{"id":11917,"date":"2026-07-07T07:11:30","date_gmt":"2026-07-07T07:11:30","guid":{"rendered":"https:\/\/www.kscranegroup.com\/?post_type=posts&#038;p=11917"},"modified":"2026-07-07T07:11:35","modified_gmt":"2026-07-07T07:11:35","slug":"overhead-crane-wire-rope-selection","status":"publish","type":"posts","link":"https:\/\/www.kscranegroup.com\/sv\/posts\/overhead-crane-wire-rope-selection\/","title":{"rendered":"Val av vajer f\u00f6r traverskranar: Den kompletta guiden till s\u00e4ker trum- och skivdesign"},"content":{"rendered":"<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><p>Inneh\u00e5llsf\u00f6rteckning<\/p><nav><ul><li><a href=\"#1-scope\">1. Omfattning<\/a><\/li><li><a href=\"#2-overhead-crane-wire-rope-minimum-safety-factor-zp\">2. Minsta s\u00e4kerhetsfaktor Zp f\u00f6r traverskranvajer<\/a><\/li><li><a href=\"#3-overhead-crane-wire-rope-selection\">3. Val av vajer f\u00f6r traverskranar<\/a><ul><li><a href=\"#3-1-minimum-breaking-force\">3.1 Minsta brytkraft<\/a><\/li><li><a href=\"#3-2-maximum-fleet-angle\">3.2 Maximal flottvinkel<\/a><\/li><li><a href=\"#3-3-maximum-service-temperature-for-wire-rope\">3.3 Maximal driftstemperatur f\u00f6r st\u00e5llina<\/a><\/li><\/ul><\/li><li><a href=\"#4-overhead-crane-drum-and-sheave-selection\">4. Val av krantrumma och skiva<\/a><ul><li><a href=\"#4-1-drum-type-and-winding-direction\">4.1 Trumtyp och lindningsriktning<\/a><\/li><li><a href=\"#4-2-groove-radius-and-sheave-material\">4.2 Sp\u00e5rradie och skivmaterial<\/a><\/li><li><a href=\"#4-3-minimum-drum-and-sheave-diameter\">4.3 Minsta trum- och skivdiameter<\/a><\/li><\/ul><\/li><li><a href=\"#5-special-operating-conditions\">5. S\u00e4rskilda driftsf\u00f6rh\u00e5llanden<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<p>St\u00e5llina, <a href=\"https:\/\/www.kscranegroup.com\/sv\/crane-parts\/wire-drum.html\/\">trummor<\/a>, och trissor \u00e4r k\u00e4rnkomponenterna i alla lyftmekanismer f\u00f6r traverskranar eller lyftanordningar. Vilken l\u00e4gsta s\u00e4kerhetsfaktor b\u00f6r man anv\u00e4nda n\u00e4r man specificerar dessa komponenter? Hur ber\u00e4knar man den erforderliga minsta brytkraften? Vilken diameter b\u00f6r trumman och trissen ha?<\/p>\n\n\n\n<p>Val av vajer f\u00f6r traverskranar f\u00f6rklarat med GB\/T 34529-2017 (ISO 16625). L\u00e4r dig hur du ber\u00e4knar minsta brottkraft, v\u00e4ljer r\u00e4tt vajers\u00e4kerhetsfaktor, best\u00e4mmer trum- och skivdiametrar, styr vagnsvinkel, v\u00e4ljer sp\u00e5rdimensioner och optimerar vajerprestanda f\u00f6r traverskranar och lyftanordningar.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1928\" height=\"816\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/1Figure-1-Overhead-crane-european-style-lifting-mechanism.png\" alt=\"\" class=\"wp-image-11907\" srcset=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/1Figure-1-Overhead-crane-european-style-lifting-mechanism.png 1928w, https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/1Figure-1-Overhead-crane-european-style-lifting-mechanism-1536x650.png 1536w\" sizes=\"(max-width: 1928px) 100vw, 1928px\" \/><figcaption class=\"wp-element-caption\"><em>Figur 1 Lyftmekanism i europeisk stil<\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"1-scope\">1. Omfattning<\/h2>\n\n\n\n<p>Denna standard g\u00e4ller f\u00f6ljande kran- och lyfttyper (de flesta definieras i ISO 4306-1, motsvarande GB\/T 6974.1-2008):<\/p>\n\n\n\n<ul>\n<li>Brokranar (traverskranar)<\/li>\n\n\n\n<li>Vajerhissar<\/li>\n\n\n\n<li>Portal- eller halvportalkranar<\/li>\n\n\n\n<li>Portal- eller halvportalkranar<\/li>\n\n\n\n<li>Kabelkranar och portalkabelkranar (endast lyftmekanism och l\u00f6pmekanism)<\/li>\n\n\n\n<li>Mobilkranar<\/li>\n\n\n\n<li>Tornkranar<\/li>\n\n\n\n<li>J\u00e4rnv\u00e4gskranar<\/li>\n\n\n\n<li>Flytande kranar<\/li>\n\n\n\n<li>D\u00e4ckskranar<\/li>\n\n\n\n<li>Borrkranar och kabelborrkranar<\/li>\n\n\n\n<li>Stelt stagade borrkranar<\/li>\n\n\n\n<li>Sv\u00e4ngkranar (pelar-, bom-, v\u00e4gg- eller cykelkranar)<\/li>\n\n\n\n<li>Allm\u00e4nna offshore-kranar<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"2-overhead-crane-wire-rope-minimum-safety-factor-zp\">2. Minsta s\u00e4kerhetsfaktor Zp f\u00f6r traverskranvajer<\/h2>\n\n\n\n<p>Den l\u00e4gsta s\u00e4kerhetsfaktorn f\u00f6r en traverskrans st\u00e5llina beror p\u00e5 mekanismens arbetsuppgift, linans till\u00e4mpning, linans rullningsanordning och lintyp.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1832\" height=\"859\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/2Table-1-Minimum-safety-factors-for-overhead-cranes-and-hoists-Source-GBT-34529-2017.png\" alt=\"\" class=\"wp-image-11908\" srcset=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/2Table-1-Minimum-safety-factors-for-overhead-cranes-and-hoists-Source-GBT-34529-2017.png 1832w, https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/2Table-1-Minimum-safety-factors-for-overhead-cranes-and-hoists-Source-GBT-34529-2017-1536x720.png 1536w\" sizes=\"(max-width: 1832px) 100vw, 1832px\" \/><figcaption class=\"wp-element-caption\"><em>Tabell 1 Minimis\u00e4kerhetsfaktorer f\u00f6r kranar (exklusive mobilkranar) och lyftanordningar (K\u00e4lla: GB\/T 34529-2017)<\/em><\/figcaption><\/figure>\n\n\n\n<p>Punkterna 1\u20135 kommer fr\u00e5n GB\/T 3811-2008 tabell 44; punkterna 6\u20139 kommer fr\u00e5n GB\/T 34529-2017 och GB\/T 8706-2017.<\/p>\n\n\n\n<p><strong>Viktiga kompletterande anm\u00e4rkningar:<\/strong><\/p>\n\n\n\n<ol>\n<li>F\u00f6r st\u00e5llinor som hanterar farliga laster, v\u00e4lj s\u00e4kerhetsfaktorn fr\u00e5n tabellen p\u00e5 <strong>en arbetsniv\u00e5 h\u00f6gre<\/strong> \u00e4n designklassificeringen.<\/li>\n\n\n\n<li>F\u00f6r metallurgiska kranar och hamncontainerkranar med mekanismkrav M7 eller M8, a <strong>n\u00e5got l\u00e4gre arbetsklassificering<\/strong> f\u00e5r anv\u00e4ndas f\u00f6r val av st\u00e5llina, f\u00f6rutsatt att linans f\u00f6rslitning kan \u00f6vervakas under drift f\u00f6r att s\u00e4kerst\u00e4lla s\u00e4ker anv\u00e4ndning och snabb utbyte.<\/li>\n\n\n\n<li><strong>Metallurgiska kranar<\/strong>: den l\u00e4gsta s\u00e4kerhetsfaktorn f\u00e5r inte vara mindre \u00e4n <strong>7.1<\/strong>.<\/li>\n\n\n\n<li><strong>Hamncontainerkranar<\/strong>Minsta s\u00e4kerhetsfaktor f\u00f6r huvudlyftlinor och draglinor f\u00f6r l\u00f6pvagnar f\u00e5r inte vara mindre \u00e4n <strong>6<\/strong>.<\/li>\n\n\n\n<li>St\u00e5llinor f\u00f6r teleskopbommar ska ha en s\u00e4kerhetsfaktor p\u00e5 minst 4.<\/li>\n\n\n\n<li><strong>Standardvajer<\/strong> \u2014 En samlingsterm f\u00f6r \u201denkelt\u00e4ckt rep\u201d och \u201dparallellt slutet rep\u201d, \u00e4ven kallat \u201drotationsfri rep\u201d.<\/li>\n\n\n\n<li><strong>Rotationsbest\u00e4ndig st\u00e5llina<\/strong> \u2014 Ett flertr\u00e5det rep som producerar minskat vridmoment eller rotation vid uppb\u00e4rande av en last. Rotationsbest\u00e4ndiga rep best\u00e5r vanligtvis av minst tv\u00e5 lager av str\u00e4ngar som \u00e4r lagda spiralformat runt en st\u00e5lk\u00e4rna eller fiberk\u00e4rna, med de yttre str\u00e4ngarna lagda i motsatt riktning mot de intilliggande inre str\u00e4ngarna.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1337\" height=\"400\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/3Figure-2-Rotation-resistant-overhead-crane-wire-rope-selection-example.png\" alt=\"\" class=\"wp-image-11943\"\/><figcaption class=\"wp-element-caption\"><em>Figur 2 Exempel p\u00e5 rotationss\u00e4ker st\u00e5lvajer (K\u00e4lla: GB\/T 8706-2017)<\/em><\/figcaption><\/figure>\n\n\n\n<ol>\n<li><strong>Enkelt lager rep<\/strong> \u2014 Ett flertr\u00e5det rep best\u00e5ende av ett lager av tr\u00e5dar lagda spiralformat runt en k\u00e4rna.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1337\" height=\"388\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/4Figure-3-Single-layer-multi-strand-rope-example.png\" alt=\"\" class=\"wp-image-11910\"\/><figcaption class=\"wp-element-caption\"><em>Figur 3 Exempel p\u00e5 enskiktsrep med flera str\u00e4ngar (K\u00e4lla: GB\/T 8706-2017)<\/em><\/figcaption><\/figure>\n\n\n\n<ol>\n<li><strong>Parallellt st\u00e4ngt rep<\/strong> \u2014 Ett flertr\u00e5det rep best\u00e5ende av tv\u00e5 eller flera lager av tr\u00e5dar lagda i en enda operation runt en tr\u00e5dk\u00e4rna eller fiberk\u00e4rna.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1337\" height=\"350\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/5Figure-4-Parallel-closed-rope-example.png\" alt=\"\" class=\"wp-image-11911\"\/><figcaption class=\"wp-element-caption\"><em>Figur 4 Exempel p\u00e5 parallellt st\u00e4ngt rep (K\u00e4lla: GB\/T 8706-2017)<\/em><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1766\" height=\"891\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/6Table-2-Minimum-safety-factors-for-mobile-overhead-cranes.png\" alt=\"\" class=\"wp-image-11912\" srcset=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/6Table-2-Minimum-safety-factors-for-mobile-overhead-cranes.png 1766w, https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/6Table-2-Minimum-safety-factors-for-mobile-overhead-cranes-1536x775.png 1536w\" sizes=\"(max-width: 1766px) 100vw, 1766px\" \/><figcaption class=\"wp-element-caption\"><em>Tabell 2 Minimis\u00e4kerhetsfaktorer f\u00f6r mobilkranar (K\u00e4lla: GB\/T 34529-2017)<\/em><\/figcaption><\/figure>\n\n\n\n<p>Mobilkranar omfattar lastbilskranar, hjulkranar, bandkranar, terr\u00e4ngkranar och lastbilsmonterade kranar (GB\/T 20776-2023).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1393\" height=\"1129\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/7able-3-Minimum-safety-factors-for-static-ropes-and-erection-ropes.png\" alt=\"\" class=\"wp-image-11913\"\/><figcaption class=\"wp-element-caption\"><em>Tabell 3 Minimis\u00e4kerhetsfaktorer f\u00f6r statiska rep och resningslinor (K\u00e4lla: GB\/T 34529-2017)<\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"3-overhead-crane-wire-rope-selection\">3. Val av vajer f\u00f6r traverskranar<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-1-minimum-breaking-force\">3.1 Minsta brytkraft<\/h3>\n\n\n\n<p>Fmin \u2265 S \u00d7 Zp<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Symbol<\/th><th>Menande<\/th><\/tr><\/thead><tbody><tr><td>Fmin<\/td><td>Minsta brytkraft<\/td><\/tr><tr><td>S<\/td><td>Maximal repsp\u00e4nning<\/td><\/tr><tr><td>Zp<\/td><td>Minsta s\u00e4kerhetsfaktor (se tabell 1, 2, 3)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>S\u00e4rskild hantering f\u00f6r gripskopkranar:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Skick<\/th><th>St\u00e4ngningsrep S_cl<\/th><th>H\u00e5llrepet S_h\u00e5ll<\/th><\/tr><\/thead><tbody><tr><td>Ladda automatiskt utj\u00e4mnad<\/td><td>Lastad gripmassa \u00d7 66% \u00f7 st\u00e4ngningslinan faller<\/td><td>Lastad gripmassa \u00d7 66% \u00f7 griplinans fall<\/td><\/tr><tr><td>Lasten utj\u00e4mnades inte automatiskt<\/td><td>Lastad gripmassa \u00f7 st\u00e4ngningslinan faller<\/td><td>Lastad gripmassa \u00d7 66% \u00f7 griplinans fall<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-2-maximum-fleet-angle\">3.2 Maximal flottvinkel<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Skick<\/th><th>Flottans vinkelgr\u00e4ns<\/th><th>H\u00e4nvisning<\/th><\/tr><\/thead><tbody><tr><td>Rotationsbest\u00e4ndigt rep<\/td><td>\u2264 <strong>2\u00b0<\/strong><\/td><td>GB\/T 34529-2017, klausul B.4<\/td><\/tr><tr><td>Standardvajer<\/td><td>\u2264 <strong>4\u00b0<\/strong><\/td><td>GB\/T 34529-2017, klausul B.4<\/td><\/tr><tr><td>Rep som g\u00e5r in i\/ut ur ett skivsp\u00e5r<\/td><td>< <strong>5\u00b0<\/strong><\/td><td>GB\/T 27546-2011, klausul 5.7.2; GB\/T 3811-2008, klausul 6.3.3.3.1<\/td><\/tr><tr><td>Rep som g\u00e5r in i\/ut ur en r\u00e4fflad trumma<\/td><td>\u2264 <strong>3,5\u00b0<\/strong><\/td><td>JB\/T 9006-2013, klausul 4.7.2; GB\/T 3811-2008, klausul 6.3.3.3.2<\/td><\/tr><tr><td>Enkel trumma, flerskiktad, ingen spolningsenhet<\/td><td>\u2264 <strong>1,7\u00b0<\/strong><\/td><td>JB\/T 9006-2013, klausul 4.7.3; GB\/T 3811-2008, klausul 6.3.3.3.3<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">F\u00f6r flerskiktsrullning av trummor rekommenderas st\u00e5llinor med st\u00e5lk\u00e4rnor.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1512\" height=\"1040\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/8Figure-5-Fleet-angle-and-helix-angle.png\" alt=\"\" class=\"wp-image-11914\"\/><figcaption class=\"wp-element-caption\"><em>Figur 5 Fleetvinkel och helixvinkel<\/em><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Symbol<\/th><th>Menande<\/th><th>Begr\u00e4nsa<\/th><\/tr><\/thead><tbody><tr><td>\u03b1<\/td><td>Trumspiralvinkel<\/td><td>\u2014<\/td><\/tr><tr><td>\u03b2<em>v\u00e4nster + \u03b1, \u03b2<\/em>h\u00f6ger \u2212 \u03b1<\/td><td>Fleets vinkel i f\u00f6rh\u00e5llande till trummans sp\u00e5rs mittlinje<\/td><td>\u2264 3,5\u00b0 (typiskt utformad f\u00f6r max. 3,5\u00b0)<\/td><\/tr><tr><td>\u03b2<em>v\u00e4nster, \u03b2<\/em>r\u00e4tt<\/td><td>Fleetvinkel in-\/utg\u00e5ende skiva<\/td><td>&lt; 5\u00b0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>\u00c5tg\u00e4rder f\u00f6r att minska flottans vinkel:<\/strong><\/p>\n\n\n\n<ul>\n<li>\u00d6ka trummans diameter f\u00f6r att minska lindningsomr\u00e5det<\/li>\n\n\n\n<li>\u00d6ka avst\u00e5ndet mellan skiva och trumma<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-3-maximum-service-temperature-for-wire-rope\">3.3 Maximal driftstemperatur f\u00f6r st\u00e5llina<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>K\u00e4rntyp<\/th><th>Maximal temperatur<\/th><th>Anteckningar<\/th><\/tr><\/thead><tbody><tr><td>Fiberk\u00e4rna (FC)<\/td><td><strong>100\u00b0C<\/strong><\/td><td>\u2014<\/td><\/tr><tr><td>St\u00e5lk\u00e4rna (IWRC) \/ enkeltr\u00e5digt rep \/ l\u00e5st lina<\/td><td><strong>200\u00b0C<\/strong><\/td><td>Fr\u00e5n 100\u00b0C till 200\u00b0C kan en 10%-styrkef\u00f6rlust antas; specialsm\u00f6rjmedel kr\u00e4vs \u00f6ver 100\u00b0C.<\/td><\/tr><tr><td>Omgivningstemperatur <strong>\u221240\u00b0C<\/strong><\/td><td>Styrka op\u00e5verkad<\/td><td>Ingen minskning av arbetsbelastningen beh\u00f6vs, men repets prestanda kan bero p\u00e5 sm\u00f6rjmedlets effektivitet vid l\u00e5ga temperaturer<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Om driftsmilj\u00f6n f\u00f6rhindrar sm\u00f6rjning av st\u00e5llinan rekommenderas samr\u00e5d mellan leverant\u00f6r och k\u00f6pare, inklusive krav p\u00e5 inspektionsfrekvens.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"4-overhead-crane-drum-and-sheave-selection\">4. Val av krantrumma och skiva<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-1-drum-type-and-winding-direction\">4.1 Trumtyp och lindningsriktning<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>J\u00e4mf\u00f6relse<\/th><th>Vanlig trumma<\/th><th>Sp\u00e5rad trumma<\/th><\/tr><\/thead><tbody><tr><td>Rekommendation<\/td><td>Godtagbar<\/td><td><strong>F\u00f6redragen<\/strong> (enkelskiktslindning)<\/td><\/tr><tr><td>Flerskiktslindning<\/td><td>Fl\u00e4nsh\u00f6jd \u00f6ver yttersta repet \u2265 0,5d<\/td><td>Samma som v\u00e4nster<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Regler f\u00f6r lindningsriktning:<\/strong><\/p>\n\n\n\n<ul>\n<li>Vanlig trumma \u2192 Lindningsriktningen beror p\u00e5 repets l\u00e4ggningsriktning; best\u00e4m repets f\u00e4stpunkt enligt tabell 4.<\/li>\n\n\n\n<li>Sp\u00e5rad trumma \u2192 Valfri repl\u00e4ggningsriktning kan anv\u00e4ndas, men <strong>samma uppl\u00e4ggning som f\u00f6r en vanlig trumma \u00e4r att f\u00f6redra<\/strong>: v\u00e4nster spiralformade sp\u00e5r matchar h\u00f6gerlagd lina, h\u00f6ger spiralformade sp\u00e5r matchar v\u00e4nsterlagd lina.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1383\" height=\"1137\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/9Table-4-Correct-method-for-determining-the-rope-fixing-point-on-a-drum.png\" alt=\"\" class=\"wp-image-11915\"\/><figcaption class=\"wp-element-caption\"><em>Tabell 4 Korrekt metod f\u00f6r att best\u00e4mma repets f\u00e4stpunkt p\u00e5 en trumma (K\u00e4lla: GB\/T 34529-2017)<\/em><\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-2-groove-radius-and-sheave-material\">4.2 Sp\u00e5rradie och skivmaterial<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Parameter<\/th><th>Rekommenderat v\u00e4rde<\/th><\/tr><\/thead><tbody><tr><td>Sp\u00e5rradie<\/td><td>0,525d\u20130,550d, <strong>optimal 0,5375d<\/strong><\/td><\/tr><tr><td>Skiva inkluderad vinkel<\/td><td>45\u00b0\u201360\u00b0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Riktlinjer f\u00f6r val av skivmaterial:<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Lindningstyp<\/th><th>Rekommenderat material<\/th><th>Resonera<\/th><\/tr><\/thead><tbody><tr><td>Flerskiktad<\/td><td>Polymerskivor eller polymerfodrade sp\u00e5r \u00e4r acceptabla<\/td><td>De allvarligaste repskadorna uppst\u00e5r vid korsningszoner p\u00e5 trumman<\/td><\/tr><tr><td>Enkelskikt<\/td><td>Polymerskivor <strong>rekommenderas inte<\/strong><\/td><td>Skador orsakas fr\u00e4mst av utmattning; inre utmattning av repet \u00e4r sv\u00e5rare att uppt\u00e4cka med polymertrissor<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>F\u00f6r frekvent service: anv\u00e4nd <strong>st\u00e5lskivor<\/strong> f\u00f6r att \u00f6ka sannolikheten f\u00f6r yttre slitage \u2014 detta slitage underl\u00e4ttar repinspektion. Om polymertrissor anv\u00e4nds rekommenderas att inkludera minst <strong>en st\u00e5lskiva<\/strong> i rullanordningen, vanligtvis den som \u00e4r n\u00e4rmast trumman.<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-3-minimum-drum-and-sheave-diameter\">4.3 Minsta trum- och skivdiameter<\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1105\" height=\"1423\" src=\"https:\/\/www.kscranegroup.com\/wp-content\/uploads\/2026\/07\/10Table-5-Overhead-Crane-Drum-and-sheave-selection-coefficients-and-minimum-diameter-calculation-.png\" alt=\"\" class=\"wp-image-11916\"\/><figcaption class=\"wp-element-caption\"><em>Tabell 5 Valkoefficienter f\u00f6r trumma och skiva och ber\u00e4kning av minsta diameter (K\u00e4lla: GB\/T 34529-2017)<\/em><\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"5-special-operating-conditions\">5. S\u00e4rskilda driftsf\u00f6rh\u00e5llanden<\/h2>\n\n\n\n<p>F\u00f6r hantering av sm\u00e4lt metall, extremt kr\u00e4vande och\/eller korrosiva milj\u00f6er och liknande speciella f\u00f6rh\u00e5llanden:<\/p>\n\n\n\n<ol>\n<li>Mekanismens arbetsbelastning f\u00e5r inte vara l\u00e4gre \u00e4n M5<\/li>\n\n\n\n<li>Zp-v\u00e4rdet ska \u00f6kas med 25%, upp till maximalt 9,0<\/li>\n<\/ol>\n\n\n\n<p>Originaldokumentet t\u00e4cker \u00e4ven anv\u00e4ndningen av svivlar och svivelkopplingar, orsaker till f\u00f6rs\u00e4mring av vajer, vajerf\u00f6rl\u00e4ngning och val, samt val av vajeravslutning. Se originalstandarden f\u00f6r vidare studier.<\/p>\n\n\n\n<p><strong>Referensstandarder<strong>(<a href=\"https:\/\/openstd.samr.gov.cn\/bzgk\/std\/std_list?p.p1=0&amp;p.p90=circulation_date&amp;p.p91=desc&amp;p.p2=%E8%B5%B7%E9%87%8D%E6%9C%BA\" target=\"_blank\" rel=\"noopener\">Fr\u00e5ga om kinesiska kranstandarder<\/a>)<\/strong>:<\/strong><\/p>\n\n\n\n<ul>\n<li>GB\/T 34529-2017 Kranar och lyftanordningar \u2013 Val av st\u00e5llinor, trummor och trissor (IDT ISO 16625:2013)<\/li>\n\n\n\n<li>GB\/T 20118-2017 St\u00e5lvajer f\u00f6r allm\u00e4nna \u00e4ndam\u00e5l (NEQ ISO 2408:2017)<\/li>\n\n\n\n<li>GB\/T 20863.1-2021 Kranar \u2014 Klassificering \u2014 Del 1: Allm\u00e4nt (IDT ISO 4301-1:2016)<\/li>\n\n\n\n<li>GB\/T 6974.1-2008 Kranar \u2014 Ordf\u00f6rr\u00e5d \u2014 Del 1: Allm\u00e4nt (IDT ISO 4306-1:2007)<\/li>\n\n\n\n<li>GB\/T 5972-2023 Kranar \u2014 St\u00e5llinor \u2014 Sk\u00f6tsel och underh\u00e5ll, inspektion och kassering (IDT ISO 4309:2017)<\/li>\n\n\n\n<li>GB\/T 8706-2017 St\u00e5lvajer \u2013 Ordf\u00f6rr\u00e5d, beteckning och klassificering (MOD ISO 17893:2004)<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"Wire rope, drums, and sheaves are the core components of any overhead crane or hoist lifting mechanism. When specifying these components, what minimum safety factor should you use? How do you calculat","protected":false},"featured_media":11527,"parent":0,"menu_order":0,"template":"single-SEO-Table.php","posts_category":[189],"posts_tag":[826,801,825,822,823,121,829,828,818,827,824],"acf":[],"_links":{"self":[{"href":"https:\/\/www.kscranegroup.com\/sv\/wp-json\/wp\/v2\/xmxposts\/11917"}],"collection":[{"href":"https:\/\/www.kscranegroup.com\/sv\/wp-json\/wp\/v2\/xmxposts"}],"about":[{"href":"https:\/\/www.kscranegroup.com\/sv\/wp-json\/wp\/v2\/types\/posts"}],"version-history":[{"count":3,"href":"https:\/\/www.kscranegroup.com\/sv\/wp-json\/wp\/v2\/xmxposts\/11917\/revisions"}],"predecessor-version":[{"id":11944,"href":"https:\/\/www.kscranegroup.com\/sv\/wp-json\/wp\/v2\/xmxposts\/11917\/revisions\/11944"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kscranegroup.com\/sv\/wp-json\/wp\/v2\/media\/11527"}],"wp:attachment":[{"href":"https:\/\/www.kscranegroup.com\/sv\/wp-json\/wp\/v2\/media?parent=11917"}],"wp:term":[{"taxonomy":"posts_category","embeddable":true,"href":"https:\/\/www.kscranegroup.com\/sv\/wp-json\/wp\/v2\/posts_category?post=11917"},{"taxonomy":"posts_tag","embeddable":true,"href":"https:\/\/www.kscranegroup.com\/sv\/wp-json\/wp\/v2\/posts_tag?post=11917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}