{"id":100220,"date":"2026-02-15T20:28:03","date_gmt":"2026-02-15T20:28:03","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100220"},"modified":"2026-02-15T20:28:03","modified_gmt":"2026-02-15T20:28:03","slug":"separator-balancing","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/sw\/calculators\/separator-balancing\/","title":{"rendered":"Kikokotozi cha Kubadilisha Kigawaji \/ Centrifuge"},"content":{"rendered":"\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Separator \/ Centrifuge Balancing Calculator\",\"alternateName\":[\"Centrifuge Balancing Calculator\",\"Separator Bowl Unbalance Calculator\"],\"description\":\"Free online calculator for separator and centrifuge balancing per ISO 21940. Computes permissible unbalance, eccentricity, centrifugal force, and g-force at bowl rim.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/separator-balancing\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any (Web Browser)\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2025-01-01\",\"dateModified\":\"2026-02-15\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true,\"featureList\":[\"ISO 21940-11 compliant\",\"G-force calculation\",\"Centrifugal force output\",\"Eccentricity calculation\",\"Auto-calculation on input change\",\"Preset configurations\"],\"keywords\":\"separator balancing, centrifuge balancing, bowl unbalance, g-force, disc stack, decanter\"}\n<\/script>\n\n<script type=\"application\/ld+json\">\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"Why is centrifuge bowl balancing critical?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Centrifuge bowls spin at very high speeds (3,000\u201310,000+ RPM), creating enormous centrifugal forces. Even small unbalance produces large dynamic forces that damage bearings, seals, and the spindle. Precise balancing extends service life and ensures separation efficiency.\"}},\n{\"@type\":\"Question\",\"name\":\"What balance grade should I use for a separator?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"G2.5 is recommended for disc stack separators and high-speed centrifuges. G6.3 is acceptable for decanter centrifuges and lower-speed separators. G1.0 may be required for ultra-high-speed lab centrifuges.\"}},\n{\"@type\":\"Question\",\"name\":\"How is g-force at the bowl rim calculated?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"RCF (relative centrifugal force) = \u03c9\u00b2 \u00d7 R \/ (9.81 \u00d7 1000), where \u03c9 is angular velocity in rad\/s and R is bowl radius in mm. This gives the g-force as a multiple of gravitational acceleration.\"}},\n{\"@type\":\"Question\",\"name\":\"What causes centrifuge unbalance?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Common causes include uneven sediment buildup, worn or missing disc stack plates, damaged bowl components, incorrect reassembly after cleaning, and manufacturing tolerances. Regular cleaning and inspection help maintain balance.\"}},\n{\"@type\":\"Question\",\"name\":\"Can separators be balanced in-situ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, portable balancing instruments can measure vibration during operation and calculate correction masses. This is especially valuable for large decanters that are difficult to remove. Vibromera's Balanset series supports in-situ centrifuge balancing.\"}}\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\":\"Separator Balancing Calculator\",\"item\":\"https:\/\/vibromera.eu\/calculators\/separator-balancing\/\"}\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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21940-11<\/span>\n        <span class=\"vc-badge\">Disc Stack \/ Decanter<\/span>\n        <span class=\"vc-badge\">G-Force<\/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-mass\">Bowl Mass <span class=\"vc-label-hint\">(kg)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-mass\" inputmode=\"decimal\" step=\"any\" min=\"0.001\" placeholder=\"e.g. 40\" value=\"40\">\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-speed\">Max 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. 6000\" value=\"6000\">\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-grade\">Balance Grade G<\/label>\n                <select class=\"vc-select\" id=\"vc-grade\">\n                    <option value=\"1\">G1.0 \u2014 High-precision centrifuges<\/option>\n                    <option value=\"2.5\" selected>G2.5 \u2014 Disc stack separators<\/option>\n                    <option value=\"6.3\">G6.3 \u2014 Decanter centrifuges<\/option>\n                <\/select>\n            <\/div>\n            <div class=\"vc-field\">\n                <label class=\"vc-label\" for=\"vc-diameter\">Bowl Diameter <span class=\"vc-label-hint\">(mm)<\/span><\/label>\n                <input class=\"vc-input\" type=\"number\" id=\"vc-diameter\" inputmode=\"decimal\" step=\"any\" min=\"1\" placeholder=\"e.g. 300\" value=\"300\">\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-m=\"40\" data-d=\"300\" data-s=\"6000\" data-g=\"2.5\">Disc stack \u00d8300mm 40kg 6000RPM G2.5<\/button>\n            <button type=\"button\" class=\"vc-preset-btn\" data-m=\"150\" data-d=\"400\" data-s=\"3500\" data-g=\"6.3\">Decanter \u00d8400mm 150kg 3500RPM G6.3<\/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\">\n                <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>\n                Copy\n            <\/button>\n        <\/div>\n        <div class=\"vc-result-grid\">\n            <div class=\"vc-rcard vc-rcard-primary\">\n                <div class=\"vc-rcard-label\">Permissible Unbalance<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-ubal\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Specific Unbalance (Eccentricity)<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-ecc\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Centrifugal Force at Permissible Unbalance<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-force\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">G-Force at Bowl Rim (RCF)<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-gforce\">\u2014<\/div>\n            <\/div>\n            <div class=\"vc-rcard\">\n                <div class=\"vc-rcard-label\">Angular Velocity \u03c9<\/div>\n                <div class=\"vc-rcard-value\" id=\"vc-r-omega\">\u2014<\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- Theory -->\n<div class=\"vc-section vc-open\" id=\"vc-sec-theory\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\">\n        <span class=\"vc-section-toggle-text\">\n            <span class=\"vc-section-icon\">\ud83d\udcd8<\/span>\n            <span class=\"vc-section-title\">Theory &amp; Formulas<\/span>\n        <\/span>\n        <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>\n    <\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner vc-theory\">\n            <h3>Permissible Unbalance (ISO 21940)<\/h3>\n            <p>The permissible residual unbalance for a centrifuge bowl is calculated using the standard ISO 21940-11 formula:<\/p>\n            <div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n            <ul>\n                <li><strong>G<\/strong> \u2014 balance quality grade (mm\/s)<\/li>\n                <li><strong>m<\/strong> \u2014 bowl mass (kg)<\/li>\n                <li><strong>\u03c9<\/strong> = 2\u03c0\u00b7n\/60 \u2014 angular velocity (rad\/s)<\/li>\n            <\/ul>\n\n            <h3>Centrifugal Force<\/h3>\n            <div class=\"vc-formula-box\" id=\"vc-katex-2\"><\/div>\n\n            <h3>G-Force (Relative Centrifugal Force)<\/h3>\n            <p>The g-force at the bowl rim represents the separation capability:<\/p>\n            <div class=\"vc-formula-box\" id=\"vc-katex-3\"><\/div>\n            <p>Where <strong>R<\/strong> is the bowl radius in mm. This value is expressed as multiples of gravitational acceleration (\u00d7g).<\/p>\n\n            <h3>Practical Example<\/h3>\n            <div class=\"vc-example-box\">\n                <div class=\"vc-example-title\">Example \u2014 Disc Stack Separator<\/div>\n                <p><strong>Given:<\/strong> Bowl mass = 40 kg, Speed = 6000 RPM, Grade = G2.5, Diameter = 300 mm<\/p>\n                <p>\u03c9 = 2\u03c0 \u00d7 6000 \/ 60 = 628.32 rad\/s<\/p>\n                <p>U<sub>per<\/sub> = 2.5 \u00d7 40 \u00d7 1000 \/ 628.32 = <strong>159.2 g\u00b7mm<\/strong><\/p>\n                <p>F = 159.2 \/ 1e6 \u00d7 628.32\u00b2 = <strong>62.8 N<\/strong><\/p>\n                <p>G-force = 628.32\u00b2 \u00d7 150 \/ (9.81 \u00d7 1000) = <strong>6,036 \u00d7g<\/strong><\/p>\n            <\/div>\n\n            <div class=\"vc-warning-box\">\n                <p style=\"margin:0;font-size:14px;color:var(--vc-ink-secondary);\"><strong>\u26a0\ufe0f Note:<\/strong> High-speed centrifuges require extremely tight balance tolerances. Even a few grams of unbalance at 6000+ RPM generates hundreds of newtons of force. Always verify balance after bowl reassembly and disc replacement.<\/p>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- Related -->\n<div class=\"vc-section\" id=\"vc-sec-related\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\">\n        <span class=\"vc-section-toggle-text\">\n            <span class=\"vc-section-icon\">\ud83d\udd17<\/span>\n            <span class=\"vc-section-title\">Related Calculators<\/span>\n        <\/span>\n        <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>\n    <\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner\">\n            <div class=\"vc-related\">\n                <a class=\"vc-related-link\" href=\"\/calculators\/residual-unbalance-iso1940\/\">Residual Unbalance (ISO 21940)<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/centrifuge-g-force\/\">Centrifuge G-Force (RCF)<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/spindle-unbalance\/\">Spindle Unbalance<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/propeller-unbalance\/\">Propeller Unbalance<\/a>\n                <a class=\"vc-related-link\" href=\"\/calculators\/trial-weight-calculator\/\">Trial Weight Calculator<\/a>\n            <\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<!-- FAQ -->\n<div class=\"vc-section\" id=\"vc-sec-faq\">\n    <button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"false\">\n        <span class=\"vc-section-toggle-text\">\n            <span class=\"vc-section-icon\">\u2753<\/span>\n            <span class=\"vc-section-title\">Frequently Asked Questions<\/span>\n        <\/span>\n        <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>\n    <\/button>\n    <div class=\"vc-section-body\">\n        <div class=\"vc-section-inner\">\n            <div class=\"vc-faq-list\" id=\"vc-faq-list\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n\n<div class=\"vc-promo\">\n    <div class=\"vc-promo-text\">\n        <strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>\n        Professional field balancing instruments for centrifuges, separators, and rotating machinery. Achieve ISO 21940-11 compliance on-site.\n    <\/div>\n    <a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a>\n<\/div>\n\n<footer class=\"vc-footer\">\n    <p>\u00a9 2024\u20132026 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u2014 Engineering Calculators<\/p>\n    <p style=\"font-size:12px;margin-top:4px;\">Based on ISO 21940-11. Calculator #241. Last updated: February 2026<\/p>\n    <div class=\"vc-footer-links\">\n        <a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a>\n        <a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a>\n    <\/div>\n<\/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 = 'separator-balancing';\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    function calculate() {\n        var mass = parseFloat($('vc-mass').value);\n        var speed = parseFloat($('vc-speed').value);\n        var grade = parseFloat($('vc-grade').value);\n        var diameter = parseFloat($('vc-diameter').value);\n\n        if (!mass || mass <= 0 || !speed || speed <= 0) {\n            $('vc-results').classList.remove('vc-visible');\n            return;\n        }\n\n        var omega = 2 * Math.PI * speed \/ 60;\n        var eper = grade * 1000 \/ omega;\n        var uper = grade * mass * 1000 \/ omega;\n        var force = uper \/ 1e6 * omega * omega;\n\n        \/\/ g-force at bowl rim\n        var R = (diameter && diameter > 0) ? diameter \/ 2 : 0;\n        var gforce = R > 0 ? (omega * omega * R) \/ (9.81 * 1000) : 0;\n\n        $('vc-r-ubal').innerHTML = (uper >= 1000 ? fmt(uper, 0) : fmt(uper, 1)) + ' <span class=\"vc-rcard-unit\">g\u00b7mm<\/span>';\n        $('vc-r-ecc').innerHTML = fmt(eper, 2) + ' <span class=\"vc-rcard-unit\">\u03bcm<\/span>';\n        $('vc-r-force').innerHTML = (force >= 1000 ? fmt(force, 0) : fmt(force, 1)) + ' <span class=\"vc-rcard-unit\">N<\/span>';\n        $('vc-r-gforce').innerHTML = gforce > 0 ? (fmt(gforce, 0) + ' <span class=\"vc-rcard-unit\">\u00d7g<\/span>') : '\u2014';\n        $('vc-r-omega').innerHTML = fmt(omega, 2) + ' <span class=\"vc-rcard-unit\">rad\/s<\/span>';\n\n        $('vc-results').classList.add('vc-visible');\n\n        var u = new URL(window.location);\n        u.searchParams.set('mass', mass); u.searchParams.set('speed', speed);\n        u.searchParams.set('grade', grade); u.searchParams.set('diameter', diameter);\n        history.replaceState(null, '', u.toString());\n\n        saveHistory({ mass:mass, speed:speed, grade:grade, diameter:diameter,\n            _summary: 'm=' + mass + 'kg, \u00d8' + diameter + 'mm, ' + speed + 'RPM, G' + grade });\n    }\n\n    document.querySelectorAll('.vc-preset-btn').forEach(function(btn) {\n        btn.addEventListener('click', function(e) {\n            e.preventDefault();\n            $('vc-mass').value = this.getAttribute('data-m');\n            $('vc-diameter').value = this.getAttribute('data-d');\n            $('vc-speed').value = this.getAttribute('data-s');\n            $('vc-grade').value = this.getAttribute('data-g');\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 = 'Separator \/ Centrifuge Balancing Calculation\\n' +\n            '\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\n' +\n            'Bowl Mass: ' + $('vc-mass').value + ' kg\\n' +\n            'Speed: ' + $('vc-speed').value + ' RPM\\n' +\n            'Grade: G' + $('vc-grade').value + '\\n' +\n            'Bowl Diameter: ' + $('vc-diameter').value + ' mm\\n' +\n            'Permissible Unbalance: ' + $('vc-r-ubal').textContent + '\\n' +\n            'Eccentricity: ' + $('vc-r-ecc').textContent + '\\n' +\n            'Centrifugal Force: ' + $('vc-r-force').textContent + '\\n' +\n            'G-Force: ' + $('vc-r-gforce').textContent + '\\n' +\n            '\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\n' +\n            'vibromera.eu\/calculators\/separator-balancing\/';\n        if (navigator.clipboard) {\n            navigator.clipboard.writeText(text).then(function() {\n                var btn = $('vc-copy-btn');\n                btn.classList.add('vc-copied');\n                btn.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!';\n                setTimeout(function() { btn.classList.remove('vc-copied'); btn.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    });\n\n    document.querySelectorAll('.vc-section-toggle').forEach(function(btn) {\n        btn.addEventListener('click', function() {\n            var section = this.closest('.vc-section');\n            section.classList.toggle('vc-open');\n            this.setAttribute('aria-expanded', section.classList.contains('vc-open'));\n        });\n    });\n\n    var faqData = [\n        { q: 'Why is centrifuge bowl balancing critical?', a: '<p>Centrifuge bowls spin at very high speeds (3,000\u201310,000+ RPM), creating enormous centrifugal forces. Even small unbalance produces large dynamic forces that damage bearings, seals, and the spindle. Precise balancing extends service life and ensures separation efficiency.<\/p>' },\n        { q: 'What balance grade should I use for a separator?', a: '<p><strong>G2.5<\/strong> is recommended for disc stack separators and high-speed centrifuges. <strong>G6.3<\/strong> is acceptable for decanter centrifuges and lower-speed separators. <strong>G1.0<\/strong> may be required for ultra-high-speed laboratory centrifuges.<\/p>' },\n        { q: 'How is g-force at the bowl rim calculated?', a: '<p>RCF (relative centrifugal force) = \u03c9\u00b2 \u00d7 R \/ (9.81 \u00d7 1000), where \u03c9 is angular velocity in rad\/s and R is bowl radius in mm. A disc stack separator at 6000 RPM with a 150 mm radius produces approximately 6,000 \u00d7g.<\/p>' },\n        { q: 'What causes centrifuge unbalance?', a: '<p>Common causes include:<\/p><ul><li>Uneven sediment buildup inside the bowl<\/li><li>Worn or missing disc stack plates<\/li><li>Damaged bowl components<\/li><li>Incorrect reassembly after cleaning<\/li><li>Manufacturing tolerances<\/li><\/ul><p>Regular cleaning and inspection help maintain balance.<\/p>' },\n        { q: 'Can separators be balanced in-situ?', a: '<p>Yes, portable balancing instruments can measure vibration during operation and calculate correction masses. This is especially valuable for large decanters. Vibromera\\'s Balanset series supports in-situ centrifuge balancing without disassembly.<\/p>' }\n    ];\n    var faqList = $('vc-faq-list');\n    faqData.forEach(function(faq) {\n        faqList.innerHTML += '<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>' + faq.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\">' + faq.a + '<\/div><\/div><\/div>';\n    });\n    faqList.addEventListener('click', function(e) { var btn = e.target.closest('.vc-faq-q'); if (!btn) return; btn.closest('.vc-faq-item').classList.toggle('vc-open'); });\n\n    function saveHistory(entry) {\n        var key = 'vc_history_' + SLUG; var arr = [];\n        try { arr = JSON.parse(localStorage.getItem(key)) || []; } catch(e) {}\n        entry._ts = new Date().toISOString(); arr.unshift(entry);\n        if (arr.length > 10) arr = arr.slice(0, 10);\n        try { localStorage.setItem(key, JSON.stringify(arr)); } catch(e) {}\n    }\n\n    function loadParams() {\n        var p = new URLSearchParams(window.location.search);\n        p.forEach(function(v, k) { var el = $(k) || $('vc-' + k); if (el) el.value = v; });\n    }\n\n    function renderFormulas() {\n        try {\n            katex.render('U_{per} = \\\\frac{G \\\\times m \\\\times 1000}{\\\\omega} \\\\quad [g \\\\cdot mm]', $('vc-katex-1'), { displayMode: true, throwOnError: false });\n            katex.render('F = \\\\frac{U}{10^6} \\\\times \\\\omega^2 \\\\quad [N]', $('vc-katex-2'), { displayMode: true, throwOnError: false });\n            katex.render('\\\\text{RCF} = \\\\frac{\\\\omega^2 \\\\times R}{9.81 \\\\times 1000} \\\\quad [\\\\times g]', $('vc-katex-3'), { displayMode: true, throwOnError: false });\n        } catch(e) {}\n    }\n\n    function init() { loadParams(); renderFormulas(); calculate(); }\n    if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', init); } else { init(); }\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Kikokotoo cha bure cha mtandaoni cha kusawazisha kisepareta na sentrifugi kulingana na ISO 21940. Ingiza uzito wa bakuli, kasi, daraja la usawazishaji, na kipenyo ili kupata kutokuwa na usawaziko unaoruhusiwa, eccentricity, nguvu ya centrifugal, na g-force.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100220","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/calculator\/100220","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/calculator\/100220\/revisions"}],"predecessor-version":[{"id":100535,"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/calculator\/100220\/revisions\/100535"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/media?parent=100220"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/categories?post=100220"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/tags?post=100220"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}