a economia de energia pode ser atribu&amp;iacute;do a ele, pois que Leonardo estudou muito intensamente o princ&amp;iacute;pio do fen&amp;ocirc;meno do atrito. Deve-se a ele a clara e completa distin&amp;ccedil;&amp;atilde;o entre o atrito deslizante e rolante entre corpos s&amp;oacute;lidos. Suas pesquisas te&amp;oacute;ricas e pr&amp;aacute;ticas abrangeram tamb&amp;eacute;m as diferen&amp;ccedil;as de magnitude do atrito conforme esp&amp;eacute;cie dos materiais em contato e tamb&amp;eacute;m, conforme a utiliza&amp;ccedil;&amp;atilde;o de meios lubrificantes entre as superf&amp;iacute;cies.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;Leonardo da Vinci dedicou especial aten&amp;ccedil;&amp;atilde;o &amp;aacute; quest&amp;atilde;o da redu&amp;ccedil;&amp;atilde;o da resist&amp;ecirc;ncia de atrito, utilizado na sustenta&amp;ccedil;&amp;atilde;o de corpos rotativos. Para tanto, muitas vezes ele previu cilindros, conforme os mostrados no desenho de seu projeto.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;Estes rudimentares projetos de &lt;strong&gt;&amp;ldquo;rolamento&amp;rdquo;&lt;\\\/strong&gt; provam que Leonardo da Vinci j&amp;aacute; tinha descoberto a maneira de reduzir a resist&amp;ecirc;ncia de giro, mediante o aux&amp;iacute;lio de cilindros que servem como &amp;ldquo;corpos rolantes&amp;rdquo;.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;As id&amp;eacute;ias de um ve&amp;iacute;culo autopropulsionado e as concep&amp;ccedil;&amp;otilde;es de mancais com baixo &amp;iacute;ndice de atrito j&amp;aacute; existiam l&amp;aacute; pelo ano de 1.500. Entretanto, at&amp;eacute; a concretiza&amp;ccedil;&amp;atilde;o destes projetos dever-se-iam passar ainda alguns s&amp;eacute;culos. Somente no s&amp;eacute;culo XVIII surgiu uma fonte de energia razo&amp;aacute;vel, com a m&amp;aacute;quina movida a vapor, que facultou James Watt em 1.759 a construir um pequeno modelo de um ve&amp;iacute;culo autopropulsionado, pr&amp;oacute;prio para locomover-se pelas ruas. Um certo desenvolvimento t&amp;eacute;cnico destes ve&amp;iacute;culos a vapor ocorreu nos s&amp;eacute;culos XVIII e XIX. Mas s&amp;oacute; com a descoberta do motor &amp;aacute; combust&amp;atilde;o foi dada uma base decisiva para o advento do autom&amp;oacute;vel como n&amp;oacute;s o conhecemos hoje.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;A hist&amp;oacute;ria dos primeiros &lt;strong&gt;&amp;ldquo;rolamentos&amp;rdquo;&lt;\\\/strong&gt; se assemelha &amp;aacute; do desenvolvimento do autom&amp;oacute;vel. Da id&amp;eacute;ia at&amp;eacute; a condi&amp;ccedil;&amp;atilde;o de fabrica&amp;ccedil;&amp;atilde;o industrial foi um longo e dif&amp;iacute;cil caminho. Sob o enfoque do princ&amp;iacute;pio fundamental, j&amp;aacute; na mais remota antiguidade foram empregados rolos cil&amp;iacute;ndricos de madeira para o transporte de pedras pesadas, que podemos considerar, de certa forma, os r&amp;uacute;sticos ancestrais dos &lt;strong&gt;&amp;ldquo;rolamentos de rolos&amp;rdquo;&lt;\\\/strong&gt;, sem levar em considera&amp;ccedil;&amp;atilde;o, &amp;eacute; claro, a concep&amp;ccedil;&amp;atilde;o t&amp;eacute;cnica e as aplica&amp;ccedil;&amp;otilde;es modernas dos &lt;strong&gt;&amp;ldquo;rolamentos&amp;rdquo;&lt;\\\/strong&gt; de nossos dias. Do mesmo modo como aconteceu a Leonardo da Vinci, o sucesso pr&amp;aacute;tico foi negado aos inventores do fim do s&amp;eacute;culo XVIII e in&amp;iacute;cio do s&amp;eacute;culo XIX. A transforma&amp;ccedil;&amp;atilde;o das id&amp;eacute;ias em pr&amp;aacute;tica esbarrava, segundo as evid&amp;ecirc;ncias, na impossibilidade de se produzir &lt;strong&gt;&amp;ldquo;esferas&amp;rdquo;&lt;\\\/strong&gt; com a precis&amp;atilde;o necess&amp;aacute;ria.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;A id&amp;eacute;ia fundamental da redu&amp;ccedil;&amp;atilde;o do atrito e a conseq&amp;uuml;ente economia de energia com a utiliza&amp;ccedil;&amp;atilde;o do &lt;strong&gt;&amp;ldquo;rolamento&amp;rdquo;&lt;\\\/strong&gt; permanece at&amp;eacute; hoje. A concretiza&amp;ccedil;&amp;atilde;o t&amp;eacute;cnica deste princ&amp;iacute;pio b&amp;aacute;sico foi imposta com o surgimento das bicicletas em meados do s&amp;eacute;culo XIX, quando a necessidade de se economizar for&amp;ccedil;a podia ser sentida no pr&amp;oacute;prio corpo.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;O desenvolvimento dos primeiros &lt;strong&gt;&amp;ldquo;rolamentos de esferas&amp;rdquo;&lt;\\\/strong&gt; recebeu um grande impulso gra&amp;ccedil;as &amp;agrave; bicicleta. Ap&amp;oacute;s algumas muta&amp;ccedil;&amp;otilde;es nos projetos, desenvolveu-se o assim chamado &lt;strong&gt;&amp;ldquo;rolamento tipo cone&amp;rdquo;&lt;\\\/strong&gt;. Eram &lt;strong&gt;&amp;ldquo;rolamentos de esferas&amp;rdquo;&lt;\\\/strong&gt; em que seus an&amp;eacute;is formavam a figura de um cone. Foram considerados como a solu&amp;ccedil;&amp;atilde;o adequada para cubos de rodas e pedaleiros. N&amp;atilde;o admira, portanto, que um &lt;strong&gt;&amp;ldquo;rolamento tipo cone ajust&amp;aacute;vel&amp;ldquo;&lt;\\\/strong&gt; tenha, no fim do s&amp;eacute;culo passado, substitu&amp;iacute;do o mancal deslizante at&amp;eacute; ent&amp;atilde;o utilizado nas rodas dos ve&amp;iacute;culos. O baixo &amp;iacute;ndice de atrito e a maior seguran&amp;ccedil;a de funcionamento foram os fatores determinantes para a introdu&amp;ccedil;&amp;atilde;o dos &lt;strong&gt;&amp;ldquo;rolamentos&amp;rdquo;&lt;\\\/strong&gt;.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;Na Europa, inicialmente, o desenvolvimento concentrou-se nos &lt;strong&gt;&amp;ldquo;rolamentos de esferas&amp;rdquo;&lt;\\\/strong&gt;. As experi&amp;ecirc;ncias com &lt;strong&gt;&amp;ldquo;rolamentos de rolos&amp;rdquo;&lt;\\\/strong&gt; n&amp;atilde;o foram as melhores. Nos Estados Unidos o desenvolvimento da ind&amp;uacute;stria automobil&amp;iacute;stica se baseou mais nos &lt;strong&gt;&amp;ldquo;rolamentos de rolos&amp;rdquo;&lt;\\\/strong&gt; e, em especial, nos &lt;strong&gt;&amp;ldquo;rolamentos de rolos c&amp;ocirc;nicos&amp;rdquo;&lt;\\\/strong&gt;. Na mesma &amp;eacute;poca, na Europa, desenvolveu-se o &lt;strong&gt;&amp;ldquo;rolamento de rolos cil&amp;iacute;ndricos&amp;rdquo;&lt;\\\/strong&gt; e o &amp;ldquo;&lt;strong&gt;rolamento autocompensador de uma carreira de rolos esf&amp;eacute;ricos&amp;rdquo;&lt;\\\/strong&gt;.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;Bem, aqui j&amp;aacute; ingressamos nos tempos modernos. E o desenvolvimento do &lt;strong&gt;&amp;ldquo;rolamento&amp;rdquo;&lt;\\\/strong&gt; continua at&amp;eacute; hoje. A pesquisa &amp;eacute; cont&amp;iacute;nua e novos produtos mais adequados &amp;agrave;s necessidades dos clientes v&amp;atilde;o surgindo. &amp;Eacute; importante ressaltar tamb&amp;eacute;m a pesquisa de novas mat&amp;eacute;rias-primas, como poliamida e cer&amp;acirc;mica. Enfim o &lt;strong&gt;&amp;ldquo;rolamento&amp;rdquo;&lt;\\\/strong&gt; do s&amp;eacute;culo XXI, j&amp;aacute; est&amp;aacute; entrando nas pranchetas de hoje.&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&amp;nbsp;&lt;\\\/p&gt;\\n&lt;p style=\\&quot;margin-bottom: 0cm; font-style: normal; text-align: justify;\\&quot;&gt;&lt;span style=\\&quot;font-family: Verdana, sans-serif;\\&quot;&gt;&lt;span style=\\&quot;font-size: small;\\&quot;&gt;&lt;strong&gt;&lt;span style=\\&quot;background: transparent;\\&quot;&gt;&amp;ldquo;Todo o texto deste artigo &amp;eacute; c&amp;oacute;pia fiel do Cap&amp;iacute;tulo II, do Livro: &amp;ldquo;A Ind&amp;uacute;stria de Rolamentos no Brasil&amp;rdquo;, que gentilmente nos foi cedido pela Srta.C&amp;iacute;ntia Gordo, da NSK do Brasil Ltda, para ela nossos agradecimentos..&amp;rdquo;&lt;\\\/span&gt;&lt;\\\/strong&gt;&lt;\\\/span&gt;&lt;\\\/span&gt;&lt;\\\/p&gt;&lt;\\\/center&gt;&quot;,&quot;id&quot;:&quot;custom_html-141510000&quot;,&quot;option_name&quot;:&quot;widget_custom_html&quot;},&quot;args&quot;:{&quot;before_widget&quot;:&quot;&lt;div id=\\&quot;panel-1415-0-0-0\\&quot; class=\\&quot;so-panel widget widget_custom_html panel-first-child panel-last-child\\&quot; data-index=\\&quot;0\\&quot; data-style=\\&quot;{&amp;quot;padding&amp;quot;:&amp;quot;20px 20px 20px 20px&amp;quot;,&amp;quot;mobile_padding&amp;quot;:&amp;quot;20px 20px 20px 20px&amp;quot;,&amp;quot;background_image_attachment&amp;quot;:false,&amp;quot;background_display&amp;quot;:&amp;quot;tile&amp;quot;,&amp;quot;margin&amp;quot;:&amp;quot;20px 20px 20px 20px&amp;quot;}\\&quot; &gt;&lt;div class=\\&quot;panel-widget-style panel-widget-style-for-1415-0-0-0\\&quot; &gt;&quot;,&quot;after_widget&quot;:&quot;&lt;\\\/div&gt;&lt;\\\/div&gt;&quot;,&quot;before_title&quot;:&quot;&lt;h3 class=\\&quot;widget-title\\&quot;&gt;&quot;,&quot;after_title&quot;:&quot;&lt;\\\/h3&gt;&quot;,&quot;widget_id&quot;:&quot;widget-0-0-0&quot;}}\" \/>[\/siteorigin_widget]<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<style type=\"text\/css\" class=\"panels-style\" data-panels-style-for-post=\"1415\">@import url(https:\/\/rolclaro.com.br\/wp-content\/plugins\/siteorigin-panels\/css\/front-flex.min.css); #pgc-1415-0-0 { width:100%;width:calc(100% - 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