{"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":"2026-02-15T20:07:01","modified_gmt":"2026-02-15T20:07:01","slug":"bearing-press-fit-force","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/sw\/calculators\/bearing-press-fit-force\/","title":{"rendered":"Kikokotoo cha Nguvu ya Kusukuma Beari | Mlinganyo wa Lam\u00e9 | Zana ya Bure Mtandaoni"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Bearing Press-Fit Force Calculator\",\"description\":\"Estimate bearing press-in force for cold mounting using Lam\u00e9 equations.\",\"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\":\"2026-02-15\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"How is press-fit force calculated?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Press-fit force F = p \u00d7 \u03c0 \u00d7 d \u00d7 L \u00d7 \u03bc, where p is the interface pressure from Lam\u00e9's thick-cylinder equations, d is the bore, L is the contact length, and \u03bc is the assembly friction coefficient (typically 0.08-0.15 with oil).\"}},\n{\"@type\":\"Question\",\"name\":\"What friction coefficient should I use for assembly?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For assembly (pressing in), use \u03bc \u2248 0.08-0.12 with oil lubrication on the shaft. Dry assembly uses \u03bc \u2248 0.15-0.20. Always lubricate the shaft before pressing to reduce force and prevent scoring.\"}},\n{\"@type\":\"Question\",\"name\":\"When should I use hot mounting instead of cold pressing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Hot mounting (heating the bearing to 80-110\u00b0C) is recommended when: the interference is large (>0.001\u00d7d), the bearing bore exceeds 80mm, or the press-fit force exceeds the capacity of your press. Never heat above 120\u00b0C.\"}},\n{\"@type\":\"Question\",\"name\":\"What press capacity do I need?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The press must provide at least 1.5\u00d7 the calculated press-fit force to account for variations. For a typical 50mm bearing with normal interference, 5-20 kN (0.5-2 tonnes) is common. Larger bearings may require 50-100+ kN.\"}},\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.\"}}\n]}<\/script>\n\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>\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&#038;family=JetBrains+Mono:wght@400;500;600&#038;family=Fraunces:opsz,wght@9..144,700;9..144,800&#038;display=swap\" rel=\"stylesheet\">\n\n<link rel=\"stylesheet\" href=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.css\">\n\n<style>:root{--vc-bg:#f4f1ec;--vc-surface:#fff;--vc-surface-alt:#f8f6f2;--vc-ink:#1a1a1a;--vc-ink-secondary:#5a5650;--vc-ink-muted:#8a857e;--vc-accent:#c85a2a;--vc-accent-hover:#b04d22;--vc-accent-light:#fdf0ea;--vc-blue:#2a5c8c;--vc-blue-light:#eaf1f8;--vc-green:#2a7a4b;--vc-green-light:#eaf8ef;--vc-yellow:#a67c00;--vc-yellow-light:#fef9e8;--vc-red:#b91c1c;--vc-red-light:#fef2f2;--vc-border:#d9d4cc;--vc-border-light:#e8e4dd;--vc-shadow:0 1px 3px rgba(26,26,26,.06),0 4px 12px rgba(26,26,26,.04);--vc-radius:8px;--vc-radius-lg:12px;--vc-font:'DM Sans',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--vc-mono:'JetBrains Mono','Consolas','Monaco',monospace;--vc-display:'Fraunces',Georgia,serif}.vc-calculator{font-family:var(--vc-font);font-size:15px;line-height:1.65;color:var(--vc-ink);max-width:960px;margin:0 auto;padding:20px 16px 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.15s}.vc-faq-q:hover{background:#ede9e3}.vc-faq-chevron{width:16px;height:16px;color:var(--vc-ink-muted);flex-shrink:0;transition:transform .25s}.vc-faq-item.vc-open .vc-faq-chevron{transform:rotate(180deg)}.vc-faq-a{max-height:0;overflow:hidden;transition:max-height .35s}.vc-faq-item.vc-open .vc-faq-a{max-height:1200px}.vc-faq-a-inner{padding:14px 16px;border-top:1px solid 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 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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>\n\n<div class=\"vc-calculator\">\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 the axial force required to cold press-fit a bearing onto a shaft. Uses Lam\u00e9&#8217;s thick-cylinder equations with assembly friction coefficient.<\/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>\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\"><label class=\"vc-label\" for=\"vc-d\">Nominal Bore d <span class=\"vc-label-hint\">(mm)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-d\" inputmode=\"decimal\" step=\"any\" min=\"5\" value=\"50\"><\/div>\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=\"number\" id=\"vc-delta\" inputmode=\"decimal\" step=\"any\" min=\"0.001\" value=\"0.018\"><\/div>\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=\"number\" id=\"vc-L\" inputmode=\"decimal\" step=\"any\" min=\"1\" value=\"18\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-Do\">Outer Diameter of Ring <span class=\"vc-label-hint\">(mm, bearing OD)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-Do\" inputmode=\"decimal\" step=\"any\" min=\"10\" value=\"80\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-mu\">Assembly Friction \u03bc <span class=\"vc-label-hint\">(oiled \u2248 0.10, dry \u2248 0.18)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-mu\" inputmode=\"decimal\" step=\"any\" min=\"0.01\" max=\"1\" value=\"0.10\"><\/div>\n            <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-E\">Young&#8217;s Modulus E <span class=\"vc-label-hint\">(GPa, steel \u2248 210)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-E\" inputmode=\"decimal\" step=\"any\" min=\"1\" value=\"210\"><\/div>\n        <\/div>\n        <div class=\"vc-presets\"><div class=\"vc-presets-label\">Quick presets<\/div>\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\">6210 \/ \u03b4=18\u03bcm \/ oiled<\/button>\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\">6216 \/ \u03b4=25\u03bcm \/ oiled<\/button>\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\">6206 \/ \u03b4=13\u03bcm \/ oiled<\/button>\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\">6220 \/ \u03b4=35\u03bcm \/ oiled<\/button>\n        <\/div>\n    <\/form>\n    <div class=\"vc-results\" id=\"vc-results\">\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>\n        <div class=\"vc-result-grid\">\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>\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>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Force in tonnes<\/div><div class=\"vc-rcard-value\" id=\"vc-r-tons\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Recommended Press Capacity<\/div><div class=\"vc-rcard-value\" id=\"vc-r-press\">\u2014<\/div><\/div>\n            <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Hot Mounting Temperature<\/div><div class=\"vc-rcard-value\" id=\"vc-r-hot\">\u2014<\/div><\/div>\n        <\/div>\n    <\/div>\n<\/div>\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>\n    <div class=\"vc-section-body\"><div class=\"vc-section-inner vc-theory\">\n        <h3>Interface Pressure (Lam\u00e9)<\/h3><div class=\"vc-formula-box\" id=\"vc-katex-1\"><\/div>\n        <h3>Press-Fit Force<\/h3><div class=\"vc-formula-box\" id=\"vc-katex-2\"><\/div>\n        <ul><li><strong>\u03bc<\/strong> \u2014 assembly friction: 0.08\u20130.12 with oil, 0.15\u20130.20 dry<\/li><li><strong>\u03b4<\/strong> \u2014 diametral interference (shaft OD \u2212 bearing bore)<\/li><li><strong>d<\/strong> \u2014 nominal bore diameter<\/li><li><strong>D<sub>o<\/sub><\/strong> \u2014 bearing outer diameter<\/li><\/ul>\n        <h3>Hot Mounting Alternative<\/h3>\n        <div class=\"vc-info-box\"><p><strong>\u2139\ufe0f<\/strong> Heating the bearing to 80\u2013110\u00b0C expands the inner ring enough to slide onto the shaft without force. Required \u0394T \u2248 \u03b4 \/ (d \u00d7 \u03b1) + 10\u00b0C margin. Never exceed 120\u00b0C to avoid metallurgical changes.<\/p><\/div>\n        <h3>Practical Example<\/h3>\n        <div class=\"vc-example-box\"><div class=\"vc-example-title\">Example \u2014 6210 (50\u00d780\u00d718), \u03b4 = 0.018 mm<\/div>\n            <p>k = 50\/80 = 0.625<\/p>\n            <p>p = 210000 \u00d7 0.018 \/ (2 \u00d7 50) \u00d7 (1 \u2212 0.625\u00b2) = 23.3 MPa<\/p>\n            <p>F = 23.3 \u00d7 \u03c0 \u00d7 50 \u00d7 18 \u00d7 0.10 \/ 1000 = <strong>6.6 kN (0.67 tonnes)<\/strong><\/p>\n        <\/div>\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>\n    <\/div><\/div>\n<\/div>\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>\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>\n<\/div>\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>\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<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>\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;\">Calculator #058. Last updated: February 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>\n<\/div>\n<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/katex@0.16.11\/dist\/katex.min.js\"><\/script>\n<script>\n(function(){\n    'use strict';var SLUG='bearing-press-fit-force';\n    function $(id){return document.getElementById(id)}\n    function fmt(n,d){if(isNaN(n)||!isFinite(n))return'\u2014';return n.toFixed(d===undefined?1:d).replace(\/(\\.\\d*?)0+$\/,'$1').replace(\/\\.$\/,'')}\n\n    function calculate(){\n        var d=parseFloat($('vc-d').value),delta=parseFloat($('vc-delta').value),L=parseFloat($('vc-L').value);\n        var Do=parseFloat($('vc-Do').value),mu=parseFloat($('vc-mu').value),E_GPa=parseFloat($('vc-E').value);\n        if(!d||d<=0||!delta||delta<=0||!L||L<=0||!Do||Do<=d||!mu||!E_GPa){$('vc-results').classList.remove('vc-visible');return;}\n        var E=E_GPa*1000;\n        var k=d\/Do;\n        var p=E*delta\/(2*d)*(1-k*k);\n        var F=p*Math.PI*d*L*mu\/1000; \/\/ kN\n        var tons=F\/9.807;\n        var pressCapacity=F*1.5;\n        \/* Hot mounting temp: \u0394T = \u03b4\/(d\u00d7\u03b1) + 10\u00b0C margin, \u03b1 for steel \u2248 11.7e-6 *\/\n        var alpha=11.7e-6;\n        var hotDT=delta\/(d*alpha)+10;\n\n        $('vc-r-F').innerHTML=fmt(F,F<1?2:1)+' <span class=\"vc-rcard-unit\">kN<\/span>';\n        $('vc-r-p').innerHTML=fmt(p,1)+' <span class=\"vc-rcard-unit\">MPa<\/span>';\n        $('vc-r-tons').innerHTML=fmt(tons,2)+' <span class=\"vc-rcard-unit\">tonnes<\/span>';\n        $('vc-r-press').innerHTML='\u2265 '+fmt(pressCapacity,1)+' <span class=\"vc-rcard-unit\">kN (1.5\u00d7 safety)<\/span>';\n        $('vc-r-hot').innerHTML=fmt(hotDT,0)+' <span class=\"vc-rcard-unit\">\u00b0C above ambient<\/span>';\n        $('vc-results').classList.add('vc-visible');\n        var u=new URL(window.location);u.searchParams.set('d',d);u.searchParams.set('delta',delta);u.searchParams.set('L',L);u.searchParams.set('Do',Do);history.replaceState(null,'',u.toString());\n        saveHistory({d:d,delta:delta,L:L,Do:Do,mu:mu,_summary:'d='+d+' \u03b4='+delta+'mm \u2192 F='+fmt(F,1)+'kN'});\n    }\n\n    document.querySelectorAll('.vc-preset-btn').forEach(function(btn){btn.addEventListener('click',function(e){e.preventDefault();$('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');calculate();});});\n    $('vc-form').addEventListener('input',calculate);$('vc-form').addEventListener('change',calculate);\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, Do='+$('vc-Do').value+'mm, \u03bc='+$('vc-mu').value+'\\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);});}});\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    var faqData=[{q:'How is press-fit force calculated?',a:'<p>F = p \u00d7 \u03c0 \u00d7 d \u00d7 L \u00d7 \u03bc, where p is interface pressure from Lam\u00e9\\'s equations, d is bore, L is contact length, \u03bc is assembly friction coefficient (0.08\u20130.12 with oil).<\/p>'},{q:'What friction coefficient for assembly?',a:'<p>With oil: \u03bc \u2248 0.08\u20130.12. Dry: \u03bc \u2248 0.15\u20130.20. Always lubricate the shaft before pressing to reduce force and prevent scoring.<\/p>'},{q:'When should I use hot mounting?',a:'<p>When interference is large (>0.001\u00d7d), bore exceeds 80mm, or press force exceeds press capacity. Heat bearing to 80\u2013110\u00b0C. Never exceed 120\u00b0C.<\/p>'},{q:'What press capacity do I need?',a:'<p>At least 1.5\u00d7 the calculated force. For a 50mm bearing with normal interference, 5\u201320 kN is typical. Larger bearings may need 50\u2013100+ kN.<\/p>'},{q:'Can pressing damage the bearing?',a:'<p>Yes \u2014 always apply force ONLY to the ring being pressed (inner ring onto shaft, outer ring into housing). Never force through rolling elements.<\/p>'}];\n    var fl=$('vc-faq-list');faqData.forEach(function(f){fl.innerHTML+='<div class=\"vc-faq-item\"><button type=\"button\" class=\"vc-faq-q\"><span>'+f.q+'<\/span><svg class=\"vc-faq-chevron\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"><path d=\"M6 9l6 6 6-6\"\/><\/svg><\/button><div class=\"vc-faq-a\"><div class=\"vc-faq-a-inner\">'+f.a+'<\/div><\/div><\/div>';});\n    fl.addEventListener('click',function(e){var b=e.target.closest('.vc-faq-q');if(b)b.closest('.vc-faq-item').classList.toggle('vc-open');});\n    function saveHistory(entry){var key='vc_history_'+SLUG;var arr=[];try{arr=JSON.parse(localStorage.getItem(key))||[];}catch(e){}entry._ts=new Date().toISOString();arr.unshift(entry);if(arr.length>10)arr=arr.slice(0,10);try{localStorage.setItem(key,JSON.stringify(arr));}catch(e){}}\n    function loadParams(){var p=new URLSearchParams(window.location.search);p.forEach(function(v,k){var el=$(k)||$('vc-'+k);if(el)el.value=v;});}\n    function renderFormulas(){try{\n        katex.render('p = \\\\frac{E \\\\cdot \\\\delta}{2d} \\\\cdot \\\\left(1 - \\\\frac{d^2}{D_o^2}\\\\right) \\\\quad [\\\\text{MPa}]',$('vc-katex-1'),{displayMode:true,throwOnError:false});\n        katex.render('F = p \\\\cdot \\\\pi \\\\cdot d \\\\cdot L \\\\cdot \\\\mu \\\\quad [\\\\text{N}]',$('vc-katex-2'),{displayMode:true,throwOnError:false});\n    }catch(e){}}\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 mtandaoni cha nguvu ya kusukuma beari (ufungaji) kwa kutumia mlinganyo wa Lam\u00e9. Ingiza kipenyo cha ndani, kipenyo cha nje cha shimbo, urefu wa mawasiliano, na nyenzo ili kukadiri nguvu inayohitajika kwa ufungaji wa baridi wa kusukuma.<\/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\/sw\/wp-json\/wp\/v2\/calculator\/100025","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\/100025\/revisions"}],"predecessor-version":[{"id":100336,"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/calculator\/100025\/revisions\/100336"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/media?parent=100025"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/categories?post=100025"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/sw\/wp-json\/wp\/v2\/tags?post=100025"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}