{"id":17088,"date":"2026-06-12T02:38:03","date_gmt":"2026-06-12T02:38:03","guid":{"rendered":"https:\/\/www.dgcrane.com\/?p=17088"},"modified":"2026-06-15T05:46:38","modified_gmt":"2026-06-15T05:46:38","slug":"crane-sheave-minimum-diameter-calculator","status":"publish","type":"post","link":"https:\/\/www.dgcrane.com\/no\/crane-sheave-minimum-diameter-calculator\/","title":{"rendered":"Kalkulator for minimum diameter p\u00e5 kranskive"},"content":{"rendered":"<div id=\"calculator\">\n    <style>\n        #calculator {\n            --primary-color: #0a3487;\n            --primary-hover: #F58423;\n            --error-color: #e53935;\n            --bg-color: #EAEEF7;\n            --text-color: #4a4a4a;\n            max-width: 545px;\n            padding: 30px;\n            background-color: var(--bg-color);\n            color: var(--text-color);\n            font-family: Arial, sans-serif;\n            box-sizing: border-box;\n        }\n\n        #calculator .calc-title {\n            font-size: 18px;\n            margin: 0 0 20px 0;\n            text-align: center;\n            font-weight: 600;\n        }\n\n        #calculator .calc-row {\n            margin-bottom: 18px;\n        }\n\n        #calculator label {\n            display: block;\n            font-size: 14px;\n            margin-bottom: 6px;\n        }\n\n        #calculator input,\n        #calculator select {\n            width: 100%;\n            height: 36px;\n            padding: 0 10px;\n            border: 1px solid #ccc;\n            border-radius: 0;\n            font-size: 16px;\n            box-sizing: border-box;\n            transition: border 0.2s ease;\n            background: #fff;\n        }\n\n        #calculator input:focus,\n        #calculator select:focus {\n            outline: none;\n            border: 2px solid var(--primary-color);\n        }\n\n        #calculator .input-error {\n            border: 2px solid var(--error-color) !important;\n        }\n\n        #calculator .error-msg {\n            display: none;\n            font-size: 12px;\n            color: var(--error-color);\n            margin-top: 4px;\n        }\n\n        #calculator .error-msg.show {\n            display: block;\n        }\n\n        #calculator .btn-group {\n            display: flex;\n            gap: 10px;\n            margin: 20px 0;\n        }\n\n        #calculator button {\n            flex: 1;\n            height: 34px;\n            line-height: 34px;\n            border: none;\n            border-radius: 0;\n            font-size: 14px;\n            cursor: pointer;\n            transition: background-color 0.2s ease;\n            background-color: var(--primary-color);\n            color: #fff;\n        }\n\n        #calculator button:hover {\n            background-color: var(--primary-hover);\n        }\n\n        #calculator .result-wrap {\n            margin-top: 20px;\n            padding: 12px;\n            border: 1px solid #ccc;\n            background: #fff;\n        }\n\n        #calculator .result-text {\n            font-size: 16px;\n            line-height: 26px;\n            min-height: 40px;\n        }\n\n        #calculator .result-group {\n            margin: 8px 0;\n            padding: 6px 0;\n            border-bottom: 1px dashed #eee;\n        }\n\n        #calculator .result-group:last-child {\n            border-bottom: none;\n        }\n\n        @media (max-width: 768px) {\n            #calculator input,\n            #calculator select {\n                height: 0.7rem;\n                font-size: 0.28rem;\n            }\n            #calculator label,\n            #calculator button,\n            #calculator .result-text {\n                font-size: 0.28rem;\n            }\n            #calculator .btn-group {\n                flex-direction: column;\n            }\n            #calculator button {\n                width: 100%;\n                height: 0.7rem;\n                line-height: 0.7rem;\n            }\n        }\n    <\/style>\n\n    <h3 class=\"calc-title\">Kalkulator for minimum diameter p\u00e5 kranskive<\/h3>\n\n    <!-- Crane Type -->\n    <div class=\"calc-row\">\n        <label for=\"calculator-craneType\">Krantype<\/label>\n        <select id=\"calculator-craneType\">\n            <option value=\"normal\">Traverskraner<\/option>\n            <option value=\"normal\">Portal- eller semiportalkraner<\/option>\n            <option value=\"normal\">Portal- eller semiportalbrokraner<\/option>\n            <option value=\"normal\">Cantileverkraner (s\u00f8yle-, jib-, vegg- eller g\u00e5ende)<\/option>\n            <option value=\"mobile\">Mobilkran<\/option>\n        <\/select>\n    <\/div>\n\n    <!-- Normal Crane Area -->\n    <div id=\"calculator-normalWrap\">\n        <div class=\"calc-row\">\n            <label for=\"calculator-normalDuty\">Driftsklasse (ISO 4301-1)<\/label>\n            <select id=\"calculator-normalDuty\">\n                <option value=\"M1\">M1<\/option>\n                <option value=\"M2\">M2<\/option>\n                <option value=\"M3\">M3<\/option>\n                <option value=\"M4\">M4<\/option>\n                <option value=\"M5\">M5<\/option>\n                <option value=\"M6\">M6<\/option>\n                <option value=\"M7\">M7<\/option>\n                <option value=\"M8\">M8<\/option>\n            <\/select>\n        <\/div>\n        <div class=\"calc-row\">\n            <label for=\"calculator-normalType\">Skivekategori<\/label>\n            <select id=\"calculator-normalType\">\n                <option value=\"main\">Hovedarbeidsskive (h\u2082)<\/option>\n                <option value=\"balance\">Balanseskive (h\u2083)<\/option>\n            <\/select>\n        <\/div>\n    <\/div>\n\n    <!-- Mobile Crane Area -->\n    <div id=\"calculator-mobileWrap\" style=\"display: none;\">\n        <div class=\"calc-row\">\n            <label for=\"calculator-mobileCat\">Skivekategori<\/label>\n            <select id=\"calculator-mobileCat\">\n                <option value=\"h2\">Hovedarbeidsskive (h\u2082)<\/option>\n                <option value=\"h3\">Balanseskive (h\u2083)<\/option>\n            <\/select>\n        <\/div>\n        <div class=\"calc-row\">\n            <label for=\"calculator-mobileSelect\">Mekanismetype<\/label>\n            <select id=\"calculator-mobileSelect\">\n                <option value=\"lift\">L\u00f8ftemekanisme<\/option>\n                <option value=\"jib\">Jib-\/lufsemekanisme<\/option>\n                <option value=\"telescope\">Teleskopmekanisme<\/option>\n            <\/select>\n        <\/div>\n        <div class=\"calc-row\">\n            <label for=\"calculator-ropeType\">Tautype<\/label>\n            <select id=\"calculator-ropeType\">\n                <option value=\"std\">Standard tau<\/option>\n                <option value=\"anti\">Rotasjonsbestandig tau<\/option>\n            <\/select>\n        <\/div>\n    <\/div>\n\n    <!-- Rope Strand Coefficient t -->\n    <div class=\"calc-row\">\n        <label for=\"calculator-ropeT\">Tautr\u00e5dkoeffisient (t)<\/label>\n        <select id=\"calculator-ropeT\">\n            <option value=\"1.25\">3 tr\u00e5der (t=1,25)<\/option>\n            <option value=\"1.15\">4~5 tr\u00e5der (t=1,15)<\/option>\n            <option value=\"1.00\">6~10 tr\u00e5der (t=1,00)<\/option>\n            <option value=\"0.95\">8~10 tr\u00e5der plastfylt (t=0,95)<\/option>\n            <option value=\"1.00\">10+ tr\u00e5der rotasjonsbestandig (t=1,00)<\/option>\n        <\/select>\n    <\/div>\n\n    <!-- Wire Rope Diameter d -->\n    <div class=\"calc-row\">\n        <label for=\"calculator-ropeD\">St\u00e5ltaudiameter d (mm)<\/label>\n        <input type=\"number\" id=\"calculator-ropeD\" placeholder=\"Skriv inn diameter\">\n        <div class=\"error-msg\" id=\"calculator-dErr\">Vennligst skriv inn gyldig diameter &gt; 0<\/div>\n    <\/div>\n\n    <!-- Buttons -->\n    <div class=\"btn-group\">\n        <button id=\"calculator-btnCalc\">Kalkulere<\/button>\n        <button id=\"calculator-btnReset\">Tilbakestill<\/button>\n    <\/div>\n\n    <!-- Result -->\n    <div class=\"result-wrap\">\n        <div class=\"result-text\" id=\"calculator-resultBox\">Resultatet vil bli vist her<\/div>\n    <\/div>\n\n    <script>\n        (function() {\n            const craneType = document.getElementById('calculator-craneType');\n            const normalWrap = document.getElementById('calculator-normalWrap');\n            const mobileWrap = document.getElementById('calculator-mobileWrap');\n            const normalDuty = document.getElementById('calculator-normalDuty');\n            const normalSheaveType = document.getElementById('calculator-normalType');\n            const mobileCat = document.getElementById('calculator-mobileCat');\n            const mobileSelect = document.getElementById('calculator-mobileSelect');\n            const ropeType = document.getElementById('calculator-ropeType');\n            const ropeT = document.getElementById('calculator-ropeT');\n            const ropeD = document.getElementById('calculator-ropeD');\n            const btnCalc = document.getElementById('calculator-btnCalc');\n            const btnReset = document.getElementById('calculator-btnReset');\n            const resultBox = document.getElementById('calculator-resultBox');\n            const dErr = document.getElementById('calculator-dErr');\n            const PREFERRED_H = 20;\n\n            \/\/ Switch crane type display\n            craneType.addEventListener('change', function() {\n                if (this.value === 'mobile') {\n                    normalWrap.style.display = 'none';\n                    mobileWrap.style.display = 'block';\n                } else {\n                    normalWrap.style.display = 'block';\n                    mobileWrap.style.display = 'none';\n                }\n                resultBox.textContent = 'Result will be displayed here';\n                clearInputError();\n            });\n\n            \/\/ Clear error\n            function clearInputError() {\n                ropeD.classList.remove('input-error');\n                dErr.classList.remove('show');\n            }\n\n            \/\/ Input validation\n            function validateInput() {\n                clearInputError();\n                const dVal = parseFloat(ropeD.value);\n                if (isNaN(dVal) || dVal <= 0) {\n                    ropeD.classList.add('input-error');\n                    dErr.classList.add('show');\n                    return false;\n                }\n                return true;\n            }\n            ropeD.addEventListener('input', validateInput);\n\n            \/\/ Normal crane h value map\n            const normalHMap = {\n                M1: { h2:12.5, h3_min:11.2, h3_opt:12.5 },\n                M2: { h2:14.0, h3_min:12.5, h3_opt:14.0 },\n                M3: { h2:16.0, h3_min:14.0, h3_opt:16.0 },\n                M4: { h2:18.0, h3_min:16.0, h3_opt:18.0 },\n                M5: { h2:20.0, h3_min:18.0, h3_opt:20.0 },\n                M6: { h2:22.4, h3_min:20.0, h3_opt:22.4 },\n                M7: { h2:25.0, h3_min:22.4, h3_opt:25.0 },\n                M8: { h2:28.0, h3_min:25.0, h3_opt:28.0 }\n            };\n\n            \/\/ Mobile crane standard h value map\n            const mobileHMap = {\n                h2: {\n                    lift: { std:18, anti:18 },\n                    jib: { std:16, anti:16 },\n                    telescope: { std:14, anti:14 }\n                },\n                h3: {\n                    lift: { std:14, anti:18 },\n                    jib: { std:12.5, anti:16 },\n                    telescope: { std:10, anti:10 }\n                }\n            };\n\n            \/\/ Calculate\n            btnCalc.addEventListener('click', function() {\n                resultBox.innerHTML = '';\n                if (!validateInput()) return;\n                const t = parseFloat(ropeT.value);\n                const d = parseFloat(ropeD.value);\n                const craneCat = craneType.value;\n                let html = '';\n\n                \/\/ Non-mobile crane\n                if (craneCat === 'normal') {\n                    const dutyKey = normalDuty.value;\n                    const sheaveCat = normalSheaveType.value;\n                    const hData = normalHMap[dutyKey];\n                    if (sheaveCat === 'main') {\n                        const D2 = (hData.h2 * t * d).toFixed(2);\n                        html = `<div class=\"result-group\">Main Working Sheave Minimum Diameter D\u2082 \u2265 ${D2} mm<\/div>`;\n                    } else {\n                        const D3_min = (hData.h3_min * t * d).toFixed(2);\n                        const D3_opt = (hData.h3_opt * t * d).toFixed(2);\n                        html = `\n                            <div class=\"result-group\">\n                                <strong>Balance Sheave Minimum Required:<\/strong><br>\n                                D\u2083 \u2265 ${D3_min} mm\n                            <\/div>\n                            <div class=\"result-group\">\n                                <strong>Balance Sheave Preferred Value:<\/strong><br>\n                                D\u2083 \u2265 ${D3_opt} mm\n                            <\/div>\n                        `;\n                    }\n                }\n                \/\/ Mobile crane\n                else {\n                    const sCat = mobileCat.value;\n                    const mech = mobileSelect.value;\n                    const rType = ropeType.value;\n                    const minH = mobileHMap[sCat][mech][rType];\n                    const isAnti = rType === 'anti';\n\n                    const minD = (minH * t * d).toFixed(2);\n                    const preferredD = (PREFERRED_H * t * d).toFixed(2);\n\n                    if (!isAnti) {\n                        html = `<div class=\"result-group\">Minimum Required Value: D \u2265 ${minD} mm<\/div>`;\n                    } else {\n                        html = `\n                            <div class=\"result-group\">\n                                <strong>Minimum Required Value:<\/strong><br>\n                                D \u2265 ${minD} mm\n                            <\/div>\n                            <div class=\"result-group\">\n                                <strong>Preferred Minimum Value (Recommended):<\/strong><br>\n                                D \u2265 ${preferredD} mm\n                            <\/div>\n                        `;\n                    }\n                }\n                resultBox.innerHTML = html;\n            });\n\n            \/\/ Reset\n            btnReset.addEventListener('click', function() {\n                craneType.selectedIndex = 0;\n                normalDuty.selectedIndex = 0;\n                normalSheaveType.selectedIndex = 0;\n                mobileCat.selectedIndex = 0;\n                mobileSelect.selectedIndex = 0;\n                ropeType.selectedIndex = 0;\n                ropeT.selectedIndex = 0;\n                ropeD.value = '';\n                resultBox.textContent = 'Result will be displayed here';\n                normalWrap.style.display = 'block';\n                mobileWrap.style.display = 'none';\n                clearInputError();\n            });\n        })();\n    <\/script>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Kalkulator for minimum diameter p\u00e5 kranskive <br>Formel<\/h2>\n\n\n\n<p>D<sub>2<\/sub>\u2265t<sub>2<\/sub>\u00d7t\u00d7d<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>D<sub>2<\/sub>Minimum stigningssirkeldiameter p\u00e5 skiven<\/li>\n\n\n\n<li>h<sub>2<\/sub>Skivevalgsfaktor (forholdet mellom skivens stigningssirkeldiameter og nominell <br>diameteren p\u00e5 st\u00e5ltauet)<\/li>\n\n\n\n<li>t: Faktor for st\u00e5ltautype<\/li>\n\n\n\n<li>d: Nominell diameter p\u00e5 st\u00e5ltauet<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Notater<\/h2>\n\n\n\n<p>Utvalgskoeffisientene for skiver og balanseskiver varierer avhengig av <br>type kran, og beregninger m\u00e5 utf\u00f8res basert p\u00e5 de spesifikke omstendighetene:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>For heising og bomheising\/lufsing av st\u00e5ltau som brukes i generelle kraner og taljer, er b\u00f8yetretthet ofte den prim\u00e6re formen for st\u00e5ltauskade n\u00e5r det brukes ettlagsvikling. Ovennevnte koeffisientene anbefales spesielt for \u00e5 begrense radialtrykket p\u00e5 st\u00e5ltauet i tauets inn- og utgangsomr\u00e5de.<\/li>\n\n\n\n<li>For mobilkraner anbefales koeffisientene ovenfor spesielt n\u00e5r det brukes ettlagsvikling for \u00e5 begrense radialtrykket p\u00e5 enheten og forbedre motstanden mot b\u00f8yetretthet.<\/li>\n\n\n\n<li>For mobilkraner anbefales koeffisientene ovenfor spesielt n\u00e5r flerlagsvikling brukes for \u00e5 begrense radialtrykket p\u00e5 st\u00e5ltauet i overlappende omr\u00e5der og den resulterende st\u00e5ltautorsjonseffekten.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Gjeldende kraner<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Traverskraner<\/li>\n\n\n\n<li>Taljer - st\u00e5ltau<\/li>\n\n\n\n<li>Portal- eller semiportalkraner<\/li>\n\n\n\n<li>Portal- eller semiportalbrokraner<\/li>\n\n\n\n<li>Mobilkraner<\/li>\n\n\n\n<li>Cantileverkraner (s\u00f8yle-, jib-, vegg- eller g\u00e5ende)<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"Denne kalkulatoren for minimumsdiameter p\u00e5 kranskiver er strengt i samsvar med ISO 16625:2013, og beregner raskt minimum skivestigningsdiameter etter nominell diameter p\u00e5 st\u00e5ltauet og mekanismens arbeidsklasse. Underdimensjonerte skiver risikerer at tauet l\u00f8sner og sikkerhetstrusler, mens overdimensjonerte skiver begrenser l\u00f8fteh\u00f8yde og lastekapasitet. Den verifiserer samsvar, optimaliserer skivevalg, forutsier st\u00e5ltauets levetid, reduserer vedlikeholdskostnader, unng\u00e5r nedetid og forbedrer driftssikkerhet og effektivitet.","protected":false},"author":8,"featured_media":17090,"parent":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"single-onlinetools.php","format":"standard","meta":{"_acf_changed":false,"rank_math_lock_modified_date":false,"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[1059],"tags":[],"class_list":["post-17088","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-online-tools"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.dgcrane.com\/no\/wp-json\/wp\/v2\/posts\/17088"}],"collection":[{"href":"https:\/\/www.dgcrane.com\/no\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dgcrane.com\/no\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/no\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/no\/wp-json\/wp\/v2\/comments?post=17088"}],"version-history":[{"count":6,"href":"https:\/\/www.dgcrane.com\/no\/wp-json\/wp\/v2\/posts\/17088\/revisions"}],"predecessor-version":[{"id":17101,"href":"https:\/\/www.dgcrane.com\/no\/wp-json\/wp\/v2\/posts\/17088\/revisions\/17101"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dgcrane.com\/no\/wp-json\/wp\/v2\/media\/17090"}],"wp:attachment":[{"href":"https:\/\/www.dgcrane.com\/no\/wp-json\/wp\/v2\/media?parent=17088"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dgcrane.com\/no\/wp-json\/wp\/v2\/categories?post=17088"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dgcrane.com\/no\/wp-json\/wp\/v2\/tags?post=17088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}