{"id":20222,"date":"2026-09-29T06:08:59","date_gmt":"2026-09-28T22:08:59","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=20222"},"modified":"2026-10-24T23:39:17","modified_gmt":"2026-10-24T15:39:17","slug":"drill-speeds-and-feeds-chart","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/drill-speeds-and-feeds-chart\/","title":{"rendered":"Tabela de velocidades e avan\u00e7os para brocas de a\u00e7o r\u00e1pido"},"content":{"rendered":"<h1 class=\"wp-block-heading has-text-align-center has-x-large-font-size\" id=\"h-high-speed-steel-drill-speeds-and-feeds-chart\">Tabela de velocidades e avan\u00e7os para brocas de a\u00e7o r\u00e1pido<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Revolu\u00e7\u00f5es por minuto e avan\u00e7o por revolu\u00e7\u00e3o para brocas helicoidais de a\u00e7o r\u00e1pido, por di\u00e2metro da broca e por material a ser furado, com os fatores que trocam velocidade de corte pelo tempo que a broca opera entre reafiamentos. Um resumo de refer\u00eancia da pr\u00e1tica publicada e n\u00e3o uma especifica\u00e7\u00e3o da Aobo Steel.<\/p>\n\n\n\n<h2 id=\"h-how-the-drill-table-was-built\" class=\"wp-block-heading\">Como a tabela de brocas foi constru\u00edda<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A tabela \u00e9 um padr\u00e3o de oficina da \u00e9poca e n\u00e3o uma recomenda\u00e7\u00e3o moderna, e vale a pena saber como seus n\u00fameros foram definidos antes de us\u00e1-los. Sua base \u00e9 uma velocidade perif\u00e9rica de 60 a 65 p\u00e9s por minuto em a\u00e7o macio nos di\u00e2metros m\u00e9dios, e a velocidade perif\u00e9rica aumenta conforme o di\u00e2metro diminui. Essa \u00e9 a raz\u00e3o pela qual uma broca pequena gira muito mais r\u00e1pido que uma grande, e \u00e9 a raz\u00e3o pela qual a mesma tabela n\u00e3o pode ser lida como uma \u00fanica velocidade de corte. O avan\u00e7o \u00e9 dado por revolu\u00e7\u00e3o para uma broca de dois gumes. A fonte prefere o valor mais leve de cada par e permite o valor mais pesado onde a m\u00e1quina e a montagem s\u00e3o r\u00edgidas. Dois ajustes levam a tabela para o ch\u00e3o de f\u00e1brica. Operar sem lubrificante custa 15 a 20 por cento da velocidade, e alargadores rosa, cossinetes de rosca e machos operam a cerca de metade das velocidades tabeladas aqui para brocas.<\/p>\n\n\n\n<h2 id=\"h-speeds-and-feeds-for-high-speed-steel-drills\" class=\"wp-block-heading\">Velocidades e avan\u00e7os para brocas de a\u00e7o r\u00e1pido<\/h2>\n\n\n\n<h3 id=\"h-revolutions-per-minute-and-feed-per-revolution-by-drill-diameter\" class=\"wp-block-heading\">Revolu\u00e7\u00f5es por minuto e avan\u00e7o por revolu\u00e7\u00e3o, por di\u00e2metro da broca<\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Di\u00e2metro da broca, polegada<\/th><th class=\"has-text-align-left\" data-align=\"left\">A\u00e7o macio<\/th><th class=\"has-text-align-left\" data-align=\"left\">Ferro male\u00e1vel<\/th><th class=\"has-text-align-left\" data-align=\"left\">Ferro fundido<\/th><th class=\"has-text-align-left\" data-align=\"left\">Lat\u00e3o<\/th><th class=\"has-text-align-left\" data-align=\"left\">A\u00e7o ferramenta<\/th><th class=\"has-text-align-left\" data-align=\"left\">Avan\u00e7o por revolu\u00e7\u00e3o, polegada<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">1\/16<\/td><td class=\"has-text-align-left\" data-align=\"left\">4015<\/td><td class=\"has-text-align-left\" data-align=\"left\">4620<\/td><td class=\"has-text-align-left\" data-align=\"left\">4820<\/td><td class=\"has-text-align-left\" data-align=\"left\">7650<\/td><td class=\"has-text-align-left\" data-align=\"left\">1970<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,001 a 0,002<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3\/32<\/td><td class=\"has-text-align-left\" data-align=\"left\">1850<\/td><td class=\"has-text-align-left\" data-align=\"left\">1925<\/td><td class=\"has-text-align-left\" data-align=\"left\">2220<\/td><td class=\"has-text-align-left\" data-align=\"left\">3515<\/td><td class=\"has-text-align-left\" data-align=\"left\">906<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,002 a 0,004<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">1\/8<\/td><td class=\"has-text-align-left\" data-align=\"left\">1380<\/td><td class=\"has-text-align-left\" data-align=\"left\">1610<\/td><td class=\"has-text-align-left\" data-align=\"left\">1650<\/td><td class=\"has-text-align-left\" data-align=\"left\">2810<\/td><td class=\"has-text-align-left\" data-align=\"left\">675<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,003 a 0,006<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3\/16<\/td><td class=\"has-text-align-left\" data-align=\"left\">1040<\/td><td class=\"has-text-align-left\" data-align=\"left\">1190<\/td><td class=\"has-text-align-left\" data-align=\"left\">1250<\/td><td class=\"has-text-align-left\" data-align=\"left\">1970<\/td><td class=\"has-text-align-left\" data-align=\"left\">506<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,004 a 0,008<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">1\/4<\/td><td class=\"has-text-align-left\" data-align=\"left\">855<\/td><td class=\"has-text-align-left\" data-align=\"left\">982<\/td><td class=\"has-text-align-left\" data-align=\"left\">1028<\/td><td class=\"has-text-align-left\" data-align=\"left\">1620<\/td><td class=\"has-text-align-left\" data-align=\"left\">420<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,004 a 0,008<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">5\/16<\/td><td class=\"has-text-align-left\" data-align=\"left\">782<\/td><td class=\"has-text-align-left\" data-align=\"left\">806<\/td><td class=\"has-text-align-left\" data-align=\"left\">836<\/td><td class=\"has-text-align-left\" data-align=\"left\">1330<\/td><td class=\"has-text-align-left\" data-align=\"left\">342<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,005 a 0,010<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3\/8<\/td><td class=\"has-text-align-left\" data-align=\"left\">604<\/td><td class=\"has-text-align-left\" data-align=\"left\">688<\/td><td class=\"has-text-align-left\" data-align=\"left\">720<\/td><td class=\"has-text-align-left\" data-align=\"left\">1140<\/td><td class=\"has-text-align-left\" data-align=\"left\">295<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,005 a 0,010<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">7\/16<\/td><td class=\"has-text-align-left\" data-align=\"left\">527<\/td><td class=\"has-text-align-left\" data-align=\"left\">605<\/td><td class=\"has-text-align-left\" data-align=\"left\">632<\/td><td class=\"has-text-align-left\" data-align=\"left\">1003<\/td><td class=\"has-text-align-left\" data-align=\"left\">258<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,008 a 0,016<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">1\/2<\/td><td class=\"has-text-align-left\" data-align=\"left\">425<\/td><td class=\"has-text-align-left\" data-align=\"left\">488<\/td><td class=\"has-text-align-left\" data-align=\"left\">512<\/td><td class=\"has-text-align-left\" data-align=\"left\">807<\/td><td class=\"has-text-align-left\" data-align=\"left\">210<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,008 a 0,016<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">5\/8<\/td><td class=\"has-text-align-left\" data-align=\"left\">347<\/td><td class=\"has-text-align-left\" data-align=\"left\">410<\/td><td class=\"has-text-align-left\" data-align=\"left\">420<\/td><td class=\"has-text-align-left\" data-align=\"left\">668<\/td><td class=\"has-text-align-left\" data-align=\"left\">173<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,008 a 0,016<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">3\/4<\/td><td class=\"has-text-align-left\" data-align=\"left\">300<\/td><td class=\"has-text-align-left\" data-align=\"left\">346<\/td><td class=\"has-text-align-left\" data-align=\"left\">360<\/td><td class=\"has-text-align-left\" data-align=\"left\">566<\/td><td class=\"has-text-align-left\" data-align=\"left\">148<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,008 a 0,016<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">7\/8<\/td><td class=\"has-text-align-left\" data-align=\"left\">260<\/td><td class=\"has-text-align-left\" data-align=\"left\">298<\/td><td class=\"has-text-align-left\" data-align=\"left\">312<\/td><td class=\"has-text-align-left\" data-align=\"left\">495<\/td><td class=\"has-text-align-left\" data-align=\"left\">128<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,010 a 0,020<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">1<\/td><td class=\"has-text-align-left\" data-align=\"left\">228<\/td><td class=\"has-text-align-left\" data-align=\"left\">264<\/td><td class=\"has-text-align-left\" data-align=\"left\">276<\/td><td class=\"has-text-align-left\" data-align=\"left\">436<\/td><td class=\"has-text-align-left\" data-align=\"left\">112<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,010 a 0,020<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">1 1\/8<\/td><td class=\"has-text-align-left\" data-align=\"left\">215<\/td><td class=\"has-text-align-left\" data-align=\"left\">248<\/td><td class=\"has-text-align-left\" data-align=\"left\">260<\/td><td class=\"has-text-align-left\" data-align=\"left\">410<\/td><td class=\"has-text-align-left\" data-align=\"left\">106<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,010 a 0,020<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">1 1\/4<\/td><td class=\"has-text-align-left\" data-align=\"left\">200<\/td><td class=\"has-text-align-left\" data-align=\"left\">230<\/td><td class=\"has-text-align-left\" data-align=\"left\">238<\/td><td class=\"has-text-align-left\" data-align=\"left\">380<\/td><td class=\"has-text-align-left\" data-align=\"left\">98<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,010 a 0,020<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">1 3\/8<\/td><td class=\"has-text-align-left\" data-align=\"left\">178<\/td><td class=\"has-text-align-left\" data-align=\"left\">205<\/td><td class=\"has-text-align-left\" data-align=\"left\">216<\/td><td class=\"has-text-align-left\" data-align=\"left\">342<\/td><td class=\"has-text-align-left\" data-align=\"left\">92<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,010 a 0,020<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">1 1\/2<\/td><td class=\"has-text-align-left\" data-align=\"left\">154<\/td><td class=\"has-text-align-left\" data-align=\"left\">173<\/td><td class=\"has-text-align-left\" data-align=\"left\">180<\/td><td class=\"has-text-align-left\" data-align=\"left\">290<\/td><td class=\"has-text-align-left\" data-align=\"left\">73<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,010 a 0,020<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">2<\/td><td class=\"has-text-align-left\" data-align=\"left\">130<\/td><td class=\"has-text-align-left\" data-align=\"left\">150<\/td><td class=\"has-text-align-left\" data-align=\"left\">156<\/td><td class=\"has-text-align-left\" data-align=\"left\">246<\/td><td class=\"has-text-align-left\" data-align=\"left\">64<\/td><td class=\"has-text-align-left\" data-align=\"left\">0,010 a 0,020<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Fonte, velocidades e avan\u00e7os para brocas, p\u00e1gina impressa 249, e os fatores de velocidade de corte para uma opera\u00e7\u00e3o mais longa na p\u00e1gina impressa 241.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>As cinco velocidades s\u00e3o para uma broca helicoidal de a\u00e7o r\u00e1pido e os cabe\u00e7alhos das colunas s\u00e3o o material a ser furado, n\u00e3o o material da broca. Todos os valores s\u00e3o revolu\u00e7\u00f5es por minuto, e o avan\u00e7o \u00e9 dado por revolu\u00e7\u00e3o para uma broca de dois gumes. A tabela \u00e9 baseada em uma velocidade perif\u00e9rica de 60 a 65 p\u00e9s por minuto em a\u00e7o macio nos di\u00e2metros m\u00e9dios, e a velocidade perif\u00e9rica aumenta conforme o di\u00e2metro diminui. Sem lubrificante, as velocidades devem ser reduzidas em 15 a 20 por cento. O valor mais leve de cada par de avan\u00e7o \u00e9 o valor preferido, e o valor mais pesado \u00e9 utiliz\u00e1vel onde a m\u00e1quina e a montagem s\u00e3o r\u00edgidas. Para alargadores rosa, cossinetes de rosca e machos, cerca de metade das velocidades mostradas devem ser usadas. Apenas uma tabela de refer\u00eancia, n\u00e3o \u00e9 uma recomenda\u00e7\u00e3o da Aobo Steel, e os n\u00fameros devem ser lidos em rela\u00e7\u00e3o \u00e0 sua pr\u00f3pria m\u00e1quina, suporte e refrigerante.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O avan\u00e7o merece tanta aten\u00e7\u00e3o quanto a velocidade. A fonte \u00e9 expl\u00edcita que um avan\u00e7o muito leve \u00e9 o que encurta a vida da broca em trabalhos desse tipo, porque um cavaco muito fino \u00e9 pulverizado sob a aresta e o p\u00f3 ent\u00e3o desgasta a aresta de corte por tr\u00e1s. O avan\u00e7o citado para cada di\u00e2metro \u00e9 o valor que a broca precisa para formar um cavaco saud\u00e1vel, e uma broca suportar\u00e1 uma velocidade ligeiramente maior em um corte moderadamente pesado do que em um corte que remove quase nada. Em ferro fundido, a fonte registra 65 a 70 p\u00e9s por minuto como pr\u00e1tica satisfat\u00f3ria para um trabalho m\u00e9dio, com um avan\u00e7o por gume de 0,008 a 0,02 polegada dependendo do tamanho da broca e da rigidez da m\u00e1quina.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A quebra da broca \u00e9 mais frequentemente um problema de m\u00e1quina do que um problema de velocidade. A fonte registra que a falha frequente de uma broca justamente quando a ponta atravessa o lado oposto da pe\u00e7a, geralmente atribu\u00edda \u00e0 alta velocidade ou ao avan\u00e7o pesado, \u00e9 na verdade folga e flexibilidade na m\u00e1quina, e que o rem\u00e9dio \u00e9 refor\u00e7ar a montagem em vez de reduzir a velocidade da broca. Essa leitura ainda se aplica em uma furadeira de bancada ou em um torno com rolamentos do fuso desgastados, e \u00e9 a raz\u00e3o pela qual uma broca que sobrevive em uma m\u00e1quina falha na seguinte.<\/p>\n\n\n\n<h2 id=\"h-trading-cutting-speed-for-a-longer-run-between-regrinds\" class=\"wp-block-heading\">Trocando velocidade de corte por uma opera\u00e7\u00e3o mais longa entre reafiamentos<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A vida da ferramenta \u00e9 comprada com velocidade de corte. Os fatores abaixo s\u00e3o adaptados do trabalho de Taylor e levam uma broca de um reafiamento ao pr\u00f3ximo. Eles s\u00e3o usados em uma dire\u00e7\u00e3o de cada vez. Uma broca ajustada para cortar por 20 minutos entre reafiamentos operar\u00e1 por 40 minutos se a velocidade tabelada for dividida por 1,09, e por 80 minutos se for dividida por 1,19. Lido ao contr\u00e1rio, os mesmos n\u00fameros multiplicam a velocidade e encurtam a opera\u00e7\u00e3o, que \u00e9 o que uma oficina faz em um trabalho que precisa sair da m\u00e1quina hoje.<\/p>\n\n\n\n<h3 id=\"h-factors-that-carry-a-tabulated-speed-to-a-longer-run\" class=\"wp-block-heading\">Fatores que levam uma velocidade tabelada a uma opera\u00e7\u00e3o mais longa<\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Velocidade j\u00e1 ajustada para um corte com dura\u00e7\u00e3o de<\/th><th class=\"has-text-align-left\" data-align=\"left\">Velocidade buscada para um corte com dura\u00e7\u00e3o de<\/th><th class=\"has-text-align-left\" data-align=\"left\">Divida a velocidade tabelada por<\/th><th class=\"has-text-align-left\" data-align=\"left\">ou multiplique-a por<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">20 minutos<\/td><td class=\"has-text-align-left\" data-align=\"left\">40 minutos<\/td><td class=\"has-text-align-left\" data-align=\"left\">1.09<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.92<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">40 minutos<\/td><td class=\"has-text-align-left\" data-align=\"left\">80 minutos<\/td><td class=\"has-text-align-left\" data-align=\"left\">1.09<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.92<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">20 minutos<\/td><td class=\"has-text-align-left\" data-align=\"left\">80 minutos<\/td><td class=\"has-text-align-left\" data-align=\"left\">1.19<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.84<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">40 minutos<\/td><td class=\"has-text-align-left\" data-align=\"left\">20 minutos<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.92<\/td><td class=\"has-text-align-left\" data-align=\"left\">1.09<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">80 minutos<\/td><td class=\"has-text-align-left\" data-align=\"left\">40 minutos<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.92<\/td><td class=\"has-text-align-left\" data-align=\"left\">1.09<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">80 minutos<\/td><td class=\"has-text-align-left\" data-align=\"left\">20 minutos<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.84<\/td><td class=\"has-text-align-left\" data-align=\"left\">1.19<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Fonte, fatores de velocidade de corte para uma opera\u00e7\u00e3o mais longa entre reafiamentos, p\u00e1gina impressa 241, adaptado de Taylor.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Os fatores s\u00e3o adaptados de Taylor e levam a opera\u00e7\u00e3o de uma broca de um reafiamento ao pr\u00f3ximo. Dividir a velocidade tabelada faz o corte durar mais e multiplic\u00e1-la faz o corte durar menos, ent\u00e3o as duas dire\u00e7\u00f5es s\u00e3o o mesmo fator lido de formas opostas. O par do meio leva a opera\u00e7\u00e3o diretamente de vinte minutos para oitenta minutos, que \u00e9 um corte mais lento do que a mudan\u00e7a em duas etapas atrav\u00e9s de quarenta minutos.<\/em><\/p>\n\n\n\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-3e4fb3d2 wp-block-group-is-layout-constrained\" style=\"border-radius:8px;background-color:#f4f8ff;margin-bottom:24px;padding-top:20px;padding-right:24px;padding-bottom:20px;padding-left:24px\">\n<p class=\"wp-block-paragraph\"><strong>Tabela de velocidades e avan\u00e7os para brocas de a\u00e7o r\u00e1pido, PDF para impress\u00e3o<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A tabela de velocidades e avan\u00e7os para brocas, os fatores de vida da ferramenta e os dois ajustes que os levam ao ch\u00e3o de f\u00e1brica em um PDF, com nossos dados de contato.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/09\/Aobo-Steel-HSS-Drill-Speeds-and-Feeds-Chart.pdf\">Baixar PDF, 409 KB<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 id=\"h-related-reference-data\" class=\"wp-block-heading\">Dados de refer\u00eancia relacionados<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Os graus com os quais esta tabela \u00e9 usada est\u00e3o reunidos na <a href=\"https:\/\/aobosteel.com\/pt\/high-speed-steels\/\">cat\u00e1logo de a\u00e7os r\u00e1pidos<\/a>, com o M2 apresentado na <a href=\"https:\/\/aobosteel.com\/pt\/m2-tool-steel\/\">p\u00e1gina do a\u00e7o para ferramentas M2<\/a> e a sele\u00e7\u00e3o para trabalho de corte na <a href=\"https:\/\/aobosteel.com\/pt\/selection-guide-high-speed-steel-hss-cutting-tools\/\">guia de sele\u00e7\u00e3o de a\u00e7o r\u00e1pido para ferramentas de corte<\/a>. As velocidades de torneamento e fresamento para os graus de a\u00e7o ferramenta est\u00e3o na <a href=\"https:\/\/aobosteel.com\/pt\/tool-steel-cutting-speeds-and-feeds\/\">p\u00e1gina de velocidades e avan\u00e7os de corte para a\u00e7os ferramenta<\/a>, e a classifica\u00e7\u00e3o que decide como um grau \u00e9 usinado est\u00e1 na <a href=\"https:\/\/aobosteel.com\/pt\/tool-steel-machinability-rating-chart\/\">Tabela de classifica\u00e7\u00e3o de usinabilidade do a\u00e7o ferramenta<\/a>. Os tamanhos de furo para roscamento est\u00e3o na <a href=\"https:\/\/aobosteel.com\/pt\/tap-drill-size-chart\/\">tabela de tamanhos de broca de rosca<\/a>, e as velocidades para um grau espec\u00edfico de trabalho a frio s\u00e3o detalhadas no <a href=\"https:\/\/aobosteel.com\/pt\/a2-tool-steel-machining-fabrication-guide\/\">Guia de usinagem e fabrica\u00e7\u00e3o do a\u00e7o ferramenta A2<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dados de refer\u00eancia compilados de High-speed Steel (Otto Matthew Becker, McGraw-Hill, 1916). A tabela de brocas est\u00e1 impressa na p\u00e1gina 249 dessa edi\u00e7\u00e3o e os fatores de velocidade de corte na p\u00e1gina 241. Ambos foram lidos da imagem da p\u00e1gina e n\u00e3o de uma camada de texto autom\u00e1tica.<\/p>","protected":false},"excerpt":{"rendered":"<p>High-Speed Steel Drill Speeds and Feeds Chart Revolutions per minute and feed per revolution for high speed steel twist drills, by drill diameter and by the material being drilled, with the factors that trade cutting speed against the time a drill runs between regrinds. 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[&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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