{"id":100025,"date":"2026-02-15T20:07:01","date_gmt":"2026-02-15T20:07:01","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100025"},"modified":"2026-07-11T19:12:51","modified_gmt":"2026-07-11T19:12:51","slug":"bearing-press-fit-force","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/uk\/calculators\/bearing-press-fit-force\/","title":{"rendered":"\u041a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440 \u0441\u0438\u043b\u0438 \u043f\u0440\u0435\u0441\u0443\u0432\u0430\u043d\u043d\u044f \u043f\u0456\u0434\u0448\u0438\u043f\u043d\u0438\u043a\u0430 | \u0420\u0456\u0432\u043d\u044f\u043d\u043d\u044f \u041b\u0430\u043c\u0435 | \u0411\u0435\u0437\u043a\u043e\u0448\u0442\u043e\u0432\u043d\u0438\u0439 \u043e\u043d\u043b\u0430\u0439\u043d-\u0456\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442"},"content":{"rendered":"\r\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Bearing Press-Fit Force Calculator\",\"description\":\"Estimate idealized axial sliding force for a same-material solid shaft and thick-walled fitted ring using an elastic Lam\u00e9 model and a user-validated friction coefficient.\",\"url\":\"https:\/\/vibromera.eu\/calculators\/bearing-press-fit-force\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2025-01-01\",\"dateModified\":\"2026-07-11\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true}<\/script>\r\n\r\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\r\n{\"@type\":\"Question\",\"name\":\"How is the idealized press-fit force calculated?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For the stated same-material solid-shaft\/thick-ring elastic model, interface pressure is obtained from Lam\u00e9 compliance and sliding force is F = p \u00d7 \u03c0 \u00d7 d \u00d7 L \u00d7 \u03bc. The fitted-ring outer diameter must describe that ring itself, not the overall outside diameter of an assembled rolling bearing.\"}},\r\n{\"@type\":\"Question\",\"name\":\"What friction coefficient should I use?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Use a coefficient validated for the actual material pair, surface finish, lubricant, speed and contact pressure. The calculated force is directly proportional to \u03bc, so a generic oiled or dry label is not sufficient for press sizing.\"}},\r\n{\"@type\":\"Question\",\"name\":\"What does the thermal result mean?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The tool reports only the theoretical temperature rise \u03b4\/(\u03b1d) that expands the bore by the stated diametral interference. It contains no assembly clearance or thermal-loss allowance. Follow the component or bearing manufacturer\u2019s mounting method and temperature limits.\"}},\r\n{\"@type\":\"Question\",\"name\":\"Can this estimate size a press by itself?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The model assumes uniform elastic contact and constant sliding friction and omits entry geometry, static breakaway, misalignment, roughness, plasticity and edge effects. Press selection requires an engineering allowance supported by the actual process and equipment documentation.\"}},\r\n{\"@type\":\"Question\",\"name\":\"Can pressing damage the bearing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, if force is applied through the wrong ring. When pressing onto a shaft, apply force ONLY to the inner ring. When pressing into a housing, apply force ONLY to the outer ring. Never transmit force through rolling elements.\"}}\r\n]}<\/script>\r\n\r\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/vibromera.eu\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Calculators\",\"item\":\"https:\/\/vibromera.eu\/calculators\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Bearing Press-Fit Force\",\"item\":\"https:\/\/vibromera.eu\/calculators\/bearing-press-fit-force\/\"}]}<\/script>\r\n\r\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\r\n\r\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\r\n\r\n<link 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var(--vc-border-light);font-size:14px;color:var(--vc-ink-secondary)}.vc-faq-a-inner p{margin:0 0 8px}.vc-faq-a-inner p:last-child{margin-bottom:0}.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 .15s}.vc-related-link:hover{border-color:var(--vc-accent);color:var(--vc-accent);background:var(--vc-accent-light)}.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 .15s}.vc-promo-link:hover{background:var(--vc-accent-hover)}.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}@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}}<\/style>\r\n\r\n<div class=\"vc-calculator\">\r\n<header class=\"vc-header\"><p class=\"vc-header-eyebrow\">Free Engineering Tool #058<\/p><h1 class=\"vc-header-title\">Bearing Press-Fit Force Calculator<\/h1><p class=\"vc-header-subtitle\">Estimate axial sliding force for an idealized same-material solid shaft and thick-walled fitted ring. This is a Lam\u00e9-model estimate, not a bearing-manufacturer mounting-force value.<\/p><div class=\"vc-badges\"><span class=\"vc-badge\">Lam\u00e9 Equations<\/span><span class=\"vc-badge\">Assembly Force<\/span><span class=\"vc-badge\">Cold Press<\/span><\/div><\/header>\r\n<div class=\"vc-card\">\r\n    <form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\">\r\n        <div class=\"vc-form-grid\">\r\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-d\">Nominal Bore d <span class=\"vc-label-hint\">(mm)<\/span><\/label><input class=\"vc-input\" type=\"text\" id=\"vc-d\" inputmode=\"decimal\" autocomplete=\"off\" value=\"50\"><\/div>\r\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-delta\">Diametral Interference \u03b4 <span class=\"vc-label-hint\">(mm, e.g. 0.018)<\/span><\/label><input class=\"vc-input\" type=\"text\" id=\"vc-delta\" inputmode=\"decimal\" autocomplete=\"off\" value=\"0.018\"><\/div>\r\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-L\">Contact Length <span class=\"vc-label-hint\">(mm, bearing width)<\/span><\/label><input class=\"vc-input\" type=\"text\" id=\"vc-L\" inputmode=\"decimal\" autocomplete=\"off\" value=\"18\"><\/div>\r\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-Do\">Fitted Ring Outer Diameter D<sub>r<\/sub> <span class=\"vc-label-hint\">(mm, ring material boundary; not bearing OD)<\/span><\/label><input class=\"vc-input\" type=\"text\" id=\"vc-Do\" inputmode=\"decimal\" autocomplete=\"off\" value=\"80\"><\/div>\r\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-mu\">Sliding Friction \u03bc <span class=\"vc-label-hint\">(validated for the actual interface)<\/span><\/label><input class=\"vc-input\" type=\"text\" id=\"vc-mu\" inputmode=\"decimal\" autocomplete=\"off\" value=\"0.10\"><\/div>\r\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-E\">Young&#8217;s Modulus E <span class=\"vc-label-hint\">(GPa; same material for shaft and ring)<\/span><\/label><input class=\"vc-input\" type=\"text\" id=\"vc-E\" inputmode=\"decimal\" autocomplete=\"off\" value=\"210\"><\/div>\r\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-alpha\">Thermal Expansion \u03b1 <span class=\"vc-label-hint\">(\u03bcm\/(m\u00b7K), e.g. 11.7)<\/span><\/label><input class=\"vc-input\" type=\"text\" id=\"vc-alpha\" inputmode=\"decimal\" autocomplete=\"off\" value=\"11.7\"><\/div>\r\n        <\/div>\r\n        <div class=\"vc-presets\"><div class=\"vc-presets-label\">Quick presets<\/div>\r\n            <button type=\"button\" class=\"vc-preset-btn\" data-d=\"50\" data-delta=\"0.018\" data-l=\"18\" data-do=\"80\" data-mu=\"0.10\" data-e=\"210\" data-alpha=\"11.7\">Example A \u00b7 stated geometry \u00b7 \u03bc 0.10<\/button>\r\n            <button type=\"button\" class=\"vc-preset-btn\" data-d=\"80\" data-delta=\"0.025\" data-l=\"23\" data-do=\"140\" data-mu=\"0.10\" data-e=\"210\" data-alpha=\"11.7\">Example B \u00b7 stated geometry \u00b7 \u03bc 0.10<\/button>\r\n            <button type=\"button\" class=\"vc-preset-btn\" data-d=\"30\" data-delta=\"0.013\" data-l=\"14\" data-do=\"62\" data-mu=\"0.10\" data-e=\"210\" data-alpha=\"11.7\">Example C \u00b7 stated geometry \u00b7 \u03bc 0.10<\/button>\r\n            <button type=\"button\" class=\"vc-preset-btn\" data-d=\"100\" data-delta=\"0.035\" data-l=\"33\" data-do=\"180\" data-mu=\"0.10\" data-e=\"210\" data-alpha=\"11.7\">Example D \u00b7 stated geometry \u00b7 \u03bc 0.10<\/button>\r\n        <\/div>\r\n        <div class=\"vc-warning-box\"><p><strong>Model boundary:<\/strong> valid only for a uniform elastic interference fit between a solid shaft and a concentric thick-walled ring of the same isotropic material under the simplified open-ended Lam\u00e9 model. Real rolling-bearing rings, hollow shafts, dissimilar materials, short contacts and nonuniform geometry require manufacturer calculation or FEA.<\/p><\/div>\r\n    <\/form>\r\n    <div class=\"vc-results\" id=\"vc-results\">\r\n        <div class=\"vc-results-head\"><h2 class=\"vc-results-title\">Results<\/h2><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><\/div>\r\n        <div class=\"vc-result-grid\">\r\n            <div class=\"vc-rcard vc-rcard-primary\"><div class=\"vc-rcard-label\">Press-Fit Force<\/div><div class=\"vc-rcard-value\" id=\"vc-r-F\">\u2014<\/div><\/div>\r\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Interface Pressure p<\/div><div class=\"vc-rcard-value\" id=\"vc-r-p\">\u2014<\/div><\/div>\r\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Equivalent tonne-force<\/div><div class=\"vc-rcard-value\" id=\"vc-r-tons\">\u2014<\/div><\/div>\r\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Theoretical Minimum Temperature Rise<\/div><div class=\"vc-rcard-value\" id=\"vc-r-hot\">\u2014<\/div><\/div>\r\n        <\/div>\r\n    <\/div>\r\n<\/div>\r\n<div class=\"vc-section vc-open\" id=\"vc-sec-theory\"><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>\r\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner vc-theory\">\r\n        <h3>Interface Pressure (Lam\u00e9)<\/h3><div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\r\n        <h3>Press-Fit Force<\/h3><div class=\"vc-formula-box\" id=\"vc-katex-2\"><\/div>\r\n        <ul><li><strong>\u03bc<\/strong> \u2014 validated sliding-friction coefficient for the actual interface<\/li><li><strong>\u03b4<\/strong> \u2014 diametral interference (shaft OD \u2212 ring bore)<\/li><li><strong>d<\/strong> \u2014 nominal interface diameter<\/li><li><strong>D<sub>r<\/sub><\/strong> \u2014 actual outer material boundary of the fitted thick ring, not overall bearing OD<\/li><li><strong>E<\/strong> \u2014 Young&#8217;s modulus shared by shaft and ring in this special-case equation<\/li><\/ul>\r\n        <h3>Hot Mounting Alternative<\/h3>\r\n        <div class=\"vc-info-box\"><p><strong>\u2139\ufe0f<\/strong> The thermal result is only \u0394T<sub>min<\/sub> = \u03b4\/(\u03b1d), the uniform temperature rise that expands the bore by exactly the interference. It provides zero assembly clearance and ignores heat loss to the shaft. Add an engineered clearance allowance and follow the component manufacturer\u2019s permitted heating method and temperature limit.<\/p><\/div>\r\n        <h3>Practical Example<\/h3>\r\n        <div class=\"vc-example-box\"><div class=\"vc-example-title\">Worked example \u2014 idealized ring geometry, \u03b4 = 0.018 mm<\/div>\r\n            <p>k = 50\/80 = 0.625<\/p>\r\n            <p>p = 210000 \u00d7 0.018 \/ (2 \u00d7 50) \u00d7 (1 \u2212 0.625\u00b2) = 23.03 MPa<\/p>\r\n            <p>F = 23.03 \u00d7 \u03c0 \u00d7 50 \u00d7 18 \u00d7 0.10 \/ 1000 = <strong>6.51 kN (0.66 tf)<\/strong><\/p>\r\n        <\/div>\r\n        <div class=\"vc-warning-box\"><p style=\"margin:0;font-size:14px;color:var(--vc-ink-secondary);\"><strong>\u26a0\ufe0f Critical:<\/strong> When pressing a bearing onto a shaft, apply force ONLY to the inner ring. Never transmit force through rolling elements \u2014 this will cause brinelling damage.<\/p><\/div>\r\n    <\/div><\/div>\r\n<\/div>\r\n<div class=\"vc-section\" id=\"vc-sec-related\"><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>\r\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-related\"><a class=\"vc-related-link\" href=\"\/calculators\/bearing-removal-force\/\">Bearing Removal Force<\/a><a class=\"vc-related-link\" href=\"\/calculators\/bearing-fit-tolerance\/\">Fit Tolerance Selection<\/a><a class=\"vc-related-link\" href=\"\/calculators\/bearing-tolerance-class\/\">Tolerance Class (ISO 492)<\/a><a class=\"vc-related-link\" href=\"\/calculators\/bearing-thermal-expansion\/\">Thermal Expansion<\/a><\/div><\/div><\/div>\r\n<\/div>\r\n<div class=\"vc-section\" id=\"vc-sec-faq\"><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>\r\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner\"><div class=\"vc-faq-list\" id=\"vc-faq-list\"><\/div><\/div><\/div>\r\n<\/div>\r\n<div class=\"vc-promo\"><div class=\"vc-promo-text\"><strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>Professional vibration analyzers for bearing condition monitoring. Used in 50+ countries.<\/div><a class=\"vc-promo-link\" href=\"https:\/\/vibromera.eu\/\" target=\"_blank\" rel=\"noopener\">Learn More<\/a><\/div>\r\n<footer class=\"vc-footer\"><p>\u00a9 2024\u20132026 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a><\/p><p style=\"font-size:12px;margin-top:4px;\">Idealized Lam\u00e9 model. Scientific review: July 2026<\/p><div class=\"vc-footer-links\"><a href=\"\/calculators\/engineering-calculators\/\">All Calculators<\/a><a href=\"https:\/\/vibromera.eu\/contacts\/\">Contact<\/a><\/div><\/footer>\r\n<\/div>\r\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.js\"><\/script>\r\n<script>\r\n(function(){\r\n    'use strict';var SLUG='bearing-press-fit-force';\r\n    function $(id){return document.getElementById(id)}\r\n    function fmt(n,d){if(isNaN(n)||!isFinite(n))return'\u2014';return n.toFixed(d===undefined?1:d).replace(\/(\\.\\d*?)0+$\/,'$1').replace(\/\\.$\/,'')}\r\n    function parseLocaleNumber(raw){var normalized=String(raw).trim().replace(\/\\s+\/g,'');if(!\/^[+-]?(?:\\d+(?:[.,]\\d*)?|[.,]\\d+)$\/.test(normalized))return NaN;return Number(normalized.replace(',','.'));}\r\n\r\n    function calculate(){\r\n        var d=parseLocaleNumber($('vc-d').value),delta=parseLocaleNumber($('vc-delta').value),L=parseLocaleNumber($('vc-L').value);\r\n        var Do=parseLocaleNumber($('vc-Do').value),mu=parseLocaleNumber($('vc-mu').value),E_GPa=parseLocaleNumber($('vc-E').value),alphaMicro=parseLocaleNumber($('vc-alpha').value);\r\n        if(!isFinite(d)||d<=0||!isFinite(delta)||delta<=0||!isFinite(L)||L<=0||!isFinite(Do)||Do<=d||!isFinite(mu)||mu<=0||mu>1||!isFinite(E_GPa)||E_GPa<=0||!isFinite(alphaMicro)||alphaMicro<=0){$('vc-results').classList.remove('vc-visible');return;}\r\n        var E=E_GPa*1000;\r\n        var k=d\/Do;\r\n        var p=E*delta\/(2*d)*(1-k*k);\r\n        var F=p*Math.PI*d*L*mu\/1000; \/\/ kN\r\n        var tons=F\/9.807;\r\n        \/* Theoretical uniform temperature rise for zero assembly clearance. *\/\r\n        var alpha=alphaMicro*1e-6;\r\n        var hotDT=delta\/(d*alpha);\r\n        if(![p,F,tons,hotDT].every(isFinite)){$('vc-results').classList.remove('vc-visible');return;}\r\n\r\n        $('vc-r-F').innerHTML=fmt(F,F<1?2:1)+' <span class=\"vc-rcard-unit\">kN<\/span>';\r\n        $('vc-r-p').innerHTML=fmt(p,1)+' <span class=\"vc-rcard-unit\">MPa<\/span>';\r\n        $('vc-r-tons').innerHTML=fmt(tons,2)+' <span class=\"vc-rcard-unit\">tf<\/span>';\r\n        $('vc-r-hot').innerHTML=fmt(hotDT,1)+' <span class=\"vc-rcard-unit\">K (or \u00b0C difference)<\/span>';\r\n        $('vc-results').classList.add('vc-visible');\r\n        var u=new URL(window.location);u.searchParams.set('d',d);u.searchParams.set('delta',delta);u.searchParams.set('L',L);u.searchParams.set('Do',Do);u.searchParams.set('mu',mu);u.searchParams.set('E',E_GPa);u.searchParams.set('alpha',alphaMicro);history.replaceState(null,'',u.toString());\r\n        saveHistory({d:d,delta:delta,L:L,Do:Do,mu:mu,_summary:'d='+d+' \u03b4='+delta+'mm \u2192 F='+fmt(F,1)+'kN'});\r\n    }\r\n\r\n    document.querySelectorAll('.vc-preset-btn').forEach(function(btn){btn.addEventListener('click',function(e){e.preventDefault();$('vc-d').value=this.getAttribute('data-d');$('vc-delta').value=this.getAttribute('data-delta');$('vc-L').value=this.getAttribute('data-l');$('vc-Do').value=this.getAttribute('data-do');$('vc-mu').value=this.getAttribute('data-mu');$('vc-E').value=this.getAttribute('data-e');$('vc-alpha').value=this.getAttribute('data-alpha');calculate();});});\r\n    $('vc-form').addEventListener('input',calculate);$('vc-form').addEventListener('change',calculate);\r\n    $('vc-copy-btn').addEventListener('click',function(){var text='Bearing Press-Fit Force\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nd='+$('vc-d').value+'mm, \u03b4='+$('vc-delta').value+'mm\\nL='+$('vc-L').value+'mm, Dr='+$('vc-Do').value+'mm, \u03bc='+$('vc-mu').value+', E='+$('vc-E').value+'GPa, \u03b1='+$('vc-alpha').value+'\u03bcm\/(m\u00b7K)\\nF = '+$('vc-r-F').textContent+'\\np = '+$('vc-r-p').textContent+'\\nHot mount: '+$('vc-r-hot').textContent+'\\n\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\u2501\\nvibromera.eu';if(navigator.clipboard){navigator.clipboard.writeText(text).then(function(){var b=$('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);});}});\r\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'));});});\r\n    var faqData=[{q:'How is the idealized press-fit force calculated?',a:'<p>For the stated same-material solid-shaft\/thick-ring elastic model, interface pressure comes from Lam\u00e9 compliance and F = p \u00d7 \u03c0 \u00d7 d \u00d7 L \u00d7 \u03bc.<\/p><p>D<sub>r<\/sub> must be the outer material boundary of the fitted ring itself, not the outside diameter of an assembled rolling bearing.<\/p>'},{q:'What friction coefficient should I use?',a:'<p>Use a value validated for the actual material pair, finish, lubricant, speed and pressure. Force is directly proportional to \u03bc, so generic oiled\/dry labels are insufficient for press sizing.<\/p>'},{q:'What does the thermal result mean?',a:'<p>It is only \u03b4\/(\u03b1d): the uniform temperature rise that expands the bore by exactly the interference. It includes no assembly clearance or heat-loss allowance. Follow manufacturer limits.<\/p>'},{q:'Can this estimate size a press by itself?',a:'<p>No. Entry geometry, breakaway friction, misalignment, roughness, plasticity and edge effects are omitted. Apply an engineering process allowance backed by actual data.<\/p>'},{q:'Can pressing damage the bearing?',a:'<p>Yes \u2014 apply mounting force only to the ring with the interference fit. Do not transmit mounting force through the rolling elements; use the bearing manufacturer\u2019s mounting instructions.<\/p>'}];\r\n    var fl=$('vc-faq-list');faqData.forEach(function(f){fl.innerHTML+='<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>'+f.q+'<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">'+f.a+'<\/div><\/div><\/div>';});\r\n    fl.addEventListener('click',function(e){var b=e.target.closest('.vc-faq-q');if(b)b.closest('.vc-faq-item').classList.toggle('vc-open');});\r\n    function saveHistory(entry){var key='vc_history_'+SLUG;var arr=[];try{arr=JSON.parse(localStorage.getItem(key))||[];}catch(e){}entry._ts=new Date().toISOString();arr.unshift(entry);if(arr.length>10)arr=arr.slice(0,10);try{localStorage.setItem(key,JSON.stringify(arr));}catch(e){}}\r\n    function loadParams(){var p=new URLSearchParams(window.location.search);['d','delta','L','Do','mu','E','alpha'].forEach(function(k){if(p.has(k)){var el=$('vc-'+k);if(el)el.value=p.get(k);}});}\r\n    function renderFormulas(){try{\r\n        katex.render('p = \\\\frac{E \\\\cdot \\\\delta}{2d} \\\\cdot \\\\left(1 - \\\\frac{d^2}{D_r^2}\\\\right) \\\\quad [\\\\text{MPa}]',$('vc-katex-1'),{displayMode:true,throwOnError:false});\r\n        katex.render('F = p \\\\cdot \\\\pi \\\\cdot d \\\\cdot L \\\\cdot \\\\mu \\\\quad [\\\\text{N}]',$('vc-katex-2'),{displayMode:true,throwOnError:false});\r\n    }catch(e){}}\r\n    function init(){loadParams();renderFormulas();calculate();}\r\n    if(document.readyState==='loading'){document.addEventListener('DOMContentLoaded',init);}else{init();}\r\n})();\r\n<\/script>\r\n","protected":false},"excerpt":{"rendered":"<p>\u0411\u0435\u0437\u043a\u043e\u0448\u0442\u043e\u0432\u043d\u0438\u0439 \u043e\u043d\u043b\u0430\u0439\u043d-\u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440 \u0441\u0438\u043b\u0438 \u0437\u0430\u043f\u0440\u0435\u0441\u043e\u0432\u0443\u0432\u0430\u043d\u043d\u044f (\u0441\u043a\u043b\u0430\u0434\u0430\u043d\u043d\u044f) \u043f\u0456\u0434\u0448\u0438\u043f\u043d\u0438\u043a\u0430 \u0437\u0430 \u0440\u0456\u0432\u043d\u044f\u043d\u043d\u044f\u043c\u0438 \u041b\u0430\u043c\u0435. \u0412\u0432\u0435\u0434\u0456\u0442\u044c \u043e\u0442\u0432\u0456\u0440, \u0437\u043e\u0432\u043d\u0456\u0448\u043d\u0456\u0439 \u0434\u0456\u0430\u043c\u0435\u0442\u0440 \u0432\u0430\u043b\u0430, \u043a\u043e\u043d\u0442\u0430\u043a\u0442\u043d\u0443 \u0434\u043e\u0432\u0436\u0438\u043d\u0443 \u0442\u0430 \u043c\u0430\u0442\u0435\u0440\u0456\u0430\u043b, \u0449\u043e\u0431 \u043e\u0446\u0456\u043d\u0438\u0442\u0438 \u0441\u0438\u043b\u0443, \u043d\u0435\u043e\u0431\u0445\u0456\u0434\u043d\u0443 \u0434\u043b\u044f \u0445\u043e\u043b\u043e\u0434\u043d\u043e\u0433\u043e \u0437\u0430\u043f\u0440\u0435\u0441\u043e\u0432\u0443\u0432\u0430\u043d\u043d\u044f.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100025","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/uk\/wp-json\/wp\/v2\/calculator\/100025","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/uk\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/uk\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/uk\/wp-json\/wp\/v2\/calculator\/100025\/revisions"}],"predecessor-version":[{"id":102311,"href":"https:\/\/vibromera.eu\/uk\/wp-json\/wp\/v2\/calculator\/100025\/revisions\/102311"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/uk\/wp-json\/wp\/v2\/media?parent=100025"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/uk\/wp-json\/wp\/v2\/categories?post=100025"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/uk\/wp-json\/wp\/v2\/tags?post=100025"}],"curies":[{"name":"\u0412\u041f","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}