{"id":100276,"date":"2026-02-15T20:31:30","date_gmt":"2026-02-15T20:31:30","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100276"},"modified":"2026-02-15T20:31:30","modified_gmt":"2026-02-15T20:31:30","slug":"v-belt-calculator","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/bn\/calculators\/v-belt-calculator\/","title":{"rendered":"V-\u09ac\u09c7\u09b2\u09cd\u099f \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8 \u0995\u09cd\u09af\u09be\u09b2\u0995\u09c1\u09b2\u09c7\u099f\u09b0 | ISO 5288 | \u09ac\u09bf\u09a8\u09be\u09ae\u09c2\u09b2\u09cd\u09af\u09c7 \u0985\u09a8\u09b2\u09be\u0987\u09a8 \u099f\u09c1\u09b2"},"content":{"rendered":"\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"V-Belt Selection Calculator\",\"alternateName\":[\"V-Belt Calculator\",\"Belt Cross-Section Calculator\",\"ISO 5288 Belt Calculator\"],\"description\":\"Free V-belt selection calculator per ISO 5288. Calculate belt cross-section and number of belts needed.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/v-belt-calculator\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any (Web Browser)\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2024-01-01\",\"dateModified\":\"2025-02-14\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true,\"featureList\":[\"Classical and narrow V-belt profiles\",\"Service factor selection\",\"Power rating per belt\",\"Number of belts calculation\",\"Cross-section recommendation\",\"Auto-calculation\"],\"keywords\":\"V-belt, ISO 5288, belt selection, SPZ, SPA, SPB, SPC\"}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"How do I select the right V-belt cross-section?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"V-belt cross-section is selected based on design power (power \u00d7 service factor) and the speed of the faster shaft. Use selection charts: Z\/SPZ for up to ~4 kW, A\/SPA for ~2-20 kW, B\/SPB for ~5-60 kW, C\/SPC for ~15-150 kW, D for ~50-500 kW.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the difference between classical and narrow V-belts?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Classical V-belts (Z, A, B, C, D) have a wider profile. Narrow V-belts (SPZ, SPA, SPB, SPC) transmit more power per belt and per unit width. Narrow belts are preferred for new designs due to higher power density and efficiency.\"}},\n{\"@type\":\"Question\",\"name\":\"How do I calculate the number of belts needed?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Number of belts = Design Power \/ (Power per belt \u00d7 Correction factors). Correction factors include wrap angle factor (C1), belt length factor (C3), and number-of-belts factor. Round up to the nearest whole number.\"}},\n{\"@type\":\"Question\",\"name\":\"What service factors apply to V-belt drives?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Service factors for V-belts: 1.0-1.2 for uniform loads (fans, pumps), 1.1-1.3 for light shocks, 1.2-1.4 for moderate shocks, 1.3-1.8 for heavy shocks. Multiply by 1.2 for more than 10 hours\/day operation.\"}},\n{\"@type\":\"Question\",\"name\":\"What is the maximum recommended V-belt speed?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Maximum recommended belt speed: 25-30 m\/s for classical V-belts, up to 40 m\/s for narrow V-belts. Above these speeds, centrifugal forces significantly reduce belt capacity and special high-speed belts should be used.\"}}\n]}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[\n{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vibromera.eu\/\"},\n{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Calculators\",\"item\":\"https:\/\/vibromera.eu\/calculators\/\"},\n{\"@type\":\"ListItem\",\"position\":3,\"name\":\"V-Belt Selection Calculator\",\"item\":\"https:\/\/vibromera.eu\/calculators\/v-belt-calculator\/\"}\n]}\n<\/script>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n\n<link 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16px;font-size:13px;color:var(--vc-ink-muted)}.vc-footer a{color:var(--vc-accent);text-decoration:none}.vc-footer a:hover{text-decoration:underline}.vc-footer-links{margin-top:8px;font-size:12px}.vc-footer-links a{margin:0 8px}\n@media print{.vc-section-body{max-height:none!important}.vc-faq-a{max-height:none!important}.vc-results{max-height:none!important;padding:24px!important}.vc-copy-btn,.vc-section-chevron,.vc-faq-chevron,.vc-presets,.vc-promo{display:none!important}}\n<\/style>\n\n<div class=\"vc-calculator\" id=\"vc-v-belt\">\n\n<header class=\"vc-header\">\n    <p class=\"vc-header-eyebrow\">Free Engineering Tool #088<\/p>\n    <h1 class=\"vc-header-title\">V-Belt Selection Calculator<\/h1>\n    <p class=\"vc-header-subtitle\">Select V-belt cross-section and calculate the number of belts needed per ISO 5288. Enter power, speed, service factor, and pulley diameter.<\/p>\n    <div class=\"vc-badges\">\n        <span class=\"vc-badge\">ISO 5288<\/span>\n        <span class=\"vc-badge\">Z\/A\/B\/C\/D<\/span>\n        <span class=\"vc-badge\">SPZ\/SPA\/SPB\/SPC<\/span>\n    <\/div>\n<\/header>\n\n<div class=\"vc-card\">\n    <form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\">\n        <div class=\"vc-form-grid\">\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-power\">Power <span class=\"vc-label-hint\">(kW)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-power\" inputmode=\"decimal\" step=\"any\" min=\"0.1\" placeholder=\"e.g. 15\" value=\"15\">\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-speed\">Faster Shaft Speed <span class=\"vc-label-hint\">(RPM)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-speed\" inputmode=\"decimal\" step=\"any\" min=\"1\" placeholder=\"e.g. 1500\" value=\"1500\">\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-sf\">Service Factor<\/label>\n                <select class=\"vc-select\" id=\"vc-sf\">\n                    <option value=\"1.0\">1.0 \u2014 Uniform (\u226410 h\/day)<\/option>\n                    <option value=\"1.1\">1.1 \u2014 Uniform (10\u201316 h\/day)<\/option>\n                    <option value=\"1.2\" selected>1.2 \u2014 Light shocks<\/option>\n                    <option value=\"1.3\">1.3 \u2014 Moderate shocks<\/option>\n                    <option value=\"1.5\">1.5 \u2014 Heavy shocks<\/option>\n                    <option value=\"1.8\">1.8 \u2014 Very heavy shocks<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-d1\">Small Pulley Diameter <span class=\"vc-label-hint\">(mm)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-d1\" inputmode=\"decimal\" step=\"any\" min=\"40\" placeholder=\"e.g. 125\" value=\"125\">\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-profile\">Belt Profile<\/label>\n                <select class=\"vc-select\" id=\"vc-profile\">\n                    <option value=\"Z\">Z \u2014 Classical (top width 10 mm)<\/option>\n                    <option value=\"A\">A \u2014 Classical (top width 13 mm)<\/option>\n                    <option value=\"B\" selected>B \u2014 Classical (top width 17 mm)<\/option>\n                    <option value=\"C\">C \u2014 Classical (top width 22 mm)<\/option>\n                    <option value=\"D\">D \u2014 Classical (top width 32 mm)<\/option>\n                    <option value=\"SPZ\">SPZ \u2014 Narrow (top width 9.7 mm)<\/option>\n                    <option value=\"SPA\">SPA \u2014 Narrow (top width 12.7 mm)<\/option>\n                    <option value=\"SPB\">SPB \u2014 Narrow (top width 16.3 mm)<\/option>\n                    <option value=\"SPC\">SPC \u2014 Narrow (top width 22 mm)<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-ratio\">Speed Ratio <span class=\"vc-label-hint\">(D\u2082\/D\u2081)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-ratio\" inputmode=\"decimal\" step=\"any\" min=\"1\" placeholder=\"e.g. 2\" value=\"2\">\n            <\/div>\n        <\/div>\n\n        <div class=\"vc-presets\">\n            <div class=\"vc-presets-label\">Quick presets<\/div>\n            <button type=\"button\" class=\"vc-preset-btn\" data-p=\"3\" data-s=\"1440\" data-sf=\"1.2\" data-d=\"80\" data-pr=\"SPZ\" data-r=\"2\">Fan 3 kW \/ SPZ<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-p=\"15\" data-s=\"1500\" data-sf=\"1.2\" data-d=\"125\" data-pr=\"B\" data-r=\"2\">Pump 15 kW \/ B<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-p=\"45\" data-s=\"1500\" data-sf=\"1.3\" data-d=\"200\" data-pr=\"SPB\" data-r=\"3\">Compressor 45 kW \/ SPB<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-p=\"110\" data-s=\"1000\" data-sf=\"1.5\" data-d=\"250\" data-pr=\"SPC\" data-r=\"4\">Crusher 110 kW \/ SPC<\/button>\n        <\/div>\n    <\/form>\n\n    <div class=\"vc-results\" id=\"vc-results\">\n        <div class=\"vc-results-head\">\n            <h2 class=\"vc-results-title\">Results<\/h2>\n            <button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\"><svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy<\/button>\n        <\/div>\n        <div class=\"vc-result-grid\">\n            <div class=\"vc-rcard vc-rcard-primary\">\n                <div class=\"vc-rcard-label\">Number of Belts Required<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-nbelts\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Design Power (P<sub>d<\/sub>)<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-pd\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Power Per Belt (P<sub>b<\/sub>)<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-pb\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Recommended Profile<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-rec\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Belt Speed<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-speed\">\u2014<\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"vc-section vc-open\" id=\"vc-sec-theory\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udcd8<\/span><span class=\"vc-section-title\">Theory &amp; Formulas<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner vc-theory\">\n            <h3>Design Power<\/h3>\n            <div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n            <h3>Number of Belts<\/h3>\n            <div class=\"vc-formula-box\" id=\"vc-katex-2\"><\/div>\n            <p>Where C\u2081 is wrap angle factor, C\u2083 is belt length factor, and P<sub>b<\/sub> is the basic power rating per belt.<\/p>\n\n            <h3>V-Belt Cross-Section Selection Guide<\/h3>\n            <table class=\"vc-table\">\n                <thead><tr><th>Profile<\/th><th>Type<\/th><th>Top Width<\/th><th>Power Range (typical)<\/th><th>Min Pulley \u2300<\/th><\/tr><\/thead>\n                <tbody>\n                    <tr><td>Z<\/td><td>Classical<\/td><td>10 mm<\/td><td>0.2 \u2013 4 kW<\/td><td>50 mm<\/td><\/tr>\n                    <tr><td>A<\/td><td>Classical<\/td><td>13 mm<\/td><td>0.5 \u2013 15 kW<\/td><td>75 mm<\/td><\/tr>\n                    <tr><td>B<\/td><td>Classical<\/td><td>17 mm<\/td><td>2 \u2013 55 kW<\/td><td>125 mm<\/td><\/tr>\n                    <tr><td>C<\/td><td>Classical<\/td><td>22 mm<\/td><td>10 \u2013 150 kW<\/td><td>200 mm<\/td><\/tr>\n                    <tr><td>D<\/td><td>Classical<\/td><td>32 mm<\/td><td>40 \u2013 500 kW<\/td><td>355 mm<\/td><\/tr>\n                    <tr><td>SPZ<\/td><td>Narrow<\/td><td>9.7 mm<\/td><td>0.5 \u2013 8 kW<\/td><td>63 mm<\/td><\/tr>\n                    <tr><td>SPA<\/td><td>Narrow<\/td><td>12.7 mm<\/td><td>1.5 \u2013 30 kW<\/td><td>90 mm<\/td><\/tr>\n                    <tr><td>SPB<\/td><td>Narrow<\/td><td>16.3 mm<\/td><td>5 \u2013 80 kW<\/td><td>140 mm<\/td><\/tr>\n                    <tr><td>SPC<\/td><td>Narrow<\/td><td>22 mm<\/td><td>20 \u2013 250 kW<\/td><td>224 mm<\/td><\/tr>\n                <\/tbody>\n            <\/table>\n\n            <div class=\"vc-info-box\"><p><strong>Tip:<\/strong> Narrow V-belts (SPZ, SPA, SPB, SPC) offer 30\u201350% more power capacity per belt than classical sections and are recommended for new designs.<\/p><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"vc-section\" id=\"vc-sec-related\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udd17<\/span><span class=\"vc-section-title\">Related Calculators<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-related\">\n        <a class=\"vc-related-link\" href=\"\/calculators\/belt-drive-calculator\/\">Belt Drive Calculator<\/a>\n        <a class=\"vc-related-link\" href=\"\/calculators\/timing-belt-calculator\/\">Timing Belt Calculator<\/a>\n        <a class=\"vc-related-link\" href=\"\/calculators\/chain-drive-calculator\/\">Chain Drive Calculator<\/a>\n        <a class=\"vc-related-link\" href=\"\/calculators\/drive-efficiency-calculator\/\">Drive Efficiency Calculator<\/a>\n    <\/div><\/div><\/div>\n<\/div>\n\n<div class=\"vc-section\" id=\"vc-sec-faq\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\u2753<\/span><span class=\"vc-section-title\">Frequently Asked Questions<\/span><\/span><svg class=\"vc-section-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-faq-list\" id=\"vc-faq-list\"><\/div><\/div><\/div>\n<\/div>\n\n<div class=\"vc-promo\"><div class=\"vc-promo-text\"><strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>Professional field balancing instruments and software. Used in 50+ countries.<\/div><a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a><\/div>\n<footer class=\"vc-footer\"><p>\u00a9 2024\u20132025 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u2014 Engineering Calculators<\/p><p style=\"font-size:12px;margin-top:4px;\">Based on ISO 5288. Last updated: February 2025<\/p><div class=\"vc-footer-links\"><a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a><a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a><\/div><\/footer>\n\n<\/div>\n\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.js\"><\/script>\n<script>\n(function(){\n    'use strict';\n    var SLUG='v-belt-calculator';\n    function $(id){return document.getElementById(id)}\n    function fmt(n,d){if(isNaN(n)||!isFinite(n))return '\u2014';var f=n.toFixed(d===undefined?2:d);return f.replace(\/(\\.\\d*?)0+$\/,'$1').replace(\/\\.$\/,'')}\n\n    \/\/ Approximate basic power ratings per belt at 1500 RPM (kW) - simplified reference values\n    var beltPower={\n        Z:{pb:1.0,rec:[0,4]},A:{pb:2.8,rec:[0,15]},B:{pb:5.5,rec:[2,55]},C:{pb:12,rec:[10,150]},D:{pb:30,rec:[40,500]},\n        SPZ:{pb:2.0,rec:[0,8]},SPA:{pb:5.0,rec:[1.5,30]},SPB:{pb:10,rec:[5,80]},SPC:{pb:20,rec:[20,250]}\n    };\n\n    function recommendProfile(Pd){\n        var profiles=['SPZ','SPA','SPB','SPC'];\n        for(var i=0;i<profiles.length;i++){\n            var p=profiles[i];\n            if(Pd<=beltPower[p].rec[1]) return p;\n        }\n        return 'SPC';\n    }\n\n    function calculate(){\n        var P=parseFloat($('vc-power').value);\n        var n=parseFloat($('vc-speed').value);\n        var sf=parseFloat($('vc-sf').value);\n        var d1=parseFloat($('vc-d1').value);\n        var profile=$('vc-profile').value;\n        var ratio=parseFloat($('vc-ratio').value)||1;\n        if(!P||P<=0||!n||n<=0||!d1||d1<=0){$('vc-results').classList.remove('vc-visible');return}\n\n        var Pd=P*sf;\n        var beltSpeed=Math.PI*d1*n\/60000;\n        var bp=beltPower[profile];\n        \/\/ Adjust power rating by speed factor (simplified)\n        var speedFactor=n\/1500;\n        if(speedFactor>1)speedFactor=Math.sqrt(speedFactor);\n        var Pb=bp.pb*speedFactor;\n        \/\/ Wrap angle correction (approximate for ratio)\n        var wrapFactor=ratio<=1.5?1.0:(ratio<=2?0.95:(ratio<=3?0.90:0.85));\n        var Pbcorr=Pb*wrapFactor;\n        var nBelts=Math.ceil(Pd\/Pbcorr);\n        if(nBelts<1)nBelts=1;\n\n        var rec=recommendProfile(Pd);\n\n        $('vc-r-nbelts').innerHTML=nBelts+' <span class=\"vc-rcard-unit\">\u00d7 '+profile+'<\/span>';\n        $('vc-r-pd').innerHTML=fmt(Pd,1)+' <span class=\"vc-rcard-unit\">kW<\/span>';\n        $('vc-r-pb').innerHTML=fmt(Pbcorr,2)+' <span class=\"vc-rcard-unit\">kW\/belt<\/span>';\n        $('vc-r-rec').innerHTML='<span style=\"color:var(--vc-accent)\">'+rec+'<\/span> <span class=\"vc-rcard-unit\">(narrow V-belt)<\/span>';\n        $('vc-r-speed').innerHTML=fmt(beltSpeed,1)+' <span class=\"vc-rcard-unit\">m\/s<\/span>'+(beltSpeed>30?' <span class=\"vc-rcard-unit\" style=\"color:var(--vc-red)\">\u26a0 High<\/span>':'');\n\n        $('vc-results').classList.add('vc-visible');\n    }\n\n    document.querySelectorAll('.vc-preset-btn').forEach(function(btn){\n        btn.addEventListener('click',function(e){\n            e.preventDefault();\n            $('vc-power').value=this.getAttribute('data-p');\n            $('vc-speed').value=this.getAttribute('data-s');\n            $('vc-sf').value=this.getAttribute('data-sf');\n            $('vc-d1').value=this.getAttribute('data-d');\n            $('vc-profile').value=this.getAttribute('data-pr');\n            $('vc-ratio').value=this.getAttribute('data-r');\n            calculate();\n        });\n    });\n\n    $('vc-form').addEventListener('input',calculate);\n    $('vc-form').addEventListener('change',calculate);\n\n    $('vc-copy-btn').addEventListener('click',function(){\n        var text='V-Belt Selection\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nBelts: '+$('vc-r-nbelts').textContent+'\\nDesign Power: '+$('vc-r-pd').textContent+'\\nPower\/Belt: '+$('vc-r-pb').textContent+'\\nBelt Speed: '+$('vc-r-speed').textContent+'\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nvibromera.eu\/calculators\/'+SLUG+'\/';\n        if(navigator.clipboard){navigator.clipboard.writeText(text).then(function(){var b=$('vc-copy-btn');b.classList.add('vc-copied');b.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><polyline points=\"20 6 9 17 4 12\"\/><\/svg> Copied!';setTimeout(function(){b.classList.remove('vc-copied');b.innerHTML='<svg width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\"\/><path d=\"M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1\"\/><\/svg> Copy'},2000)})}\n    });\n\n    document.querySelectorAll('.vc-section-toggle').forEach(function(btn){btn.addEventListener('click',function(){var s=this.closest('.vc-section');s.classList.toggle('vc-open');this.setAttribute('aria-expanded',s.classList.contains('vc-open'))})});\n\n    var faqData=[\n        {q:'How do I select the right V-belt cross-section?',a:'<p>Selection is based on design power (power \u00d7 service factor) and speed. Use Z\/SPZ for \u22644 kW, A\/SPA for 2\u201320 kW, B\/SPB for 5\u201360 kW, C\/SPC for 15\u2013150 kW, D for 50\u2013500 kW.<\/p>'},\n        {q:'What is the difference between classical and narrow V-belts?',a:'<p>Classical V-belts (Z, A, B, C, D) have wider profiles. Narrow V-belts (SPZ, SPA, SPB, SPC) transmit 30\u201350% more power per belt and are preferred for new designs.<\/p>'},\n        {q:'How do I calculate the number of belts needed?',a:'<p>Number of belts = Design Power \/ (Power per belt \u00d7 Correction factors). Include wrap angle factor, belt length factor. Always round up to the nearest whole number.<\/p>'},\n        {q:'What service factors apply to V-belt drives?',a:'<p>1.0\u20131.2 for uniform loads (fans, pumps), 1.1\u20131.3 for light shocks, 1.2\u20131.4 for moderate shocks, 1.3\u20131.8 for heavy shocks. Multiply by 1.2 for &gt;10 hours\/day operation.<\/p>'},\n        {q:'What is the maximum recommended V-belt speed?',a:'<p>25\u201330 m\/s for classical V-belts, up to 40 m\/s for narrow V-belts. Above these speeds, centrifugal forces reduce capacity significantly.<\/p>'}\n    ];\n    var fl=$('vc-faq-list');faqData.forEach(function(f){fl.innerHTML+='<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>'+f.q+'<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">'+f.a+'<\/div><\/div><\/div>'});\n    fl.addEventListener('click',function(e){var b=e.target.closest('.vc-faq-q');if(b)b.closest('.vc-faq-item').classList.toggle('vc-open')});\n\n    function renderFormulas(){\n        try{\n            katex.render('P_d = P \\\\times K_A',$('vc-katex-1'),{displayMode:true,throwOnError:false});\n            katex.render('z = \\\\left\\\\lceil \\\\frac{P_d}{P_b \\\\times C_1 \\\\times C_3} \\\\right\\\\rceil',$('vc-katex-2'),{displayMode:true,throwOnError:false});\n        }catch(e){}\n    }\n\n    function init(){renderFormulas();calculate()}\n    if(document.readyState==='loading'){document.addEventListener('DOMContentLoaded',init)}else{init()}\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>ISO 5288 \u0985\u09a8\u09c1\u09af\u09be\u09af\u09bc\u09c0 \u09ac\u09bf\u09a8\u09be\u09ae\u09c2\u09b2\u09cd\u09af\u09c7 \u0985\u09a8\u09b2\u09be\u0987\u09a8 V-\u09ac\u09c7\u09b2\u09cd\u099f \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8 \u0995\u09cd\u09af\u09be\u09b2\u0995\u09c1\u09b2\u09c7\u099f\u09b0\u0964 \u0995\u09cd\u09b7\u09ae\u09a4\u09be, \u0997\u09a4\u09bf \u098f\u09ac\u0982 \u09b8\u09c7\u09ac\u09be \u09ab\u09cd\u09af\u09be\u0995\u09cd\u099f\u09b0 \u09aa\u09cd\u09b0\u09ac\u09c7\u0936 \u0995\u09b0\u09c1\u09a8 \u098f\u09ac\u0982 \u09ac\u09c7\u09b2\u09cd\u099f \u0995\u09cd\u09b0\u09b8-\u09b8\u09c7\u0995\u09b6\u09a8 (Z, A, B, C, D, SPZ, SPA, SPB, SPC) \u09a8\u09bf\u09b0\u09cd\u09ac\u09be\u099a\u09a8 \u0995\u09b0\u09c1\u09a8 \u098f\u09ac\u0982 \u09aa\u09cd\u09b0\u09af\u09bc\u09cb\u099c\u09a8\u09c0\u09af\u09bc \u09ac\u09c7\u09b2\u09cd\u099f\u09c7\u09b0 \u09b8\u0982\u0996\u09cd\u09af\u09be \u0997\u09a3\u09a8\u09be \u0995\u09b0\u09c1\u09a8\u0964<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100276","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100276","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100276\/revisions"}],"predecessor-version":[{"id":100586,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/calculator\/100276\/revisions\/100586"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/media?parent=100276"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/categories?post=100276"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/bn\/wp-json\/wp\/v2\/tags?post=100276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}