{"id":100087,"date":"2026-02-15T20:17:31","date_gmt":"2026-02-15T20:17:31","guid":{"rendered":"https:\/\/vibromera.eu\/?post_type=calculator&#038;p=100087"},"modified":"2026-07-02T18:06:27","modified_gmt":"2026-07-02T18:06:27","slug":"eyebolt-load-iso3266","status":"publish","type":"calculator","link":"https:\/\/vibromera.eu\/uz\/calculators\/eyebolt-load-iso3266\/","title":{"rendered":"Ko'z bolt yuklamasi kalkulyatori | ISO 3266 | Burchakda kamaytirilgan ko'tarish qobiliyati"},"content":{"rendered":"\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"WebApplication\",\"name\":\"Eyebolt Load Calculator ISO 3266\",\"description\":\"Calculate the maximum working load of ISO 3266 grade 4 forged eyebolts for axial loading and for inclined loading as a pair (0\u201345\u00b0).\",\"url\":\"https:\/\/vibromera.eu\/calculators\/eyebolt-load-iso3266\/\",\"applicationCategory\":\"Engineering Calculator\",\"operatingSystem\":\"Any\",\"offers\":{\"@type\":\"Offer\",\"price\":\"0\",\"priceCurrency\":\"EUR\"},\"creator\":{\"@type\":\"Organization\",\"name\":\"Vibromera\",\"url\":\"https:\/\/vibromera.eu\/\"},\"datePublished\":\"2024-01-01\",\"dateModified\":\"2025-02-14\",\"inLanguage\":\"en\",\"isAccessibleForFree\":true}<\/script>\n\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"What is ISO 3266?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"ISO 3266 specifies forged steel eyebolts grade 4 for general lifting purposes. It defines the axial working load limit (WLL) and the maximum working load of a pair of eyebolts used for inclined loading at angles up to 45\u00b0.\"}},\n{\"@type\":\"Question\",\"name\":\"How does angle affect eyebolt capacity?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Inclined loading sharply reduces eyebolt capacity. Under ISO 3266, inclined loading is rated only for a pair of eyebolts: the pair may carry at most 1.4 \u00d7 WLL of one eyebolt (about 0.7 \u00d7 WLL per eyebolt) at angles from 0\u00b0 to 45\u00b0; loading beyond 45\u00b0 is not permitted. Stepped single-eyebolt reduction tables (e.g. 75\/50\/25% at 15\/30\/45\u00b0) are manufacturer-specific guidance for swivel eyebolts, not ISO 3266 \u2014 always verify against the manufacturer's certificate.\"}},\n{\"@type\":\"Question\",\"name\":\"Can regular eyebolts be loaded at an angle?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A single eyebolt should only be loaded axially (0\u00b0) \u2014 angular loading creates bending that can cause failure. Under ISO 3266, inclined loading is permitted only for a pair of eyebolts, with the plane of each eye aligned within \u00b15\u00b0 of the lifting plane and the angle not exceeding 45\u00b0. Swivel eyebolts are rated by their manufacturers, not by ISO 3266.\"}},\n{\"@type\":\"Question\",\"name\":\"What safety factor do eyebolts use?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"ISO 3266 eyebolts have a safety factor of 4:1 (MBL = 4 \u00d7 WLL). This is standard for forged lifting hardware.\"}},\n{\"@type\":\"Question\",\"name\":\"How do I mark eyebolts per ISO 3266?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Eyebolts must be marked with: WLL, manufacturer's mark, material grade, and the standard number (ISO 3266). Proof load testing is required.\"}}\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\":\"Eyebolt Load ISO 3266\",\"item\":\"https:\/\/vibromera.eu\/calculators\/eyebolt-load-iso3266\/\"}]}<\/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 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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>\n\n<div class=\"vc-calculator\">\n<header class=\"vc-header\"><p class=\"vc-header-eyebrow\">Free Engineering Tool #218<\/p><h1 class=\"vc-header-title\">Eyebolt Load Calculator \u2014 ISO 3266<\/h1><p class=\"vc-header-subtitle\">Calculate the maximum working load of ISO 3266 grade 4 forged eyebolts \u2014 axial (single eyebolt) or inclined loading as a pair (0\u201345\u00b0). Enter rated WLL and loading configuration.<\/p><div class=\"vc-badges\"><span class=\"vc-badge\">ISO 3266<\/span><span class=\"vc-badge\">Forged Grade 4<\/span><span class=\"vc-badge\">Pair Inclined Loading<\/span><\/div><\/header>\n<div class=\"vc-card\"><form class=\"vc-form\" id=\"vc-form\" autocomplete=\"off\"><div class=\"vc-form-grid\">\n    <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-wll\">Rated WLL (axial) <span class=\"vc-label-hint\">(tonnes)<\/span><\/label><input class=\"vc-input\" type=\"number\" id=\"vc-wll\" step=\"any\" min=\"0.01\" value=\"1\"><\/div>\n    <div class=\"vc-field\"><label class=\"vc-label\" for=\"vc-angle\">Loading Configuration <span class=\"vc-label-hint\">(per ISO 3266)<\/span><\/label><select class=\"vc-select\" id=\"vc-angle\"><option value=\"axial\">Single eyebolt, axial (\u03b2 = 0\u00b0) \u2014 100% WLL<\/option><option value=\"pair45\" selected>Pair of eyebolts, inclined 0\u00b0 &lt; \u03b2 \u2264 45\u00b0 \u2014 1.4 \u00d7 WLL (pair)<\/option><option value=\"over45\">Angle over 45\u00b0 \u2014 not permitted<\/option><\/select><\/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-w=\"1\" data-a=\"axial\">M12 1t axial<\/button>\n    <button type=\"button\" class=\"vc-preset-btn\" data-w=\"2\" data-a=\"pair45\">M16 2t pair \u226445\u00b0<\/button>\n    <button type=\"button\" class=\"vc-preset-btn\" data-w=\"5\" data-a=\"pair45\">M24 5t pair \u226445\u00b0<\/button>\n<\/div><\/form>\n<div class=\"vc-results\" id=\"vc-results\"><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\">Maximum Working Load<\/div><div class=\"vc-rcard-value\" id=\"vc-r-wll\">\u2014<\/div><\/div>\n    <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">Reduction Factor<\/div><div class=\"vc-rcard-value\" id=\"vc-r-factor\">\u2014<\/div><\/div>\n    <div class=\"vc-rcard\"><div class=\"vc-rcard-label\">MBL (4:1 SF)<\/div><div class=\"vc-rcard-value\" id=\"vc-r-mbl\">\u2014<\/div><\/div>\n<\/div><\/div><\/div>\n\n<div class=\"vc-section vc-open\"><button type=\"button\" class=\"vc-section-toggle\" aria-expanded=\"true\"><span class=\"vc-section-toggle-text\"><span class=\"vc-section-icon\">\ud83d\udcd8<\/span><span class=\"vc-section-title\">Theory &amp; ISO 3266 Factors<\/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>ISO 3266 Inclined-Loading Rules (Table 4)<\/h3>\n    <p>ISO 3266 covers forged steel eyebolts grade 4. A single eyebolt is rated at its marked WLL for axial loading only. Inclined loading is rated only for a <strong>pair<\/strong> of eyebolts: the maximum working load of the pair is 1.4 \u00d7 WLL of one eyebolt for angles 0\u00b0 &lt; \u03b2 \u2264 45\u00b0, with the plane of each eye aligned within \u00b15\u00b0 of the lifting plane.<\/p>\n    <table class=\"vc-table\"><thead><tr><th>Loading configuration<\/th><th>Factor<\/th><th>Maximum working load<\/th><\/tr><\/thead><tbody>\n        <tr><td>Single eyebolt, axial (\u03b2 = 0\u00b0)<\/td><td>1.00<\/td><td>100% of WLL<\/td><\/tr>\n        <tr><td>Pair of eyebolts, inclined 0\u00b0 &lt; \u03b2 \u2264 45\u00b0<\/td><td>1.40 (pair)<\/td><td>1.4 \u00d7 WLL for the pair (\u2248 0.7 \u00d7 WLL per eyebolt)<\/td><\/tr>\n        <tr><td>Any configuration, \u03b2 &gt; 45\u00b0<\/td><td>\u2014<\/td><td>Not permitted<\/td><\/tr>\n    <\/tbody><\/table>\n    <div class=\"vc-warning-box\"><p style=\"margin:0;font-size:14px;color:var(--vc-ink-secondary)\"><strong>\u26a0\ufe0f Important:<\/strong> A single eyebolt must only be loaded along its axis. ISO 3266 permits inclined loading only for a pair of eyebolts with correctly aligned eye planes (use shims if needed \u2014 never over-tighten). Stepped single-eyebolt reduction tables such as 75% \/ 50% \/ 25% at 15\u00b0 \/ 30\u00b0 \/ 45\u00b0 come from manufacturer catalogues for swivel or pivoting eyebolts, <strong>not<\/strong> from ISO 3266 \u2014 always verify the rating on the manufacturer&#8217;s certificate for the specific eyebolt.<\/p><\/div>\n<\/div><\/div><\/div>\n\n<div class=\"vc-section\"><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\/sling-capacity-angle\/\">Sling Capacity at Angle<\/a><a class=\"vc-related-link\" href=\"\/calculators\/wire-rope-capacity\/\">Wire Rope Capacity<\/a><a class=\"vc-related-link\" href=\"\/calculators\/center-of-gravity-calculator\/\">Center of Gravity<\/a><\/div><\/div><\/div><\/div>\n\n<div class=\"vc-section\"><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><\/div>\n\n<div class=\"vc-promo\"><div class=\"vc-promo-text\"><strong>Vibromera \u2014 Portable Balancing &amp; Vibration Analysis<\/strong><br>Professional instruments for industrial applications.<\/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\u20132025 <a href=\"https:\/\/vibromera.eu\/\">Vibromera<\/a> \u2014 Engineering Calculators<\/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';\n    var MODES={axial:{factor:1.0,label:'axial, single'},pair45:{factor:1.4,label:'pair, 0\u00b0 &lt; \u03b2 \u2264 45\u00b0'}};\n    function $(id){return document.getElementById(id)}\n    function fmt(n,d){if(isNaN(n))return'\u2014';return n.toFixed(d===undefined?2:d)}\n    function calculate(){\n        var wll=parseFloat($('vc-wll').value),mode=$('vc-angle').value;\n        if(!wll||wll<=0){$('vc-results').classList.remove('vc-visible');return}\n        if(mode==='over45'){\n            $('vc-r-wll').innerHTML='Not permitted <span class=\"vc-rcard-unit\">(\u03b2 &gt; 45\u00b0 \u2014 ISO 3266)<\/span>';\n            $('vc-r-factor').innerHTML='\u2014';\n            $('vc-r-mbl').innerHTML='\u2014';\n            $('vc-results').classList.add('vc-visible');return;\n        }\n        var m=MODES[mode]||MODES.axial;var reduced=wll*m.factor;\n        $('vc-r-wll').innerHTML=fmt(reduced,2)+' <span class=\"vc-rcard-unit\">tonnes'+(mode==='pair45'?' (for the pair)':'')+'<\/span>';\n        $('vc-r-factor').innerHTML=fmt(m.factor,2)+' <span class=\"vc-rcard-unit\">('+m.label+')<\/span>';\n        $('vc-r-mbl').innerHTML=fmt(reduced*4,1)+' <span class=\"vc-rcard-unit\">tonnes<\/span>';\n        $('vc-results').classList.add('vc-visible');\n    }\n    document.querySelectorAll('.vc-preset-btn').forEach(function(b){b.addEventListener('click',function(e){e.preventDefault();$('vc-wll').value=this.dataset.w;$('vc-angle').value=this.dataset.a;calculate()})});\n    $('vc-form').addEventListener('input',calculate);$('vc-form').addEventListener('change',calculate);\n    $('vc-copy-btn').addEventListener('click',function(){var t='Eyebolt WLL at angle: '+$('vc-r-wll').textContent;if(navigator.clipboard)navigator.clipboard.writeText(t)});\n    document.querySelectorAll('.vc-section-toggle').forEach(function(b){b.addEventListener('click',function(){var s=this.closest('.vc-section');s.classList.toggle('vc-open');this.setAttribute('aria-expanded',s.classList.contains('vc-open'))})});\n    var faqData=[\n        {q:'What is ISO 3266?',a:'<p>ISO 3266 specifies forged steel eyebolts grade 4 for general lifting purposes. It defines the axial WLL and the maximum working load of a pair of eyebolts used for inclined loading up to 45\u00b0.<\/p>'},\n        {q:'How does angle affect eyebolt capacity?',a:'<p>Under ISO 3266, inclined loading is rated only for a pair of eyebolts: max 1.4 \u00d7 WLL for the pair (\u2248 0.7 \u00d7 WLL per eyebolt) at 0\u00b0 &lt; \u03b2 \u2264 45\u00b0; beyond 45\u00b0 is not permitted. Stepped single-eyebolt tables (75\/50\/25%) are manufacturer guidance for swivel eyebolts, not ISO 3266.<\/p>'},\n        {q:'Can regular eyebolts be loaded at an angle?',a:'<p>A single eyebolt should only be loaded axially \u2014 angular loading creates bending that can cause failure. ISO 3266 permits inclined loading only for a pair of eyebolts with eye planes aligned within \u00b15\u00b0, up to 45\u00b0. Swivel eyebolts follow the manufacturer\\'s rating, not ISO 3266.<\/p>'},\n        {q:'What safety factor do eyebolts use?',a:'<p>ISO 3266: 4:1 safety factor (MBL = 4 \u00d7 WLL).<\/p>'},\n        {q:'How do I mark eyebolts per ISO 3266?',a:'<p>Mark with: WLL, manufacturer mark, material grade, and ISO 3266. Proof load testing required.<\/p>'}\n    ];\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 init(){calculate()}\n    if(document.readyState==='loading')document.addEventListener('DOMContentLoaded',init);else init();\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Bepul ISO 3266 ko'z boltiga yukni hisoblash kalkulyatori. Burchakli yuklanishda kamaytirilgan ko'tarish quvvatini aniqlang. SWL va ko'tarish burchagini kiriting va kamaytirilgan quvvatni oling.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-100087","calculator","type-calculator","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/uz\/wp-json\/wp\/v2\/calculator\/100087","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/uz\/wp-json\/wp\/v2\/calculator"}],"about":[{"href":"https:\/\/vibromera.eu\/uz\/wp-json\/wp\/v2\/types\/calculator"}],"version-history":[{"count":2,"href":"https:\/\/vibromera.eu\/uz\/wp-json\/wp\/v2\/calculator\/100087\/revisions"}],"predecessor-version":[{"id":102019,"href":"https:\/\/vibromera.eu\/uz\/wp-json\/wp\/v2\/calculator\/100087\/revisions\/102019"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/uz\/wp-json\/wp\/v2\/media?parent=100087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/uz\/wp-json\/wp\/v2\/categories?post=100087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/uz\/wp-json\/wp\/v2\/tags?post=100087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}