{"id":3059,"date":"2018-08-23T21:16:32","date_gmt":"2018-08-23T21:16:32","guid":{"rendered":"https:\/\/www.adcolegage.com\/pt\/?p=3059"},"modified":"2026-04-13T18:40:07","modified_gmt":"2026-04-13T18:40:07","slug":"have-you-purchased-a-diameter-gage-or-a-roundness-gage","status":"publish","type":"post","link":"https:\/\/www.adcolegage.com\/pt\/blog\/2018\/08\/23\/have-you-purchased-a-diameter-gage-or-a-roundness-gage\/","title":{"rendered":"Voc\u00ea comprou um medidor de di\u00e2metro ou um medidor de circularidade?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"3059\" class=\"elementor elementor-3059\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4abfc409 e-con-full e-flex e-con e-parent\" data-id=\"4abfc409\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-5a30b2d interior-banner interior-banner--grayscale e-flex e-con-boxed e-con e-child\" data-id=\"5a30b2d\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-175e4935 e-con-full e-flex e-con e-child\" data-id=\"175e4935\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2ab1c4aa heading1 elementor-widget elementor-widget-heading\" data-id=\"2ab1c4aa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Voc\u00ea comprou um medidor de di\u00e2metro ou um medidor de circularidade?<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5f0b15b elementor-widget elementor-widget-heading\" data-id=\"5f0b15b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span class=\"elementor-heading-title elementor-size-default\">Documenta\u00e7\u00e3o t\u00e9cnica<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-657d0e80 e-flex e-con-boxed e-con e-child\" data-id=\"657d0e80\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-23ecc5da elementor-hidden-mobile elementor-widget elementor-widget-hfe-breadcrumbs-widget\" data-id=\"23ecc5da\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"hfe-breadcrumbs-widget.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<nav aria-label=\"Breadcrumb\"><ul class=\"hfe-breadcrumbs hfe-breadcrumbs-show-home\"><li 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elementor-hidden-desktop elementor-hidden-tablet elementor-view-default elementor-position-block-start elementor-widget elementor-widget-icon-box\" data-id=\"632f0452\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<a href=\"\/\" class=\"elementor-icon\" tabindex=\"-1\" aria-label=\"Back to Previous\">\n\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-arrow-left\"><\/i>\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<a href=\"\/\" >\n\t\t\t\t\t\t\tBack to Previous\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/span>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3ac560df elementor-widget elementor-widget-post-info\" data-id=\"3ac560df\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-inline-items elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-2492c82 elementor-inline-item\" itemprop=\"datePublished\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-date\">\n\t\t\t\t\t\t\t\t\t\t<time>23\/08\/2018<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-400bcd65 e-flex e-con-boxed e-con e-parent\" data-id=\"400bcd65\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-3a34576b e-con-full e-flex e-con e-child\" data-id=\"3a34576b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-11bf39bf elementor-widget elementor-widget-text-editor\" data-id=\"11bf39bf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Adcole<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-74205b92 elementor-widget elementor-widget-text-editor\" data-id=\"74205b92\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Se esta \u00e9 a primeira vez que voc\u00ea passa pelo processo de compra de um calibrador cil\u00edndrico, voc\u00ea se deparar\u00e1 com uma ampla gama de op\u00e7\u00f5es. Quando se trata de pe\u00e7as cil\u00edndricas, voc\u00ea pode escolher entre uma m\u00e1quina que faz medi\u00e7\u00f5es radiais usando uma sonda de ponto \u00fanico (geralmente um medidor de circularidade) ou uma que usa pontos de contato para medi\u00e7\u00e3o de di\u00e2metro (um medidor de di\u00e2metro). Cada uma delas tem aplica\u00e7\u00f5es espec\u00edficas. Em ambos, os transdutores de medi\u00e7\u00e3o s\u00e3o perpendiculares ao eixo da pe\u00e7a. Com o medidor de ponto oposto, \u00e9 menos cr\u00edtico controlar o eixo da pe\u00e7a em rela\u00e7\u00e3o \u00e0s sondas de medi\u00e7\u00e3o. Um desvio relativamente grande no fuso tem menos efeito sobre o tipo de medi\u00e7\u00e3o (di\u00e2metros) que ele realiza. \u00c0 medida que a pe\u00e7a se move em dire\u00e7\u00e3o a uma sonda, ela se afasta da outra. A medi\u00e7\u00e3o do tamanho relativo da pe\u00e7a, portanto, permanece a mesma (embora o movimento vertical da pe\u00e7a possa afetar o resultado quando um seguidor arredondado \u00e9 usado). Com esse sistema, um fuso mais barato com excentricidade relativamente alta pode ser usado sem afetar negativamente a medi\u00e7\u00e3o.<\/p><p><strong>No entanto, um sistema de dois pontos n\u00e3o \u00e9 suficiente para medir a circularidade. Veja por qu\u00ea:<\/strong><\/p><p>Imagine um cilindro com um padr\u00e3o de tr\u00eas quartos ou &#8220;folha de trevo&#8221; ao redor de sua circunfer\u00eancia. Quando uma das sondas entra em um vale, a outra se aproxima de um pico. Para o medidor de di\u00e2metro de dois pontos, essa pe\u00e7a parece redonda. Isso certamente n\u00e3o \u00e9 o que queremos ao medir uma caracter\u00edstica t\u00e3o importante como a circularidade! Em vez disso, \u00e9 necess\u00e1rio usar o medidor de contato de ponto \u00fanico (radial). (Observa\u00e7\u00e3o: esse tipo de medidor entra em contato com um ponto de cada vez, mas a pe\u00e7a \u00e9 girada para coletar o conjunto completo de dados). O medidor de contato de ponto \u00fanico pode oferecer muito mais do que medi\u00e7\u00f5es de di\u00e2metro. No entanto, h\u00e1 um pre\u00e7o a pagar. Para realizar medi\u00e7\u00f5es radiais precisas, precisamos controlar o eixo da pe\u00e7a enquanto ela gira para a medi\u00e7\u00e3o. Isso requer um sistema que possa fixar a pe\u00e7a com seguran\u00e7a e, ao mesmo tempo, introduzir muito pouco erro de excentricidade. Portanto, um eixo de precis\u00e3o \u00e9 essencial para esse medidor. Considere o peso da pe\u00e7a e voc\u00ea precisar\u00e1 de um tipo altamente especializado de fuso de precis\u00e3o. Isso \u00e9 respons\u00e1vel por grande parte da diferen\u00e7a de pre\u00e7o entre um medidor de di\u00e2metro e um medidor de circularidade ou perfil.<\/p><p><strong>Um erro comum \u00e9 comprar um medidor de dois pontos com base no pre\u00e7o, apenas para descobrir mais tarde que ele n\u00e3o pode inspecionar caracter\u00edsticas importantes, como perfil, vibra\u00e7\u00e3o e circularidade.<\/strong><\/p><p>Por\u00e9m, quando o medidor de contato de dois pontos n\u00e3o pode fornecer o arredondamento, o contato de ponto \u00fanico pode fornecer o di\u00e2metro. Isso ocorre porque toda a nuvem de pontos \u00e9 armazenada em rela\u00e7\u00e3o ao centro preciso da pe\u00e7a. Portanto, basta aplicar um pouco de matem\u00e1tica para obter um di\u00e2metro m\u00e9dio, o di\u00e2metro m\u00e1ximo e m\u00ednimo de dois pontos, etc.<\/p><p>Cuidado com os medidores de dois pontos que tentam imitar os resultados dos medidores de ponto \u00fanico. Termos como &#8220;circularidade diametral&#8221; e &#8220;ovalidade&#8221; s\u00e3o usados como tentativas matem\u00e1ticas de aproximar uma medi\u00e7\u00e3o de circularidade. Em nenhum lugar dos padr\u00f5es de circularidade (ISO, ANSI ou JIS) \u00e9 feita uma exce\u00e7\u00e3o que permita a manipula\u00e7\u00e3o dos dados do lado oposto. Embora a medi\u00e7\u00e3o da ovalidade possa ter algum valor (mas h\u00e1 maneiras melhores de quantificar esse erro), ela N\u00c3O substitui uma medi\u00e7\u00e3o verdadeira da circularidade.<\/p><p>\u00c0s vezes, vale a pena investir um pouco mais no in\u00edcio para obter um medidor que possa fazer TODAS as medi\u00e7\u00f5es que seu projeto ou um projeto futuro exigir\u00e1.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-12fb418b elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"12fb418b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d84250a elementor-icon-list--layout-inline elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"d84250a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items elementor-inline-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"#\">\n\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">CCMM<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"#\">\n\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Medidores de eixo GD&amp;T<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-407ac3bf e-con-full e-flex e-con e-child\" data-id=\"407ac3bf\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-18d01edc elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"18d01edc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-40fa99f7 elementor-widget elementor-widget-text-editor\" data-id=\"40fa99f7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Instrumentos e software relacionados<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1a8b96cc elementor-align-end elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"1a8b96cc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.adcolegage.com\/pt\/shaft-metrology\/\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-arrow-right\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Medidores Adcole para circularidade e di\u00e2metro<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-783667b4 e-flex e-con-boxed e-con e-parent\" data-id=\"783667b4\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-5f19e043 e-con-full e-flex e-con e-child\" data-id=\"5f19e043\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-28b64426 e-con-full e-flex e-con e-child\" data-id=\"28b64426\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-694788e3 eyebrow-heading elementor-widget elementor-widget-heading\" data-id=\"694788e3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span class=\"elementor-heading-title elementor-size-default\">Alguma d\u00favida?<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-14264fb2 heading3 elementor-widget elementor-widget-heading\" data-id=\"14264fb2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Entre em contato com nossos especialistas<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c52cc2 e-con-full e-flex e-con e-child\" data-id=\"c52cc2\" data-element_type=\"container\" data-e-type=\"container\" 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