{"id":100068,"date":"2026-02-15T20:14:47","date_gmt":"2026-02-15T20:14:47","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100068"},"modified":"2026-07-12T00:20:23","modified_gmt":"2026-07-12T00:20:23","slug":"coupling-unbalance-tolerance","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/sv\/calculators\/coupling-unbalance-tolerance\/","title":{"rendered":"Coupling-Component Residual Unbalance | Supplied Tolerance"},"content":{"rendered":"\r\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Coupling-Component Residual Unbalance Arithmetic\",\"description\":\"Calculate permissible residual unbalance from an externally supplied specific-unbalance limit and the actual component mass; optionally calculate equivalent mass at a radius and rotating force.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/coupling-unbalance-tolerance\/\",\"applicationCategory\":\"Engineering 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p:last-child{margin-bottom:0}.vc-faq-a-inner ul{margin:4px 0 8px 16px;padding:0}.vc-faq-a-inner li{margin-bottom:3px}\r\n.vc-related{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.vc-related-link{display:inline-block;padding:8px 16px;font-family:var(--vc-font);font-size:13px;font-weight:600;background:var(--vc-surface-alt);color:var(--vc-ink-secondary);border:1px solid var(--vc-border);border-radius:var(--vc-radius);text-decoration:none;transition:all 0.15s}.vc-related-link:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}\r\n.vc-promo{margin-top:24px;padding:20px;background:linear-gradient(135deg,var(--vc-accent-light),var(--vc-surface));border:1px solid var(--vc-border);border-radius:var(--vc-radius-lg);display:flex;align-items:center;gap:16px}.vc-promo-text{flex:1;font-size:14px;color:var(--vc-ink-secondary)}.vc-promo-text strong{color:var(--vc-ink)}.vc-promo-link{padding:8px 20px;font-size:13px;font-weight:700;color:#fff;background:var(--vc-accent);border-radius:var(--vc-radius);text-decoration:none;white-space:nowrap;transition:background 0.15s}.vc-promo-link:hover{background:var(--vc-accent-hover)}\r\n.vc-footer{text-align:center;padding:32px 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}\r\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}}\r\n<\/style>\r\n<div class=\"vc-calculator\" id=\"vc-coupling-u\"><header class=\"vc-header\"><p class=\"vc-header-eyebrow\">Supplied tolerance arithmetic<\/p><h1 class=\"vc-header-title\">Coupling-Component Residual Unbalance<\/h1><p class=\"vc-header-subtitle\">Convert a traceable permissible specific residual unbalance for the actual coupling component into total g\u00b7mm. Optional radius and speed inputs give an equivalent correction mass and rotating-force amplitude.<\/p><div class=\"vc-badges\"><span class=\"vc-badge\">No automatic G grade<\/span><span class=\"vc-badge\">Actual component mass<\/span><span class=\"vc-badge\">Source required<\/span><\/div><\/header>\r\n<div class=\"vc-card\"><form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\"><div class=\"vc-form-grid\"><div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-mass\">Actual balanced component mass m <span class=\"vc-label-hint\">(kg)<\/span><\/label><input class=\"vc-input\" type=\"text\" id=\"vc-mass\" inputmode=\"decimal\"><\/div><div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-e\">Supplied permissible specific residual unbalance e <span class=\"vc-label-hint\">(\u03bcm; \u22650)<\/span><\/label><input class=\"vc-input\" type=\"text\" id=\"vc-e\" inputmode=\"decimal\"><\/div><div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-radius\">Correction\/check radius r <span class=\"vc-label-hint\">(mm; optional)<\/span><\/label><input class=\"vc-input\" type=\"text\" id=\"vc-radius\" inputmode=\"decimal\"><\/div><div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-speed\">Check speed n <span class=\"vc-label-hint\">(r\/min; optional)<\/span><\/label><input class=\"vc-input\" type=\"text\" id=\"vc-speed\" inputmode=\"decimal\"><\/div><div class=\"vc-field vc-field-full\"><label class=\"vc-label\" for=\"vc-source\">Tolerance source, edition, component scope and allocation basis<\/label><input class=\"vc-input\" type=\"text\" id=\"vc-source\" maxlength=\"300\"><\/div><\/div><p id=\"vc-error\" role=\"alert\" style=\"margin:.75rem 0 0;color:#b42318\"><\/p><div class=\"vc-warning-box\"><p style=\"margin:0\"><strong>Source gate:<\/strong> enter the mass of the actual component being balanced\u2014not half of an assembly mass unless that is the measured component mass. The supplied e must already reflect the applicable standard\/manufacturer criterion, rotor behaviour, speed, correction planes and tolerance allocation.<\/p><\/div><\/form>\r\n<div class=\"vc-results\" id=\"vc-results\"><div class=\"vc-results-head\"><h2 class=\"vc-results-title\">Residual-unbalance arithmetic<\/h2><button type=\"button\" class=\"vc-copy-btn\" id=\"vc-copy-btn\">Copy<\/button><\/div><div class=\"vc-result-grid\"><div class=\"vc-rcard vc-rcard-primary\"><div class=\"vc-rcard-label\">Permissible residual unbalance U<\/div><div class=\"vc-rcard-value\" id=\"vc-r-U\">\u2014<\/div><\/div><div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Specific unbalance identity U\/m<\/div><div class=\"vc-rcard-value\" id=\"vc-r-e\">\u2014<\/div><\/div><div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Equivalent mass at supplied radius<\/div><div class=\"vc-rcard-value\" id=\"vc-r-cmass\">Not calculated<\/div><\/div><div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Force amplitude at supplied speed<\/div><div class=\"vc-rcard-value\" id=\"vc-r-force\">Not calculated<\/div><\/div><div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Angular velocity<\/div><div class=\"vc-rcard-value\" id=\"vc-r-omega\">Not calculated<\/div><\/div><\/div><p id=\"vc-r-note\" style=\"margin:0;color:var(--vc-ink-secondary)\"><\/p><\/div><\/div>\r\n<div class=\"vc-section vc-open\"><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\">Equations and standards boundary<\/span><\/span><\/button><div class=\"vc-section-body\"><div class=\"vc-section-inner vc-theory\"><div class=\"vc-formula-box\">U [g\u00b7mm] = e [\u03bcm] \u00b7 m [kg]<\/div><div class=\"vc-formula-box\">m<sub>r<\/sub> [g]=U\/r<sub>mm<\/sub>; &nbsp; \u03c9=2\u03c0n\/60; &nbsp; F=U\u00b710<sup>\u22126<\/sup>\u03c9\u00b2<\/div><p>The first identity follows from 1 kg\u00b7\u03bcm=1 g\u00b7mm. The radius conversion and rotating-force equation are general mechanics, not acceptance formulas from ISO or API.<\/p><p><a href=\"https:\/\/www.iso.org\/standard\/54074.html\" target=\"_blank\" rel=\"noopener\">ISO 21940-11:2016<\/a> with <a href=\"https:\/\/www.iso.org\/standard\/78116.html\" target=\"_blank\" rel=\"noopener\">Amd 1:2022<\/a> establishes rigid-rotor balancing procedures\/tolerances, including required correction planes, allocation and balancing-process errors; flexible rotors are outside Part 11. The official public scope does not justify this page choosing a coupling G grade or dividing assembly mass by two.<\/p><p>The official <a href=\"https:\/\/www.api.org\/products-and-services\/standards\/digital-catalog\" target=\"_blank\" rel=\"noopener\">API catalog<\/a> identifies API Standard 671, 5th edition, as the current special-purpose coupling publication. Its numerical component-balance criteria are licensed content and are not reproduced or paraphrased here. Enter a verified requirement from the licensed standard, purchaser specification or manufacturer as e and identify its allocation basis.<\/p><div class=\"vc-warning-box\"><p style=\"margin:0\"><strong>No compliance claim:<\/strong> arithmetic agreement with a supplied e does not prove balance acceptance. Verify measurement uncertainty, tooling\/mandrel and key conventions, component versus assembly state, correction-plane allocation and the current governing document.<\/p><\/div><\/div><\/div><\/div><footer class=\"vc-footer\"><p>\u00a9 2024\u20132026 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a><\/p><p>Arithmetic from a supplied tolerance only; no automatic ISO\/API criterion. Scientific review: July 2026.<\/p><\/footer><\/div>\r\n<script>(function(){'use strict';function $(i){return document.getElementById(i)}function raw(v){var s=String(v).trim().replace(\/\\s+\/g,'');if(!\/^[+]?(?:\\d+(?:[.,]\\d*)?|[.,]\\d+)$\/.test(s))return NaN;return Number(s.replace(',','.'))}function pos(v){var x=raw(v);return Number.isFinite(x)&&x>0?x:NaN}function nn(v){var x=raw(v);return Number.isFinite(x)&&x>=0?x:NaN}function f(x){return x.toFixed(9).replace(\/(\\.\\d*?)0+$\/,'$1').replace(\/\\.$\/,'')}function calc(){var m=pos($('vc-mass').value),e=nn($('vc-e').value),rr=$('vc-radius').value.trim(),r=rr===''?null:pos(rr),nr=$('vc-speed').value.trim(),n=nr===''?null:pos(nr),source=$('vc-source').value.trim(),any=Array.from(document.querySelectorAll('#vc-form input')).some(function(x){return x.value.trim()});if(!Number.isFinite(m)||!Number.isFinite(e)||(rr!==''&&!Number.isFinite(r))||(nr!==''&&!Number.isFinite(n))||!source){$('vc-error').textContent=any?'Enter m>0,e\u22650,optional r\/n>0 and a traceable tolerance source\/scope.':'';$('vc-results').classList.remove('vc-visible');return}var U=e*m;$('vc-error').textContent='';$('vc-r-U').textContent=f(U)+' g\u00b7mm';$('vc-r-e').textContent=f(U\/m)+' \u03bcm';$('vc-r-cmass').textContent=r===null?'Not calculated':f(U\/r)+' g';if(n===null){$('vc-r-force').textContent='Not calculated';$('vc-r-omega').textContent='Not calculated'}else{var w=2*Math.PI*n\/60;$('vc-r-omega').textContent=f(w)+' rad\/s';$('vc-r-force').textContent=f(U*1e-6*w*w)+' N'}$('vc-r-note').textContent='Criterion: '+source+' | No automatic grade or API limit applied.';$('vc-results').classList.add('vc-visible');var u=new URL(location),v={component_mass_kg:m,permissible_specific_unbalance_um:e,tolerance_source_scope:source};if(r===null)u.searchParams.delete('correction_radius_mm');else v.correction_radius_mm=r;if(n===null)u.searchParams.delete('check_speed_rpm');else v.check_speed_rpm=n;Object.keys(v).forEach(function(k){u.searchParams.set(k,v[k])});history.replaceState(null,'',u.toString())}$('vc-form').addEventListener('input',calc);$('vc-copy-btn').addEventListener('click',function(){if(navigator.clipboard)navigator.clipboard.writeText($('vc-results').innerText)});document.querySelectorAll('.vc-section-toggle').forEach(function(b){b.addEventListener('click',function(){var s=this.closest('.vc-section');s.classList.toggle('vc-open');this.setAttribute('aria-expanded',s.classList.contains('vc-open'))})});var p=new URLSearchParams(location.search),map={component_mass_kg:'vc-mass',permissible_specific_unbalance_um:'vc-e',correction_radius_mm:'vc-radius',check_speed_rpm:'vc-speed',tolerance_source_scope:'vc-source'};Object.keys(map).forEach(function(k){if(p.has(k))$(map[k]).value=p.get(k)});calc()})();<\/script>\r\n","protected":false},"excerpt":{"rendered":"<p>Calculate total residual unbalance from an externally verified specific-unbalance limit and actual component mass; no automatic ISO grade, API formula, or half-mass assumption.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100068","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/calculator\/100068","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/calculator\/100068\/revisions"}],"predecessor-version":[{"id":102358,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/calculator\/100068\/revisions\/102358"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/media?parent=100068"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/categories?post=100068"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/sv\/wp-json\/wp\/v2\/tags?post=100068"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}