Bearing L10 Life Calculator | ISO 281 \/ ISO 76<\/title>\n <style>\n \/*\n * All styles scoped under #bearing-l10-calculator\n * Safe to embed in WordPress \u2014 will not affect theme or other page content.\n *\/\n #bearing-l10-calculator {\n --bl10-bg: #ffffff;\n --bl10-surface: #ffffff;\n --bl10-surface-2: #f5f7fa;\n --bl10-border: #d8dee8;\n --bl10-text: #1a2332;\n --bl10-muted: #64748b;\n --bl10-accent: #2563eb;\n --bl10-accent-dk: #1d4ed8;\n --bl10-success: #059669;\n --bl10-warning: #d97706;\n --bl10-danger: #dc2626;\n --bl10-radius: 10px;\n --bl10-shadow: 0 2px 12px rgba(0,0,0,.08);\n\n box-sizing: border-box;\n font-family: \"Segoe UI\", system-ui, -apple-system, sans-serif;\n font-size: 16px;\n line-height: 1.6;\n color: var(--bl10-text);\n background: var(--bl10-bg);\n max-width: 860px;\n margin: 0 auto;\n padding: 2rem 1.25rem 3rem;\n isolation: isolate;\n }\n\n #bearing-l10-calculator *,\n #bearing-l10-calculator *::before,\n #bearing-l10-calculator *::after {\n box-sizing: border-box;\n }\n\n \/* \u2500\u2500 Cards \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 *\/\n #bearing-l10-calculator .bl10-card {\n background: var(--bl10-surface);\n border: 1px solid var(--bl10-border);\n border-radius: var(--bl10-radius);\n padding: 1.5rem;\n margin-bottom: 1.25rem;\n box-shadow: var(--bl10-shadow);\n }\n\n #bearing-l10-calculator .bl10-card-title {\n font-size: .8rem;\n font-weight: 600;\n letter-spacing: .06em;\n text-transform: uppercase;\n color: var(--bl10-muted);\n margin: 0 0 1.25rem;\n padding: 0;\n display: flex;\n align-items: center;\n gap: .5rem;\n background: none;\n border: none;\n }\n\n #bearing-l10-calculator .bl10-card-title::before {\n content: \"\";\n display: inline-block;\n width: 3px;\n height: 1em;\n background: var(--bl10-accent);\n border-radius: 2px;\n }\n\n \/* \u2500\u2500 Form Grid \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 *\/\n #bearing-l10-calculator .bl10-form-grid {\n display: grid;\n grid-template-columns: 1fr 1fr;\n gap: 1rem;\n }\n\n @media (max-width: 560px) {\n #bearing-l10-calculator .bl10-form-grid { grid-template-columns: 1fr; }\n }\n\n #bearing-l10-calculator .bl10-field {\n display: flex;\n flex-direction: column;\n gap: .4rem;\n margin: 0;\n padding: 0;\n }\n\n #bearing-l10-calculator .bl10-label {\n font-size: .875rem;\n font-weight: 500;\n color: var(--bl10-text);\n margin: 0;\n padding: 0;\n display: block;\n cursor: default;\n }\n\n #bearing-l10-calculator .bl10-symbol {\n font-family: \"Cambria Math\", \"Times New Roman\", serif;\n font-style: italic;\n }\n\n #bearing-l10-calculator .bl10-unit {\n color: var(--bl10-muted);\n font-weight: 400;\n font-size: .8rem;\n }\n\n #bearing-l10-calculator .bl10-input {\n display: block;\n background: var(--bl10-surface-2);\n border: 1px solid var(--bl10-border);\n border-radius: 6px;\n color: var(--bl10-text);\n font-family: inherit;\n font-size: 1rem;\n line-height: 1.4;\n padding: .6rem .85rem;\n width: 100%;\n margin: 0;\n height: auto;\n min-height: 0;\n box-shadow: none;\n transition: border-color .15s, box-shadow .15s;\n -moz-appearance: textfield;\n appearance: textfield;\n }\n\n #bearing-l10-calculator .bl10-input::-webkit-outer-spin-button,\n #bearing-l10-calculator .bl10-input::-webkit-inner-spin-button {\n -webkit-appearance: none;\n margin: 0;\n }\n\n #bearing-l10-calculator .bl10-input:focus {\n outline: none;\n border-color: var(--bl10-accent);\n box-shadow: 0 0 0 3px rgba(37,99,235,.15);\n }\n\n #bearing-l10-calculator .bl10-input.bl10-invalid {\n border-color: var(--bl10-danger);\n box-shadow: 0 0 0 3px rgba(248,113,113,.15);\n }\n\n #bearing-l10-calculator .bl10-error-msg {\n font-size: .78rem;\n color: var(--bl10-danger);\n min-height: 1.1em;\n margin: 0;\n }\n\n \/* \u2500\u2500 Bearing Type Selector \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 *\/\n #bearing-l10-calculator .bl10-bearing-options {\n display: grid;\n grid-template-columns: 1fr 1fr;\n gap: .75rem;\n }\n\n @media (max-width: 400px) {\n #bearing-l10-calculator .bl10-bearing-options { grid-template-columns: 1fr; }\n }\n\n #bearing-l10-calculator .bl10-bearing-option {\n position: relative;\n margin: 0;\n padding: 0;\n }\n\n #bearing-l10-calculator .bl10-bearing-option input[type=\"radio\"] {\n position: absolute;\n opacity: 0;\n width: 0;\n height: 0;\n margin: 0;\n }\n\n #bearing-l10-calculator .bl10-option-label {\n display: flex;\n flex-direction: column;\n gap: .2rem;\n padding: .85rem 1rem;\n background: var(--bl10-surface-2);\n border: 2px solid var(--bl10-border);\n border-radius: 8px;\n cursor: pointer;\n transition: border-color .15s, background .15s;\n margin: 0;\n font-weight: normal;\n }\n\n #bearing-l10-calculator .bl10-bearing-option input:checked + .bl10-option-label {\n border-color: var(--bl10-accent);\n background: rgba(37,99,235,.06);\n }\n\n #bearing-l10-calculator .bl10-option-label:hover {\n border-color: rgba(37,99,235,.4);\n }\n\n #bearing-l10-calculator .bl10-option-name {\n font-weight: 600;\n font-size: .9rem;\n color: var(--bl10-text);\n }\n\n #bearing-l10-calculator .bl10-option-detail {\n font-size: .78rem;\n color: var(--bl10-muted);\n }\n\n \/* \u2500\u2500 Action Buttons \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 *\/\n #bearing-l10-calculator .bl10-actions {\n display: flex;\n justify-content: center;\n margin-top: 1.25rem;\n }\n\n #bearing-l10-calculator .bl10-btn {\n display: inline-block;\n width: 42%;\n min-width: 120px;\n padding: 1rem 1.5rem;\n border: none;\n border-radius: 6px;\n font-family: inherit;\n font-size: 1.1rem;\n font-weight: 600;\n line-height: 1.2;\n text-align: center;\n text-decoration: none;\n cursor: pointer;\n transition: background .15s, transform .1s;\n box-shadow: none;\n margin: 0;\n height: auto;\n }\n\n #bearing-l10-calculator .bl10-btn:active { transform: scale(.98); }\n\n #bearing-l10-calculator .bl10-btn-primary {\n background: var(--bl10-accent);\n color: #fff;\n }\n\n #bearing-l10-calculator .bl10-btn-primary:hover {\n background: var(--bl10-accent-dk);\n color: #fff;\n }\n\n \/* \u2500\u2500 Results \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 *\/\n #bearing-l10-calculator .bl10-results-grid {\n display: grid;\n grid-template-columns: 1fr 1fr;\n gap: 1rem;\n }\n\n @media (max-width: 480px) {\n #bearing-l10-calculator .bl10-results-grid { grid-template-columns: 1fr; }\n }\n\n #bearing-l10-calculator .bl10-result-box {\n background: var(--bl10-surface-2);\n border: 1px solid var(--bl10-border);\n border-radius: 8px;\n padding: 1.1rem 1.25rem;\n text-align: center;\n margin: 0;\n }\n\n #bearing-l10-calculator .bl10-result-label {\n font-size: .78rem;\n color: var(--bl10-muted);\n text-transform: uppercase;\n letter-spacing: .05em;\n margin: 0 0 .35rem;\n }\n\n #bearing-l10-calculator .bl10-result-value {\n font-size: clamp(1.6rem, 5vw, 2.2rem);\n font-weight: 700;\n color: var(--bl10-accent);\n line-height: 1.2;\n font-variant-numeric: tabular-nums;\n margin: 0;\n }\n\n #bearing-l10-calculator .bl10-result-unit {\n font-size: .85rem;\n color: var(--bl10-muted);\n margin: .2rem 0 0;\n }\n\n \/* \u2500\u2500 Assessment Banner \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 *\/\n #bearing-l10-calculator .bl10-assessment {\n margin-top: 1rem;\n padding: .9rem 1.1rem;\n border-radius: 8px;\n border-left: 4px solid;\n font-size: .875rem;\n }\n\n #bearing-l10-calculator .bl10-assessment.bl10-excellent { background: #ecfdf5; border-color: var(--bl10-success); color: #065f46; }\n #bearing-l10-calculator .bl10-assessment.bl10-good { background: #eff6ff; border-color: var(--bl10-accent); color: #1e40af; }\n #bearing-l10-calculator .bl10-assessment.bl10-acceptable { background: #fffbeb; border-color: var(--bl10-warning); color: #92400e; }\n #bearing-l10-calculator .bl10-assessment.bl10-poor { background: #fef2f2; border-color: var(--bl10-danger); color: #991b1b; }\n #bearing-l10-calculator .bl10-assessment.bl10-neutral { background: var(--bl10-surface-2); border-color: var(--bl10-border); color: var(--bl10-muted); }\n\n #bearing-l10-calculator .bl10-assessment strong {\n display: block;\n margin-bottom: .25rem;\n font-size: .9rem;\n font-weight: 700;\n }\n\n \/* Results hidden until Calculate is clicked (WordPress theme-safe) *\/\n #bearing-l10-calculator #bl10-resultsSection.bl10-is-hidden,\n #bearing-l10-calculator #bl10-resultsSection[hidden] {\n display: none !important;\n }\n <\/style>\n<\/head>\n<body>\n\n\n<div id=\"bearing-l10-calculator\">\n\n \n <section class=\"bl10-card\" aria-label=\"Input parameters\">\n <div class=\"bl10-card-title\">Input Parameters<\/div>\n\n <form id=\"bl10-calcForm\" novalidate>\n <div class=\"bl10-form-grid\">\n\n <div class=\"bl10-field\">\n <label class=\"bl10-label\" for=\"bl10-inputC\">\n Dynamic Load Rating <span class=\"bl10-symbol\">C<\/span>\n <span class=\"bl10-unit\">(kN)<\/span>\n <\/label>\n <input type=\"number\" class=\"bl10-input\" id=\"bl10-inputC\" name=\"bl10-C\" min=\"0\" step=\"any\"\n placeholder=\"e.g. 45.5\" aria-describedby=\"bl10-errC\">\n <span class=\"bl10-error-msg\" id=\"bl10-errC\" role=\"alert\"><\/span>\n <\/div>\n\n <div class=\"bl10-field\">\n <label class=\"bl10-label\" for=\"bl10-inputP\">\n Equivalent Dynamic Load <span class=\"bl10-symbol\">P<\/span>\n <span class=\"bl10-unit\">(kN)<\/span>\n <\/label>\n <input type=\"number\" class=\"bl10-input\" id=\"bl10-inputP\" name=\"bl10-P\" min=\"0\" step=\"any\"\n placeholder=\"e.g. 12.0\" aria-describedby=\"bl10-errP\">\n <span class=\"bl10-error-msg\" id=\"bl10-errP\" role=\"alert\"><\/span>\n <\/div>\n\n <div class=\"bl10-field\">\n <label class=\"bl10-label\" for=\"bl10-inputN\">\n Rotational Speed <span class=\"bl10-symbol\">n<\/span>\n <span class=\"bl10-unit\">(RPM)<\/span>\n <\/label>\n <input type=\"number\" class=\"bl10-input\" id=\"bl10-inputN\" name=\"bl10-n\" min=\"0\" step=\"any\"\n placeholder=\"e.g. 1500\" aria-describedby=\"bl10-errN\">\n <span class=\"bl10-error-msg\" id=\"bl10-errN\" role=\"alert\"><\/span>\n <\/div>\n\n <div class=\"bl10-field\">\n <span class=\"bl10-label\">Bearing Type <span class=\"bl10-unit\">(life exponent <span class=\"bl10-symbol\">k<\/span>)<\/span><\/span>\n <div class=\"bl10-bearing-options\" role=\"radiogroup\" aria-label=\"Bearing type\">\n <div class=\"bl10-bearing-option\">\n <input type=\"radio\" id=\"bl10-typeBall\" name=\"bl10-bearingType\" value=\"3\" checked>\n <label class=\"bl10-option-label\" for=\"bl10-typeBall\">\n <span class=\"bl10-option-name\">Ball Bearing<\/span>\n <span class=\"bl10-option-detail\"><span class=\"bl10-symbol\">k<\/span> = 3<\/span>\n <\/label>\n <\/div>\n <div class=\"bl10-bearing-option\">\n <input type=\"radio\" id=\"bl10-typeRoller\" name=\"bl10-bearingType\" value=\"3.333333\">\n <label class=\"bl10-option-label\" for=\"bl10-typeRoller\">\n <span class=\"bl10-option-name\">Roller Bearing<\/span>\n <span class=\"bl10-option-detail\"><span class=\"bl10-symbol\">k<\/span> = 10\/3 \u2248 3.333<\/span>\n <\/label>\n <\/div>\n <\/div>\n <\/div>\n\n <\/div>\n\n <div class=\"bl10-actions\">\n <button type=\"button\" class=\"bl10-btn bl10-btn-primary\" id=\"bl10-btnCalculate\">Calculate<\/button>\n <\/div>\n <\/form>\n <\/section>\n\n \n <section class=\"bl10-card bl10-is-hidden\" id=\"bl10-resultsSection\" aria-label=\"Calculation results\" aria-live=\"polite\" hidden>\n <div class=\"bl10-card-title\">Results<\/div>\n\n <div id=\"bl10-resultsPanel\">\n <div class=\"bl10-results-grid\">\n <div class=\"bl10-result-box\">\n <div class=\"bl10-result-label\">L<sub>10<\/sub> \u2014 Basic Rating Life<\/div>\n <div class=\"bl10-result-value\" id=\"bl10-outL10\">\u2014<\/div>\n <div class=\"bl10-result-unit\">million revolutions<\/div>\n <\/div>\n <div class=\"bl10-result-box\">\n <div class=\"bl10-result-label\">L<sub>10h<\/sub> \u2014 Operating Hours<\/div>\n <div class=\"bl10-result-value\" id=\"bl10-outL10h\">\u2014<\/div>\n <div class=\"bl10-result-unit\">hours<\/div>\n <\/div>\n <\/div>\n\n <div class=\"bl10-assessment bl10-neutral\" id=\"bl10-assessment\">\n <strong id=\"bl10-assessmentTitle\">Assessment<\/strong>\n <span id=\"bl10-assessmentText\"><\/span>\n <\/div>\n <\/div>\n <\/section>\n\n<\/div>\n\n<script>\n(function () {\n 'use strict';\n\n function initBl10Calculator() {\n var root = document.getElementById('bearing-l10-calculator');\n if (!root) return;\n\n var inputC = root.querySelector('#bl10-inputC');\n var inputP = root.querySelector('#bl10-inputP');\n var inputN = root.querySelector('#bl10-inputN');\n var btnCalculate = root.querySelector('#bl10-btnCalculate');\n var calcForm = root.querySelector('#bl10-calcForm');\n var resultsSection = root.querySelector('#bl10-resultsSection');\n var outL10 = root.querySelector('#bl10-outL10');\n var outL10h = root.querySelector('#bl10-outL10h');\n var assessment = root.querySelector('#bl10-assessment');\n var assessmentTitle = root.querySelector('#bl10-assessmentTitle');\n var assessmentText = root.querySelector('#bl10-assessmentText');\n\n if (!inputC || !inputP || !inputN || !btnCalculate || !resultsSection) return;\n\n var errorEls = {\n 'bl10-inputC': root.querySelector('#bl10-errC'),\n 'bl10-inputP': root.querySelector('#bl10-errP'),\n 'bl10-inputN': root.querySelector('#bl10-errN')\n };\n\n function validateField(input, rules) {\n var raw = input.value.trim();\n var errEl = errorEls[input.id];\n\n if (raw === '') {\n if (rules.required) {\n errEl.textContent = 'This field is required.';\n input.classList.add('bl10-invalid');\n return errEl.textContent;\n }\n errEl.textContent = '';\n input.classList.remove('bl10-invalid');\n return null;\n }\n\n var val = parseFloat(raw);\n\n if (isNaN(val)) {\n errEl.textContent = 'Please enter a valid number.';\n input.classList.add('bl10-invalid');\n return errEl.textContent;\n }\n\n if (rules.positive && 0 > val) {\n errEl.textContent = 'Value cannot be negative.';\n input.classList.add('bl10-invalid');\n return errEl.textContent;\n }\n\n if (rules.nonZero && val === 0) {\n errEl.textContent = rules.nonZeroMsg || 'Value cannot be zero.';\n input.classList.add('bl10-invalid');\n return errEl.textContent;\n }\n\n errEl.textContent = '';\n input.classList.remove('bl10-invalid');\n return null;\n }\n\n function validateAll() {\n var errors = [\n validateField(inputC, { required: true, positive: true, nonZero: true, nonZeroMsg: 'C must be greater than zero.' }),\n validateField(inputP, { required: true, positive: true, nonZero: true, nonZeroMsg: 'P must be greater than zero (division by zero).' }),\n validateField(inputN, { required: true, positive: true, nonZero: true, nonZeroMsg: 'Speed n must be greater than zero.' })\n ];\n return errors.every(function (e) { return e === null; });\n }\n\n function getExponent() {\n var checked = root.querySelector('input[name=\"bl10-bearingType\"]:checked');\n return checked ? parseFloat(checked.value) : 3;\n }\n\n function compute() {\n if (!validateAll()) return null;\n\n var C = parseFloat(inputC.value);\n var P = parseFloat(inputP.value);\n var n = parseFloat(inputN.value);\n var k = getExponent();\n var l10 = Math.pow(C \/ P, k);\n var l10h = (1000000 \/ (60 * n)) * l10;\n\n return { l10: l10, l10h: l10h };\n }\n\n function formatNumber(value) {\n if (value >= 1000000) return value.toExponential(3);\n if (value >= 1000) return value.toLocaleString('en-US', { maximumFractionDigits: 0 });\n if (value >= 100) return value.toFixed(1);\n if (value >= 1) return value.toFixed(2);\n if (value >= 0.01) return value.toFixed(3);\n return value.toExponential(3);\n }\n\n function getAssessment(l10h) {\n if (l10h >= 100000) {\n return {\n cls: 'bl10-excellent',\n title: 'Excellent Life Expectancy',\n text: 'L10h = ' + formatNumber(l10h) + ' h far exceeds the 50,000 h upper threshold for typical industrial machinery. This bearing selection provides a very generous safety margin.'\n };\n }\n if (l10h >= 50000) {\n return {\n cls: 'bl10-good',\n title: 'Above Typical Industrial Range',\n text: 'L10h = ' + formatNumber(l10h) + ' h exceeds the common 20,000-50,000 h target for industrial equipment. Suitable for long-service applications.'\n };\n }\n if (l10h >= 20000) {\n return {\n cls: 'bl10-good',\n title: 'Meets Industrial Standards',\n text: 'L10h = ' + formatNumber(l10h) + ' h falls within the typical 20,000-50,000 h range for general industrial machinery. A standard, acceptable selection.'\n };\n }\n if (l10h >= 5000) {\n return {\n cls: 'bl10-acceptable',\n title: 'Below Typical Industrial Range',\n text: 'L10h = ' + formatNumber(l10h) + ' h is below the 20,000 h minimum commonly expected for industrial machinery. Consider a higher-rated bearing or reduced load\/speed.'\n };\n }\n return {\n cls: 'bl10-poor',\n title: 'Short Service Life',\n text: 'L10h = ' + formatNumber(l10h) + ' h is well below industrial norms. Re-evaluate bearing size, load, or speed - premature failure is likely without redesign.'\n };\n }\n\n function hideResults() {\n resultsSection.classList.add('bl10-is-hidden');\n resultsSection.setAttribute('hidden', 'hidden');\n }\n\n function showResults() {\n resultsSection.classList.remove('bl10-is-hidden');\n resultsSection.removeAttribute('hidden');\n }\n\n function renderResults(result) {\n if (!result) {\n hideResults();\n return;\n }\n\n showResults();\n outL10.textContent = formatNumber(result.l10);\n outL10h.textContent = formatNumber(result.l10h);\n\n var assess = getAssessment(result.l10h);\n assessment.className = 'bl10-assessment ' + assess.cls;\n assessmentTitle.textContent = assess.title;\n assessmentText.textContent = assess.text;\n }\n\n function calculate(e) {\n if (e && e.preventDefault) e.preventDefault();\n renderResults(compute());\n }\n\n hideResults();\n\n btnCalculate.addEventListener('click', calculate);\n\n if (calcForm) {\n calcForm.addEventListener('submit', calculate);\n }\n }\n\n if (document.readyState === 'loading') {\n document.addEventListener('DOMContentLoaded', initBl10Calculator);\n } else {\n initBl10Calculator();\n }\n})();\n<\/script>\n\n<\/body>\n<\/html>\n\n","protected":false},"excerpt":{"rendered":"<p>The Bearing L10 Life Calculator is a practical engineering tool designed to estimate the basic rating life of rolling bearings under specified operating conditions. By…<\/p>","protected":false},"author":2,"featured_media":24615,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pmpro_default_level":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[8520],"tags":[8567,2904,8569,8568],"class_list":["post-24614","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mechanical-basic-component-design","tag-bearing-calculator","tag-bearing-design","tag-bearing-life","tag-l10-life","pmpro-has-access"],"acf":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.mechstream.com\/wp-content\/uploads\/2026\/08\/Bearing-L10-Life-Calculator.png","_links":{"self":[{"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/posts\/24614","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/comments?post=24614"}],"version-history":[{"count":5,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/posts\/24614\/revisions"}],"predecessor-version":[{"id":24620,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/posts\/24614\/revisions\/24620"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/media\/24615"}],"wp:attachment":[{"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/media?parent=24614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/categories?post=24614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/tags?post=24614"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":24614,"date":"2026-08-12T06:56:12","date_gmt":"2026-08-12T06:56:12","guid":{"rendered":"https:\/\/www.mechstream.com\/?p=24614"},"modified":"2026-08-12T07:09:01","modified_gmt":"2026-08-12T07:09:01","slug":"bearing-l10-life-calculator","status":"publish","type":"post","link":"https:\/\/www.mechstream.com\/ru\/bearing-l10-life-calculator\/","title":{"rendered":"Bearing L10\u00a0Life Calculator"},"content":{"rendered":"\n

The Bearing L10 Life Calculator<\/strong> is a practical engineering tool designed to estimate the basic rating life of rolling bearings under specified operating conditions. By entering key parameters such as dynamic load rating, equivalent dynamic bearing load, rotational speed, and bearing type, users can quickly estimate L10 bearing life in revolutions or operating hours. The Bearing L10 Life Calculator<\/strong> helps engineers and designers evaluate bearing durability, compare bearing selections, plan maintenance intervals, and improve the reliability of rotating equipment. It is suitable for gearboxes, motors, pumps, machine tools, industrial machinery, and other mechanical transmission systems. Whether selecting a new bearing or evaluating an existing design, this calculator provides a fast and convenient way to support bearing life analysis and equipment reliability.<\/p>\n\n\n\n\n\n\n \n \n Bearing L10 Life Calculator | ISO 281 \/ ISO 76<\/title>\n <style>\n \/*\n * All styles scoped under #bearing-l10-calculator\n * Safe to embed in WordPress \u2014 will not affect theme or other page content.\n *\/\n #bearing-l10-calculator {\n --bl10-bg: #ffffff;\n --bl10-surface: #ffffff;\n --bl10-surface-2: #f5f7fa;\n --bl10-border: #d8dee8;\n --bl10-text: #1a2332;\n --bl10-muted: #64748b;\n --bl10-accent: #2563eb;\n --bl10-accent-dk: #1d4ed8;\n --bl10-success: #059669;\n --bl10-warning: #d97706;\n --bl10-danger: #dc2626;\n --bl10-radius: 10px;\n --bl10-shadow: 0 2px 12px rgba(0,0,0,.08);\n\n box-sizing: border-box;\n font-family: \"Segoe UI\", system-ui, -apple-system, sans-serif;\n font-size: 16px;\n line-height: 1.6;\n color: var(--bl10-text);\n background: var(--bl10-bg);\n max-width: 860px;\n margin: 0 auto;\n padding: 2rem 1.25rem 3rem;\n isolation: isolate;\n }\n\n #bearing-l10-calculator *,\n #bearing-l10-calculator *::before,\n #bearing-l10-calculator *::after {\n box-sizing: border-box;\n }\n\n \/* \u2500\u2500 Cards \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 *\/\n #bearing-l10-calculator .bl10-card {\n background: var(--bl10-surface);\n border: 1px solid var(--bl10-border);\n border-radius: var(--bl10-radius);\n padding: 1.5rem;\n margin-bottom: 1.25rem;\n box-shadow: var(--bl10-shadow);\n }\n\n #bearing-l10-calculator .bl10-card-title {\n font-size: .8rem;\n font-weight: 600;\n letter-spacing: .06em;\n text-transform: uppercase;\n color: var(--bl10-muted);\n margin: 0 0 1.25rem;\n padding: 0;\n display: flex;\n align-items: center;\n gap: .5rem;\n background: none;\n border: none;\n }\n\n #bearing-l10-calculator .bl10-card-title::before {\n content: \"\";\n display: inline-block;\n width: 3px;\n height: 1em;\n background: var(--bl10-accent);\n border-radius: 2px;\n }\n\n \/* \u2500\u2500 Form Grid \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 *\/\n #bearing-l10-calculator .bl10-form-grid {\n display: grid;\n grid-template-columns: 1fr 1fr;\n gap: 1rem;\n }\n\n @media (max-width: 560px) {\n #bearing-l10-calculator .bl10-form-grid { grid-template-columns: 1fr; }\n }\n\n #bearing-l10-calculator .bl10-field {\n display: flex;\n flex-direction: column;\n gap: .4rem;\n margin: 0;\n padding: 0;\n }\n\n #bearing-l10-calculator .bl10-label {\n font-size: .875rem;\n font-weight: 500;\n color: var(--bl10-text);\n margin: 0;\n padding: 0;\n display: block;\n cursor: default;\n }\n\n #bearing-l10-calculator .bl10-symbol {\n font-family: \"Cambria Math\", \"Times New Roman\", serif;\n font-style: italic;\n }\n\n #bearing-l10-calculator .bl10-unit {\n color: var(--bl10-muted);\n font-weight: 400;\n font-size: .8rem;\n }\n\n #bearing-l10-calculator .bl10-input {\n display: block;\n background: var(--bl10-surface-2);\n border: 1px solid var(--bl10-border);\n border-radius: 6px;\n color: var(--bl10-text);\n font-family: inherit;\n font-size: 1rem;\n line-height: 1.4;\n padding: .6rem .85rem;\n width: 100%;\n margin: 0;\n height: auto;\n min-height: 0;\n box-shadow: none;\n transition: border-color .15s, box-shadow .15s;\n -moz-appearance: textfield;\n appearance: textfield;\n }\n\n #bearing-l10-calculator .bl10-input::-webkit-outer-spin-button,\n #bearing-l10-calculator .bl10-input::-webkit-inner-spin-button {\n -webkit-appearance: none;\n margin: 0;\n }\n\n #bearing-l10-calculator .bl10-input:focus {\n outline: none;\n border-color: var(--bl10-accent);\n box-shadow: 0 0 0 3px rgba(37,99,235,.15);\n }\n\n #bearing-l10-calculator .bl10-input.bl10-invalid {\n border-color: var(--bl10-danger);\n box-shadow: 0 0 0 3px rgba(248,113,113,.15);\n }\n\n #bearing-l10-calculator .bl10-error-msg {\n font-size: .78rem;\n color: var(--bl10-danger);\n min-height: 1.1em;\n margin: 0;\n }\n\n \/* \u2500\u2500 Bearing Type Selector \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 *\/\n #bearing-l10-calculator .bl10-bearing-options {\n display: grid;\n grid-template-columns: 1fr 1fr;\n gap: .75rem;\n }\n\n @media (max-width: 400px) {\n #bearing-l10-calculator .bl10-bearing-options { grid-template-columns: 1fr; }\n }\n\n #bearing-l10-calculator .bl10-bearing-option {\n position: relative;\n margin: 0;\n padding: 0;\n }\n\n #bearing-l10-calculator .bl10-bearing-option input[type=\"radio\"] {\n position: absolute;\n opacity: 0;\n width: 0;\n height: 0;\n margin: 0;\n }\n\n #bearing-l10-calculator .bl10-option-label {\n display: flex;\n flex-direction: column;\n gap: .2rem;\n padding: .85rem 1rem;\n background: var(--bl10-surface-2);\n border: 2px solid var(--bl10-border);\n border-radius: 8px;\n cursor: pointer;\n transition: border-color .15s, background .15s;\n margin: 0;\n font-weight: normal;\n }\n\n #bearing-l10-calculator .bl10-bearing-option input:checked + .bl10-option-label {\n border-color: var(--bl10-accent);\n background: rgba(37,99,235,.06);\n }\n\n #bearing-l10-calculator .bl10-option-label:hover {\n border-color: rgba(37,99,235,.4);\n }\n\n #bearing-l10-calculator .bl10-option-name {\n font-weight: 600;\n font-size: .9rem;\n color: var(--bl10-text);\n }\n\n #bearing-l10-calculator .bl10-option-detail {\n font-size: .78rem;\n color: var(--bl10-muted);\n }\n\n \/* \u2500\u2500 Action Buttons \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 *\/\n #bearing-l10-calculator .bl10-actions {\n display: flex;\n justify-content: center;\n margin-top: 1.25rem;\n }\n\n #bearing-l10-calculator .bl10-btn {\n display: inline-block;\n width: 42%;\n min-width: 120px;\n padding: 1rem 1.5rem;\n border: none;\n border-radius: 6px;\n font-family: inherit;\n font-size: 1.1rem;\n font-weight: 600;\n line-height: 1.2;\n text-align: center;\n text-decoration: none;\n cursor: pointer;\n transition: background .15s, transform .1s;\n box-shadow: none;\n margin: 0;\n height: auto;\n }\n\n #bearing-l10-calculator .bl10-btn:active { transform: scale(.98); }\n\n #bearing-l10-calculator .bl10-btn-primary {\n background: var(--bl10-accent);\n color: #fff;\n }\n\n #bearing-l10-calculator .bl10-btn-primary:hover {\n background: var(--bl10-accent-dk);\n color: #fff;\n }\n\n \/* \u2500\u2500 Results \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 *\/\n #bearing-l10-calculator .bl10-results-grid {\n display: grid;\n grid-template-columns: 1fr 1fr;\n gap: 1rem;\n }\n\n @media (max-width: 480px) {\n #bearing-l10-calculator .bl10-results-grid { grid-template-columns: 1fr; }\n }\n\n #bearing-l10-calculator .bl10-result-box {\n background: var(--bl10-surface-2);\n border: 1px solid var(--bl10-border);\n border-radius: 8px;\n padding: 1.1rem 1.25rem;\n text-align: center;\n margin: 0;\n }\n\n #bearing-l10-calculator .bl10-result-label {\n font-size: .78rem;\n color: var(--bl10-muted);\n text-transform: uppercase;\n letter-spacing: .05em;\n margin: 0 0 .35rem;\n }\n\n #bearing-l10-calculator .bl10-result-value {\n font-size: clamp(1.6rem, 5vw, 2.2rem);\n font-weight: 700;\n color: var(--bl10-accent);\n line-height: 1.2;\n font-variant-numeric: tabular-nums;\n margin: 0;\n }\n\n #bearing-l10-calculator .bl10-result-unit {\n font-size: .85rem;\n color: var(--bl10-muted);\n margin: .2rem 0 0;\n }\n\n \/* \u2500\u2500 Assessment Banner \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 *\/\n #bearing-l10-calculator .bl10-assessment {\n margin-top: 1rem;\n padding: .9rem 1.1rem;\n border-radius: 8px;\n border-left: 4px solid;\n font-size: .875rem;\n }\n\n #bearing-l10-calculator .bl10-assessment.bl10-excellent { background: #ecfdf5; border-color: var(--bl10-success); color: #065f46; }\n #bearing-l10-calculator .bl10-assessment.bl10-good { background: #eff6ff; border-color: var(--bl10-accent); color: #1e40af; }\n #bearing-l10-calculator .bl10-assessment.bl10-acceptable { background: #fffbeb; border-color: var(--bl10-warning); color: #92400e; }\n #bearing-l10-calculator .bl10-assessment.bl10-poor { background: #fef2f2; border-color: var(--bl10-danger); color: #991b1b; }\n #bearing-l10-calculator .bl10-assessment.bl10-neutral { background: var(--bl10-surface-2); border-color: var(--bl10-border); color: var(--bl10-muted); }\n\n #bearing-l10-calculator .bl10-assessment strong {\n display: block;\n margin-bottom: .25rem;\n font-size: .9rem;\n font-weight: 700;\n }\n\n \/* Results hidden until Calculate is clicked (WordPress theme-safe) *\/\n #bearing-l10-calculator #bl10-resultsSection.bl10-is-hidden,\n #bearing-l10-calculator #bl10-resultsSection[hidden] {\n display: none !important;\n }\n <\/style>\n<\/head>\n<body>\n\n\n<div id=\"bearing-l10-calculator\">\n\n \n <section class=\"bl10-card\" aria-label=\"Input parameters\">\n <div class=\"bl10-card-title\">Input Parameters<\/div>\n\n <form id=\"bl10-calcForm\" novalidate>\n <div class=\"bl10-form-grid\">\n\n <div class=\"bl10-field\">\n <label class=\"bl10-label\" for=\"bl10-inputC\">\n Dynamic Load Rating <span class=\"bl10-symbol\">C<\/span>\n <span class=\"bl10-unit\">(kN)<\/span>\n <\/label>\n <input type=\"number\" class=\"bl10-input\" id=\"bl10-inputC\" name=\"bl10-C\" min=\"0\" step=\"any\"\n placeholder=\"e.g. 45.5\" aria-describedby=\"bl10-errC\">\n <span class=\"bl10-error-msg\" id=\"bl10-errC\" role=\"alert\"><\/span>\n <\/div>\n\n <div class=\"bl10-field\">\n <label class=\"bl10-label\" for=\"bl10-inputP\">\n Equivalent Dynamic Load <span class=\"bl10-symbol\">P<\/span>\n <span class=\"bl10-unit\">(kN)<\/span>\n <\/label>\n <input type=\"number\" class=\"bl10-input\" id=\"bl10-inputP\" name=\"bl10-P\" min=\"0\" step=\"any\"\n placeholder=\"e.g. 12.0\" aria-describedby=\"bl10-errP\">\n <span class=\"bl10-error-msg\" id=\"bl10-errP\" role=\"alert\"><\/span>\n <\/div>\n\n <div class=\"bl10-field\">\n <label class=\"bl10-label\" for=\"bl10-inputN\">\n Rotational Speed <span class=\"bl10-symbol\">n<\/span>\n <span class=\"bl10-unit\">(RPM)<\/span>\n <\/label>\n <input type=\"number\" class=\"bl10-input\" id=\"bl10-inputN\" name=\"bl10-n\" min=\"0\" step=\"any\"\n placeholder=\"e.g. 1500\" aria-describedby=\"bl10-errN\">\n <span class=\"bl10-error-msg\" id=\"bl10-errN\" role=\"alert\"><\/span>\n <\/div>\n\n <div class=\"bl10-field\">\n <span class=\"bl10-label\">Bearing Type <span class=\"bl10-unit\">(life exponent <span class=\"bl10-symbol\">k<\/span>)<\/span><\/span>\n <div class=\"bl10-bearing-options\" role=\"radiogroup\" aria-label=\"Bearing type\">\n <div class=\"bl10-bearing-option\">\n <input type=\"radio\" id=\"bl10-typeBall\" name=\"bl10-bearingType\" value=\"3\" checked>\n <label class=\"bl10-option-label\" for=\"bl10-typeBall\">\n <span class=\"bl10-option-name\">Ball Bearing<\/span>\n <span class=\"bl10-option-detail\"><span class=\"bl10-symbol\">k<\/span> = 3<\/span>\n <\/label>\n <\/div>\n <div class=\"bl10-bearing-option\">\n <input type=\"radio\" id=\"bl10-typeRoller\" name=\"bl10-bearingType\" value=\"3.333333\">\n <label class=\"bl10-option-label\" for=\"bl10-typeRoller\">\n <span class=\"bl10-option-name\">Roller Bearing<\/span>\n <span class=\"bl10-option-detail\"><span class=\"bl10-symbol\">k<\/span> = 10\/3 \u2248 3.333<\/span>\n <\/label>\n <\/div>\n <\/div>\n <\/div>\n\n <\/div>\n\n <div class=\"bl10-actions\">\n <button type=\"button\" class=\"bl10-btn bl10-btn-primary\" id=\"bl10-btnCalculate\">Calculate<\/button>\n <\/div>\n <\/form>\n <\/section>\n\n \n <section class=\"bl10-card bl10-is-hidden\" id=\"bl10-resultsSection\" aria-label=\"Calculation results\" aria-live=\"polite\" hidden>\n <div class=\"bl10-card-title\">Results<\/div>\n\n <div id=\"bl10-resultsPanel\">\n <div class=\"bl10-results-grid\">\n <div class=\"bl10-result-box\">\n <div class=\"bl10-result-label\">L<sub>10<\/sub> \u2014 Basic Rating Life<\/div>\n <div class=\"bl10-result-value\" id=\"bl10-outL10\">\u2014<\/div>\n <div class=\"bl10-result-unit\">million revolutions<\/div>\n <\/div>\n <div class=\"bl10-result-box\">\n <div class=\"bl10-result-label\">L<sub>10h<\/sub> \u2014 Operating Hours<\/div>\n <div class=\"bl10-result-value\" id=\"bl10-outL10h\">\u2014<\/div>\n <div class=\"bl10-result-unit\">hours<\/div>\n <\/div>\n <\/div>\n\n <div class=\"bl10-assessment bl10-neutral\" id=\"bl10-assessment\">\n <strong id=\"bl10-assessmentTitle\">Assessment<\/strong>\n <span id=\"bl10-assessmentText\"><\/span>\n <\/div>\n <\/div>\n <\/section>\n\n<\/div>\n\n<script>\n(function () {\n 'use strict';\n\n function initBl10Calculator() {\n var root = document.getElementById('bearing-l10-calculator');\n if (!root) return;\n\n var inputC = root.querySelector('#bl10-inputC');\n var inputP = root.querySelector('#bl10-inputP');\n var inputN = root.querySelector('#bl10-inputN');\n var btnCalculate = root.querySelector('#bl10-btnCalculate');\n var calcForm = root.querySelector('#bl10-calcForm');\n var resultsSection = root.querySelector('#bl10-resultsSection');\n var outL10 = root.querySelector('#bl10-outL10');\n var outL10h = root.querySelector('#bl10-outL10h');\n var assessment = root.querySelector('#bl10-assessment');\n var assessmentTitle = root.querySelector('#bl10-assessmentTitle');\n var assessmentText = root.querySelector('#bl10-assessmentText');\n\n if (!inputC || !inputP || !inputN || !btnCalculate || !resultsSection) return;\n\n var errorEls = {\n 'bl10-inputC': root.querySelector('#bl10-errC'),\n 'bl10-inputP': root.querySelector('#bl10-errP'),\n 'bl10-inputN': root.querySelector('#bl10-errN')\n };\n\n function validateField(input, rules) {\n var raw = input.value.trim();\n var errEl = errorEls[input.id];\n\n if (raw === '') {\n if (rules.required) {\n errEl.textContent = 'This field is required.';\n input.classList.add('bl10-invalid');\n return errEl.textContent;\n }\n errEl.textContent = '';\n input.classList.remove('bl10-invalid');\n return null;\n }\n\n var val = parseFloat(raw);\n\n if (isNaN(val)) {\n errEl.textContent = 'Please enter a valid number.';\n input.classList.add('bl10-invalid');\n return errEl.textContent;\n }\n\n if (rules.positive && 0 > val) {\n errEl.textContent = 'Value cannot be negative.';\n input.classList.add('bl10-invalid');\n return errEl.textContent;\n }\n\n if (rules.nonZero && val === 0) {\n errEl.textContent = rules.nonZeroMsg || 'Value cannot be zero.';\n input.classList.add('bl10-invalid');\n return errEl.textContent;\n }\n\n errEl.textContent = '';\n input.classList.remove('bl10-invalid');\n return null;\n }\n\n function validateAll() {\n var errors = [\n validateField(inputC, { required: true, positive: true, nonZero: true, nonZeroMsg: 'C must be greater than zero.' }),\n validateField(inputP, { required: true, positive: true, nonZero: true, nonZeroMsg: 'P must be greater than zero (division by zero).' }),\n validateField(inputN, { required: true, positive: true, nonZero: true, nonZeroMsg: 'Speed n must be greater than zero.' })\n ];\n return errors.every(function (e) { return e === null; });\n }\n\n function getExponent() {\n var checked = root.querySelector('input[name=\"bl10-bearingType\"]:checked');\n return checked ? parseFloat(checked.value) : 3;\n }\n\n function compute() {\n if (!validateAll()) return null;\n\n var C = parseFloat(inputC.value);\n var P = parseFloat(inputP.value);\n var n = parseFloat(inputN.value);\n var k = getExponent();\n var l10 = Math.pow(C \/ P, k);\n var l10h = (1000000 \/ (60 * n)) * l10;\n\n return { l10: l10, l10h: l10h };\n }\n\n function formatNumber(value) {\n if (value >= 1000000) return value.toExponential(3);\n if (value >= 1000) return value.toLocaleString('en-US', { maximumFractionDigits: 0 });\n if (value >= 100) return value.toFixed(1);\n if (value >= 1) return value.toFixed(2);\n if (value >= 0.01) return value.toFixed(3);\n return value.toExponential(3);\n }\n\n function getAssessment(l10h) {\n if (l10h >= 100000) {\n return {\n cls: 'bl10-excellent',\n title: 'Excellent Life Expectancy',\n text: 'L10h = ' + formatNumber(l10h) + ' h far exceeds the 50,000 h upper threshold for typical industrial machinery. This bearing selection provides a very generous safety margin.'\n };\n }\n if (l10h >= 50000) {\n return {\n cls: 'bl10-good',\n title: 'Above Typical Industrial Range',\n text: 'L10h = ' + formatNumber(l10h) + ' h exceeds the common 20,000-50,000 h target for industrial equipment. Suitable for long-service applications.'\n };\n }\n if (l10h >= 20000) {\n return {\n cls: 'bl10-good',\n title: 'Meets Industrial Standards',\n text: 'L10h = ' + formatNumber(l10h) + ' h falls within the typical 20,000-50,000 h range for general industrial machinery. A standard, acceptable selection.'\n };\n }\n if (l10h >= 5000) {\n return {\n cls: 'bl10-acceptable',\n title: 'Below Typical Industrial Range',\n text: 'L10h = ' + formatNumber(l10h) + ' h is below the 20,000 h minimum commonly expected for industrial machinery. Consider a higher-rated bearing or reduced load\/speed.'\n };\n }\n return {\n cls: 'bl10-poor',\n title: 'Short Service Life',\n text: 'L10h = ' + formatNumber(l10h) + ' h is well below industrial norms. Re-evaluate bearing size, load, or speed - premature failure is likely without redesign.'\n };\n }\n\n function hideResults() {\n resultsSection.classList.add('bl10-is-hidden');\n resultsSection.setAttribute('hidden', 'hidden');\n }\n\n function showResults() {\n resultsSection.classList.remove('bl10-is-hidden');\n resultsSection.removeAttribute('hidden');\n }\n\n function renderResults(result) {\n if (!result) {\n hideResults();\n return;\n }\n\n showResults();\n outL10.textContent = formatNumber(result.l10);\n outL10h.textContent = formatNumber(result.l10h);\n\n var assess = getAssessment(result.l10h);\n assessment.className = 'bl10-assessment ' + assess.cls;\n assessmentTitle.textContent = assess.title;\n assessmentText.textContent = assess.text;\n }\n\n function calculate(e) {\n if (e && e.preventDefault) e.preventDefault();\n renderResults(compute());\n }\n\n hideResults();\n\n btnCalculate.addEventListener('click', calculate);\n\n if (calcForm) {\n calcForm.addEventListener('submit', calculate);\n }\n }\n\n if (document.readyState === 'loading') {\n document.addEventListener('DOMContentLoaded', initBl10Calculator);\n } else {\n initBl10Calculator();\n }\n})();\n<\/script>\n\n<\/body>\n<\/html>\n\n","protected":false},"excerpt":{"rendered":"<p>The Bearing L10 Life Calculator is a practical engineering tool designed to estimate the basic rating life of rolling bearings under specified operating conditions. By…<\/p>","protected":false},"author":2,"featured_media":24615,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pmpro_default_level":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[8520],"tags":[8567,2904,8569,8568],"class_list":["post-24614","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mechanical-basic-component-design","tag-bearing-calculator","tag-bearing-design","tag-bearing-life","tag-l10-life","pmpro-has-access"],"acf":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.mechstream.com\/wp-content\/uploads\/2026\/08\/Bearing-L10-Life-Calculator.png","_links":{"self":[{"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/posts\/24614","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/comments?post=24614"}],"version-history":[{"count":5,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/posts\/24614\/revisions"}],"predecessor-version":[{"id":24620,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/posts\/24614\/revisions\/24620"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/media\/24615"}],"wp:attachment":[{"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/media?parent=24614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/categories?post=24614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mechstream.com\/ru\/wp-json\/wp\/v2\/tags?post=24614"}],"curies":[{"name":"WP","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}