{"id":2530,"date":"2026-03-09T08:24:00","date_gmt":"2026-03-09T00:24:00","guid":{"rendered":"https:\/\/www.takebrakes.com\/?p=2530"},"modified":"2026-02-24T17:27:51","modified_gmt":"2026-02-24T09:27:51","slug":"how-to-calculate-industrial-brake-torque","status":"publish","type":"post","link":"https:\/\/www.takebrakes.com\/pt\/how-to-calculate-industrial-brake-torque\/","title":{"rendered":"Como Calcular o Torque de Travagem Industrial: Fatores de Seguran\u00e7a, In\u00e9rcia e Regras de Sele\u00e7\u00e3o para Guindastes e Transportadores"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Selecionar um trav\u00e3o industrial n\u00e3o \u00e9 apenas escolher um modelo que \u201cpare\u00e7a grande o suficiente\u201d. Se subdimensionar o torque, a carga ir\u00e1 deslizar ou cair. Se sobredimensionar, ir\u00e1 partir eixos, raspar dentes de engrenagem e danificar estruturas com choques de paragem brutais.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This article provides the <strong>engineering formulas<\/strong> e <strong>safety factors (K-factors)<\/strong> needed to size brakes correctly for hoists, travel drives, and belt conveyors. We will connect these calculations to our product lines, such as <a href=\"https:\/\/www.takebrakes.com\/pt\/ywz13-series-electric-hydraulic-drum-brake\/\"><strong>YWZ13 drum brakes<\/strong><\/a> for general crane duty and <a href=\"https:\/\/www.takebrakes.com\/pt\/sh-series-hydraulic-fail-safe-disc-brakes\/\"><strong>SH fail-safe disc brakes<\/strong><\/a> for high-energy holding.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Infogr\u00e1fico mostrando as entradas da f\u00f3rmula: Pot\u00eancia do motor (P), Velocidade (n) e Fator de Seguran\u00e7a (K).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-1-the-fundamental-torque-formula\">1) A F\u00f3rmula Fundamental do Torque<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Comece com o torque est\u00e1tico necess\u00e1rio para segurar a pot\u00eancia nominal do motor. A equa\u00e7\u00e3o que governa \u00e9:<\/p>\n\n\n<span class=\"katex-eq\" data-katex-display=\"true\">T_{est\u00e1tico} = \\frac{9550 \\times P}{n}<\/span>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>$T_{est\u00e1tico}$:<\/strong> Torque do motor nominal (N\u00b7m)<\/li>\n\n\n\n<li><strong>$P$:<\/strong> Pot\u00eancia do motor (kW)<\/li>\n\n\n\n<li><strong>$n$:<\/strong> Velocidade do eixo do trav\u00e3o (rpm) \u2014 <em>Crucial: Esta \u00e9 a velocidade no trav\u00e3o, n\u00e3o a sa\u00edda da caixa de engrenagens!<\/em><\/li>\n\n\n\n<li><strong>9550:<\/strong> Convers\u00e3o constante de kW\/rpm para N\u00b7m.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Exemplo:<\/strong> A 45 kW motor running at 750 rpm (common for crane hoists):<\/p>\n\n\n<span class=\"katex-eq\" data-katex-display=\"true\">T_{est\u00e1tico} = \\frac{9550 \\times 45}{750} = 573\\ \\text{N\u00b7m}<\/span>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Note: This is just to hold the motor against its own rating. It does not account for gravity, safety, or dynamic stopping.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-2-applying-the-safety-factor-k\">2) Aplicando o Fator de Seguran\u00e7a ($K$)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">You never select a brake at $T_{static}$. You apply a <strong>Service Factor ($K$)<\/strong> based on the risk and application type.<\/p>\n\n\n<span class=\"katex-eq\" data-katex-display=\"true\">T_{freio} \\ge T_{est\u00e1tico} \\times K<\/span>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Aplica\u00e7\u00e3o<\/th><th>Fator $K$ recomendado<\/th><th>Porqu\u00ea?<\/th><\/tr><\/thead><tbody><tr><td><strong>Eleva\u00e7\u00e3o (Levantamento)<\/strong><\/td><td><strong>$K \\ge 2.0$<\/strong> (Frequentemente 2.5 para metal fundido)<\/td><td>A gravidade \u00e9 constante. Se a fric\u00e7\u00e3o diminuir (desgaste\/fadiga), \u00e9 necess\u00e1rio 100% de capacidade de reserva para evitar uma queda.<\/td><\/tr><tr><td><strong>Deslocamento \/ Travessia<\/strong><\/td><td><strong>$K \\approx 1.5 \u2013 2.0$<\/strong><\/td><td>Para parar dentro dos limites de vento, mas evitar escorregamento das rodas. Torque excessivo ($K&gt;2.5$) causa bloqueio das rodas e desgaste do carril.<\/td><\/tr><tr><td><strong>Transportadores de correia<\/strong><\/td><td><strong>$K \\approx 1.5 \u2013 2.0$<\/strong><\/td><td>Previne o retrocesso em correias inclinadas. A capacidade t\u00e9rmica (tempo de paragem) \u00e9 muitas vezes mais cr\u00edtica do que o torque.<\/td><\/tr><tr><td><strong>Guinchos (Operador a bordo)<\/strong><\/td><td><strong>$K \\ge 3.0$<\/strong> (Freios duplos frequentemente necess\u00e1rios)<\/td><td>Requisito de seguran\u00e7a extremo.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Applying to our Example (Hoist):<\/strong>\n<br>Required Brake Torque = $573\\ \\text{N\u00b7m} \\times 2.0 = 1146\\ \\text{N\u00b7m}$.\n<br>You would select a brake rated for at least <strong>1200 N\u00b7m<\/strong> (e.g., a YWZ13-315 or YWZ13-400 model depending on thruster).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-3-thermal-capacity-the-hidden-killer\">3) Capacidade T\u00e9rmica: O Assassino Oculto<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Calculated torque ensures you can <em>hold<\/em> the load. But can you <em>stop<\/em> it without burning the linings?<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-stopping-energy-calculation\">C\u00e1lculo de Energia de Paragem<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sempre que para, a energia cin\u00e9tica transforma-se em calor.\n<br>Energia ($E$) por paragem (Joules):<\/p>\n\n\n<span class=\"katex-eq\" data-katex-display=\"true\">E = \\frac{1}{2} J \\omega^2<\/span>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>$J$:<\/strong> In\u00e9rcia total do sistema refletida no eixo do trav\u00e3o (kg\u00b7m\u00b2).<\/li>\n\n\n\n<li><strong>$\\omega$:<\/strong> Velocidade angular (rad\/s) = $rpm \\times \\frac{2\\pi}{60}$.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If $E$ exceeds the brake&#8217;s thermal rating (kJ per hour), the linings will glaze and fade.\n<br><strong>Regra Geral:<\/strong> For high-inertia loads (conveyors, large fans), verify the <strong>thermal capacity<\/strong> of the disc\/drum, not just the torque. You may need a <strong>ventilated disc<\/strong> (<a href=\"https:\/\/www.takebrakes.com\/pt\/sh-series-hydraulic-fail-safe-disc-brakes\/\">SH series<\/a>) or a larger drum size just to dissipate heat.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-4-stopping-time-check\">4) Verifica\u00e7\u00e3o do Tempo de Paragem<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A m\u00e1quina vai parar r\u00e1pido o suficiente?\n<br>Tempo de Desacelera\u00e7\u00e3o ($t$):<\/p>\n\n\n<span class=\"katex-eq\" data-katex-display=\"true\">t = \\frac{J \\times n}{9.55 \\times (T_{freio} \\pm T_{carga})}<\/span>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>$T_{freio}$:<\/strong> Configura\u00e7\u00e3o real do torque.<\/li>\n\n\n\n<li><strong>$T_{carga}$:<\/strong> Torque de carga a ajudar ( ) ou resistir (-) \u00e0 paragem.<\/li>\n\n\n\n<li><strong>Resultado:<\/strong> Se $t$ for demasiado longo (&gt; 3-5s para cabos de eleva\u00e7\u00e3o), a seguran\u00e7a fica comprometida. Se for demasiado curto (&lt; 0.5s para deslocamentos), cargas de choque ir\u00e3o quebrar componentes.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-5-selecting-the-right-brake-series\">5) Sele\u00e7\u00e3o da S\u00e9rie de Trav\u00f5es Adequada<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Depois de obter os n\u00fameros, escolha o hardware:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>S\u00e9rie<\/th><th>Tipo<\/th><th>Faixa de Torque<\/th><th>Melhor Para<\/th><\/tr><\/thead><tbody><tr><td><a href=\"https:\/\/www.takebrakes.com\/pt\/ywz13-series-electric-hydraulic-drum-brake\/\"><strong>YWZ13 \/ YWZ<\/strong><\/a><\/td><td>Tambor Eletro-Hidr\u00e1ulico<\/td><td>100 \u2013 12.500 N\u00b7m<\/td><td><strong>Guindastes Gerais:<\/strong> Pontes EOT, pontes rolantes, eleva\u00e7\u00e3o geral. Robusto, f\u00e1cil de manter.<\/td><\/tr><tr><td><a href=\"https:\/\/www.takebrakes.com\/pt\/sh-series-hydraulic-fail-safe-disc-brakes\/\"><strong>SH \/ SB<\/strong><\/a><\/td><td>Disco Hidr\u00e1ulico<\/td><td>500 \u2013 30.000  N\u00b7m<\/td><td><strong>De Alta resist\u00eancia:<\/strong> Paragens de alta velocidade, transportadores, guindastes de contentores. Melhor dissipa\u00e7\u00e3o t\u00e9rmica.<\/td><\/tr><tr><td><a href=\"https:\/\/www.takebrakes.com\/pt\/se-series-electromagnetic-fail-safe-brake\/\"><strong>SE \/ DC<\/strong><\/a><\/td><td>Disco Electromagn\u00e9tico<\/td><td>5 \u2013 500 N\u00b7m<\/td><td><strong>Precis\u00e3o\/Pequeno:<\/strong> Ferramentas de m\u00e1quinas, encena\u00e7\u00e3o de palco, pequenos guinchos. Resposta r\u00e1pida.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-6-common-selection-pitfalls\">6) Armadilhas comuns na sele\u00e7\u00e3o<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ignorando a Efici\u00eancia da Caixa de Engrenagens:<\/strong> Se a travagem estiver no eixo de alta velocidade, o arrasto da caixa de engrenagens ajuda a parar. Se estiver no eixo de baixa velocidade (travagem de seguran\u00e7a), n\u00e3o ajuda.<\/li>\n\n\n\n<li><strong>Sobretorque em acionamentos de deslocamento:<\/strong> Selecionar $K=3.0$ para um acionamento de ponte de guindaste garante escorregamento das rodas e cargas oscilantes. Use $K=1.5$ ou um trav\u00e3o de torque vari\u00e1vel.<\/li>\n\n\n\n<li><strong>Desajuste de Tens\u00e3o:<\/strong> Calcular o torque perfeitamente, mas encomendar a voltagem errada do propulsor (380V vs 415V vs 460V) faz com que o projeto fique parado na instala\u00e7\u00e3o.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-need-help-sizing-your-brake\">Precisa de ajuda para dimensionar o seu trav\u00e3o?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Pare de adivinhar. Envie-nos a pot\u00eancia do seu motor (kW), velocidade (rpm) e tipo de aplica\u00e7\u00e3o (guincho\/deslocamento). A nossa equipa de engenharia far\u00e1 o c\u00e1lculo, recomendar\u00e1 o Fator de Seguran\u00e7a ($K$) correto e selecionar\u00e1 o modelo de trav\u00e3o ideal para o seu projeto.<\/p>","protected":false},"excerpt":{"rendered":"<p>Selecting an industrial brake isn&#8217;t just about picking a model that &#8220;looks big enough.&#8221; If you undersize the torque, the load will drift or drop. If you oversize it, you&#8217;ll snap shafts, strip gear teeth, and damage structures with brutal stop shocks. This article provides the engineering formulas and safety factors (K-factors) needed to size [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5,3],"tags":[],"class_list":["post-2530","post","type-post","status-publish","format-standard","hentry","category-info","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/posts\/2530","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/comments?post=2530"}],"version-history":[{"count":1,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/posts\/2530\/revisions"}],"predecessor-version":[{"id":2531,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/posts\/2530\/revisions\/2531"}],"wp:attachment":[{"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/media?parent=2530"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/categories?post=2530"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/tags?post=2530"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}