{"id":18979,"date":"2026-07-07T02:32:49","date_gmt":"2026-07-07T02:32:49","guid":{"rendered":"https:\/\/tuohaihardware.com\/?p=18979"},"modified":"2026-09-26T08:24:23","modified_gmt":"2026-09-26T08:24:23","slug":"rozdil-mezi-tridami-retezu-a-jak-je-identifikovat","status":"publish","type":"post","link":"https:\/\/tuohaihardware.com\/cs\/difference-between-chain-grades-and-how-to-identify-them\/","title":{"rendered":"Rozd\u00edl mezi stupni \u0159et\u011bzu a jak je identifikovat"},"content":{"rendered":"<p>P\u0159i n\u00e1kupu pr\u016fmyslov\u00fdch <a href=\"https:\/\/tuohaihardware.com\/cs\/ocelovy-retez\/\" target=\"_blank\" rel=\"noopener\">ocelov\u00e9 \u0159et\u011bzy<\/a>, \u010dasto se setk\u00e1te s ozna\u010den\u00edm jakosti, jako je G30, G40, G43, G70, G80 a G100. Tyto \u0159et\u011bzy mohou vypadat t\u00e9m\u011b\u0159 stejn\u011b tvarov\u011b, ale velmi se li\u0161\u00ed materi\u00e1lem, v\u00fdrobn\u00edm procesem, platn\u00fdmi normami a pracovn\u00edm prost\u0159ed\u00edm. Pro mnoho kupuj\u00edc\u00edch nen\u00ed skute\u010dn\u00fdm probl\u00e9mem zapamatovat si tyto jakosti, ale rozhodnout se, kter\u00e1 z nich je pro jejich projekt vhodn\u011bj\u0161\u00ed a jak ov\u011b\u0159it, zda \u0159et\u011bzy dodavatele spl\u0148uj\u00ed po\u017eadavky.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-18983\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/banner.jpg\" alt=\"\u0159et\u011bzov\u00e1 t\u0159\u00edda\" width=\"1200\" height=\"550\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/banner.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/banner-768x352.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/banner-18x8.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<h2><strong>Jak\u00fd je rozd\u00edl mezi \u0159et\u011bzov\u00fdmi jakostmi?<\/strong><\/h2>\n<p>P\u0159i n\u00e1kupu \u0159et\u011bz\u016f mnoho lid\u00ed jako prvn\u00ed napadne pr\u016fm\u011br dr\u00e1tu, nap\u0159\u00edklad 8mm, 10mm nebo 12mm. Pr\u016fm\u011br dr\u00e1tu se v\u0161ak vztahuje pouze k velikosti suroviny pou\u017eit\u00e9 k v\u00fdrob\u011b \u0159et\u011bzu. Neur\u010duje... <a href=\"https:\/\/tuohaihardware.com\/cs\/jaky-je-limit-pracovniho-zatizeni-retezu\/\" target=\"_blank\" rel=\"noopener\">mezn\u00ed nosnost (WLL)<\/a>.<\/p>\n<p>Skute\u010dn\u00e1 nosnost je ovlivn\u011bna nejen pr\u016fm\u011brem, ale tak\u00e9 jakost\u00ed \u0159et\u011bzu. Materi\u00e1ly, v\u00fdrobn\u00ed procesy a pou\u017eiteln\u00e9 sc\u00e9n\u00e1\u0159e pro r\u016fzn\u00e9 jakosti sva\u0159ovac\u00edch \u0159et\u011bz\u016f se v\u00fdrazn\u011b li\u0161\u00ed.<\/p>\n<p>Proto p\u0159i n\u00e1kupu \u0159et\u011bz\u016f nesta\u010d\u00ed jednodu\u0161e \u0159\u00edct \u201cPot\u0159ebuji \u0159et\u011bz 10 mm\u201d. M\u011bli byste jasn\u011b uv\u00e9st sv\u00e9 po\u017eadavky, nap\u0159\u00edklad: \u201cPot\u0159ebuji transportn\u00ed \u0159et\u011bz G70 10 mm.\u201d T\u00edmto zp\u016fsobem m\u016f\u017ee v\u00fdrobce rychle a p\u0159esn\u011b pochopit, co pot\u0159ebujete, a zlep\u0161it tak efektivitu komunikace.<\/p>\n<h2><strong>\u0158et\u011bz G30: Vinut\u00fd \u0159et\u011bz s odolnou c\u00edvkou pro lehk\u00e9 aplikace<\/strong><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-18984\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G30-proof-coil-chains.jpg\" alt=\"Vinut\u00e9 \u0159et\u011bzy odoln\u00e9 proti G30\" width=\"1200\" height=\"550\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G30-proof-coil-chains.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G30-proof-coil-chains-768x352.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G30-proof-coil-chains-18x8.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p><a href=\"https:\/\/tuohaihardware.com\/cs\/proof-civkovy-retez\/\" target=\"_blank\" rel=\"noopener\">\u0159et\u011bz G30<\/a>, tak\u00e9 zn\u00e1m\u00fd jako Proof Coil Chain, je obvykle vyroben z n\u00edzkouhl\u00edkov\u00e9 oceli a m\u00e1 r\u016fzn\u00e9 metody povrchov\u00e9 \u00fapravy, jako je galvanick\u00e9 zinkov\u00e1n\u00ed, \u017e\u00e1rov\u00e9 zinkov\u00e1n\u00ed nebo pr\u00e1\u0161kov\u00e9 lakov\u00e1n\u00ed atd.<\/p>\n<p>\u0158et\u011bz G30 m\u00e1 n\u00edzkou cenu a snadno se sva\u0159uje a zpracov\u00e1v\u00e1. Je to jeden z nej\u010dast\u011bji pou\u017e\u00edvan\u00fdch b\u011b\u017en\u00fdch sva\u0159ovan\u00fdch \u0159et\u011bz\u016f. Pokud se jedn\u00e1 o z\u00e1kladn\u00ed zaji\u0161t\u011bn\u00ed n\u00e1kladu, zem\u011bd\u011blstv\u00ed, oplocen\u00ed nebo lehk\u00e9 ta\u017een\u00ed, je G30 \u010dasto praktickou volbou.<\/p>\n<p>Hlavn\u00edmi v\u00fdhodami \u0159et\u011bzu G30 jsou jeho n\u00edzk\u00e1 cena a dobr\u00e1 zpracovatelnost. Je \u0161iroce pou\u017e\u00edv\u00e1n v lehk\u00fdch aplikac\u00edch, jako nap\u0159\u00edklad:<\/p>\n<ul>\n<li>Bari\u00e9rov\u00fd \u0159et\u011bz<\/li>\n<li>Krajinn\u00fd \u0159et\u011bzec<\/li>\n<li><a href=\"https:\/\/tuohaihardware.com\/cs\/ocelovy-retez\/bezpecnostni-retez\/\" target=\"_blank\" rel=\"noopener\">Bezpe\u010dnostn\u00ed \u0159et\u011bz<\/a><\/li>\n<li>Farm\u00e1\u0159sk\u00fd \u0159et\u011bzec<\/li>\n<li>Zv\u00ed\u0159ec\u00ed \u0159et\u011bz<\/li>\n<li>Lehk\u00e9 odtahov\u00e1n\u00ed<\/li>\n<li>Kotvi\u0161t\u011b pro mal\u00e9 lod\u011b<\/li>\n<\/ul>\n<p>Je v\u0161ak d\u016fle\u017eit\u00e9 poznamenat, \u017ee \u0159et\u011bz G30 nen\u00ed vhodn\u00fd pro zved\u00e1n\u00ed nad hlavou ani pro \u017e\u00e1dn\u00e9 aplikace s vysok\u00fdmi bezpe\u010dnostn\u00edmi po\u017eadavky.<\/p>\n<p>Pokud tedy v\u00e1\u0161 z\u00e1kazn\u00edk pot\u0159ebuje pouze b\u011b\u017en\u00fd u\u017eitkov\u00fd \u0159et\u011bz, je G30 cenov\u011b v\u00fdhodnou volbou. Pokud v\u0161ak aplikace zahrnuje zved\u00e1n\u00ed, zdvih\u00e1n\u00ed, pou\u017eit\u00ed je\u0159\u00e1bu nebo zav\u011b\u0161ov\u00e1n\u00ed, G30 by se nem\u011bl doporu\u010dovat.<\/p>\n<h2>\u0158et\u011bz G40: \u0158et\u011bz st\u0159edn\u00ed pevnosti<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-18985\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G40-chains-trailer-chains.jpg\" alt=\"\u0158et\u011bzy G40, \u0159et\u011bzy pro p\u0159\u00edv\u011bsy\" width=\"1200\" height=\"550\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G40-chains-trailer-chains.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G40-chains-trailer-chains-768x352.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G40-chains-trailer-chains-18x8.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p><a href=\"https:\/\/tuohaihardware.com\/cs\/rozdily-v-klicich-retezu-g4-vs-g43-a-typicke-aplikace\/\" target=\"_blank\" rel=\"noopener\">\u0158et\u011bz G40<\/a> je \u0159et\u011bz st\u0159edn\u00ed pevnosti pou\u017e\u00edvan\u00fd hlavn\u011b pro zaji\u0161t\u011bn\u00ed n\u00e1kladu, tah\u00e1n\u00ed, zem\u011bd\u011blskou techniku a lehk\u00e9 n\u00e1mo\u0159n\u00ed aplikace. Vyskytuje se p\u0159edev\u0161\u00edm na trz\u00edch, jako je Austr\u00e1lie, Nov\u00fd Z\u00e9land a n\u011bkter\u00e9 \u010d\u00e1sti Asie, ale v Evrop\u011b nebo Severn\u00ed Americe se b\u011b\u017en\u011b nepou\u017e\u00edv\u00e1.<\/p>\n<p>Na rozd\u00edl od G43, kter\u00fd je jasn\u011b definov\u00e1n v norm\u00e1ch NACM, G40 nem\u00e1 glob\u00e1ln\u011b jednotn\u00fd standard. Jeho specifikace se tedy mohou li\u0161it v z\u00e1vislosti na normov\u00e9m syst\u00e9mu nebo v\u00fdrobci. N\u011bkte\u0159\u00ed v\u00fdrobci vyr\u00e1b\u011bj\u00ed \u0159et\u011bzy G40 s pevnost\u00ed bl\u00edzkou G43, zat\u00edmco jin\u00ed mohou b\u00fdt jen o n\u011bco pevn\u011bj\u0161\u00ed ne\u017e G30.<\/p>\n<p>Pokud si tedy v\u00e1\u0161 z\u00e1kazn\u00edk nebo projekt vybere \u0159et\u011bz G40, nem\u011bli byste se spol\u00e9hat pouze na danou t\u0159\u00eddu. Mus\u00edte si ov\u011b\u0159it dal\u0161\u00ed podrobnosti, nap\u0159\u00edklad:<\/p>\n<ul>\n<li>Jak\u00fd standard se dodr\u017euje?<\/li>\n<li>Jak\u00e1 je po\u017eadovan\u00e1 nosnost (WLL)?<\/li>\n<li>Jak\u00e1 je skute\u010dn\u00e1 aplikace?<\/li>\n<li>Zahrnuje to zved\u00e1n\u00ed nebo pou\u017eit\u00ed nad hlavou?<\/li>\n<\/ul>\n<p>Teprve po ov\u011b\u0159en\u00ed t\u011bchto bod\u016f m\u016f\u017eete spr\u00e1vn\u011b posoudit, zda je \u0159et\u011bz vhodn\u00fd pro danou aplikaci.<\/p>\n<h2><strong>\u0158et\u011bz G43: Vysoce odoln\u00fd \u0159et\u011bz pro ta\u017een\u00ed a pr\u016fmyslov\u00e9 pou\u017eit\u00ed<\/strong><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-18986\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G43-High-Test-Chains.jpg\" alt=\"Vysoce odoln\u00e9 \u0159et\u011bzy G43\" width=\"1200\" height=\"550\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G43-High-Test-Chains.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G43-High-Test-Chains-768x352.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G43-High-Test-Chains-18x8.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p><a href=\"https:\/\/tuohaihardware.com\/cs\/ocelovy-retez\/retez-g43\/\" target=\"_blank\" rel=\"noopener\">\u0159et\u011bz G43<\/a> je tak\u00e9 zn\u00e1m\u00fd jako High Test Chain. Je vyroben z vysoce uhl\u00edkov\u00e9 oceli a je tepeln\u011b zpracov\u00e1n pro dosa\u017een\u00ed vy\u0161\u0161\u00ed pevnosti, co\u017e mu umo\u017e\u0148uje n\u00e9st v\u011bt\u0161\u00ed zat\u00ed\u017een\u00ed. Tato t\u0159\u00edda \u0159et\u011bzu se b\u011b\u017en\u011b pou\u017e\u00edv\u00e1 na severoamerick\u00e9m trhu a typicky se pou\u017e\u00edv\u00e1 v pr\u016fmyslu, zem\u011bd\u011blstv\u00ed a pro ta\u017en\u00e1 za\u0159\u00edzen\u00ed.<\/p>\n<p>P\u0159i n\u00e1kupu \u0159et\u011bz\u016f si mnoho z\u00e1kazn\u00edk\u016f v\u0161imne, \u017ee pou\u017eit\u00ed \u0159et\u011bz\u016f G43 a G70 je velmi podobn\u00e9, co\u017e \u010dasto vede k nejasnostem p\u0159i v\u00fdb\u011bru produktu.<\/p>\n<p>Jednoduch\u00fd zp\u016fsob, jak to pochopit, je:<\/p>\n<ul>\n<li>\u0158et\u011bz G43 je vhodn\u011bj\u0161\u00ed pro pr\u016fmyslov\u00e9 ta\u017een\u00ed, zem\u011bd\u011blsk\u00e9 stroje, lesnick\u00e9 za\u0159\u00edzen\u00ed a obecn\u00e9 pr\u016fmyslov\u00e9 zaji\u0161t\u011bn\u00ed n\u00e1kladu. Ve skute\u010dnosti se \u0159et\u011bz G43 b\u011b\u017en\u011b pou\u017e\u00edv\u00e1 ve v\u011bt\u0161in\u011b t\u011bchto aplikac\u00ed.<\/li>\n<li>G70 se pou\u017e\u00edv\u00e1 hlavn\u011b v dopravn\u00edm pr\u016fmyslu, zejm\u00e9na v Severn\u00ed Americe, kde p\u0159edpisy pro silni\u010dn\u00ed dopravu jasn\u011b definuj\u00ed po\u017eadavky na pevnost a zna\u010den\u00ed \u0159et\u011bz\u016f. G70 sn\u00e1ze spl\u0148uje tyto normy t\u00fdkaj\u00edc\u00ed se dopravy.<\/li>\n<\/ul>\n<p>Proto pro projekty, kter\u00e9 nezahrnuj\u00ed n\u00e1kladn\u00ed dopravu, \u0159et\u011bz G43 pln\u011b spl\u0148uje po\u017eadavky b\u011b\u017en\u00e9ho pr\u016fmyslov\u00e9ho nebo zem\u011bd\u011blsk\u00e9ho pou\u017eit\u00ed. Nen\u00ed t\u0159eba vynakl\u00e1dat zbyte\u010dn\u00e9 n\u00e1klady na po\u0159\u00edzen\u00ed jen proto, aby se dos\u00e1hlo vy\u0161\u0161\u00ed jakosti.<\/p>\n<h2><strong>\u0158et\u011bz G70: Ide\u00e1ln\u00ed dopravn\u00ed \u0159et\u011bz pro dopravn\u00ed pr\u016fmysl<\/strong><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-18987\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G70-Chains.jpg\" alt=\"\u0158et\u011bzy G70\" width=\"1200\" height=\"550\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G70-Chains.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G70-Chains-768x352.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G70-Chains-18x8.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p><a href=\"https:\/\/tuohaihardware.com\/cs\/prepravni-retezec-g70\/\" target=\"_blank\" rel=\"noopener\">\u0158et\u011bz t\u0159\u00eddy 70<\/a>, zn\u00e1m\u00fd tak\u00e9 jako dopravn\u00ed \u0159et\u011bz, se obvykle vyr\u00e1b\u00ed z tepeln\u011b zpracovan\u00e9 vysoce uhl\u00edkov\u00e9 oceli. Jeho povrch je \u010dasto opat\u0159en \u017elut\u00fdm chrom\u00e1tem nebo zinkov\u00e1n\u00edm. Celkov\u00e1 pevnost \u0159et\u011bzu je v\u00fdrazn\u011b vy\u0161\u0161\u00ed ne\u017e u \u0159et\u011bz\u016f t\u0159\u00eddy 43 a jin\u00fdch sva\u0159ovan\u00fdch \u0159et\u011bz\u016f ni\u017e\u0161\u00ed t\u0159\u00eddy, co\u017e ho \u010din\u00ed obzvl\u00e1\u0161t\u011b vhodn\u00fdm pro p\u0159epravu n\u00e1kladu, <a href=\"https:\/\/tuohaihardware.com\/cs\/ocelovy-retez\/privesny-retez\/\" target=\"_blank\" rel=\"noopener\">p\u0159\u00edv\u011bs<\/a>, a zaji\u0161t\u011bn\u00ed za\u0159\u00edzen\u00ed. V Severn\u00ed Americe se ocel t\u0159\u00eddy 70 stala jednou z nejb\u011b\u017en\u011bj\u0161\u00edch a nejpou\u017e\u00edvan\u011bj\u0161\u00edch mo\u017enost\u00ed v tomto odv\u011btv\u00ed v oblasti dopravy a ta\u017een\u00ed.<\/p>\n<p>Pokud je va\u0161\u00edm hlavn\u00edm trhem Severn\u00ed Amerika, zjist\u00edte, \u017ee popt\u00e1vka po \u0159et\u011bzech t\u0159\u00eddy 70 je mnohem vy\u0161\u0161\u00ed ne\u017e po jin\u00fdch t\u0159\u00edd\u00e1ch. A\u0165 u\u017e se jedn\u00e1 o transportn\u00ed \u0159et\u011bzy, \u0159et\u011bzy pro v\u00e1z\u00e1n\u00ed b\u0159emen nebo... <a href=\"https:\/\/tuohaihardware.com\/cs\/ocelovy-retez\/uvazat-retez\/\">Upev\u0148ovac\u00ed \u0159et\u011bz<\/a>, V\u011bt\u0161ina z\u00e1kazn\u00edk\u016f si nakonec vybere \u0159et\u011bz t\u0159\u00eddy 70. Z tohoto d\u016fvodu se mnoho lid\u00ed domn\u00edv\u00e1, \u017ee americk\u00e9 p\u0159edpisy pro silni\u010dn\u00ed dopravu vy\u017eaduj\u00ed pou\u017eit\u00ed \u0159et\u011bzu t\u0159\u00eddy 70, ale to nen\u00ed \u00fapln\u011b spr\u00e1vn\u00e9.<\/p>\n<p>Feder\u00e1ln\u00ed \u00fa\u0159ad pro bezpe\u010dnost motorov\u00fdch dopravc\u016f (FMCSA) v\u00fdslovn\u011b nevy\u017eaduje pou\u017eit\u00ed \u0159et\u011bz\u016f t\u0159\u00eddy 70 pro p\u0159epravu podle 49 CFR Part 393 (p\u0159edpisy pro zaji\u0161t\u011bn\u00ed n\u00e1kladu). P\u0159edpisy m\u00edsto toho vy\u017eaduj\u00ed, aby v\u0161echna za\u0159\u00edzen\u00ed pro zaji\u0161t\u011bn\u00ed n\u00e1kladu m\u011bla dostate\u010dnou nosnost (WLL) a aby celkov\u00e1 nosnost cel\u00e9ho upev\u0148ovac\u00edho syst\u00e9mu spl\u0148ovala po\u017eadavky na zaji\u0161t\u011bn\u00ed n\u00e1kladu.<\/p>\n<h3>Pro\u010d se \u0159et\u011bzy t\u0159\u00eddy 70 tak hojn\u011b pou\u017e\u00edvaj\u00ed v dopravn\u00edm pr\u016fmyslu?<\/h3>\n<p>D\u016fvod je jednoduch\u00fd: b\u011bhem mnoha let pou\u017e\u00edv\u00e1n\u00ed lid\u00e9 zjistili, \u017ee \u0159et\u011bzy t\u0159\u00eddy 70 nejen spl\u0148uj\u00ed p\u0159edpisy pro bezpe\u010dnost silni\u010dn\u00edho provozu stanoven\u00e9 FMCSA, ale jsou tak\u00e9 levn\u011bj\u0161\u00ed ne\u017e \u0159et\u011bzy G80 a nab\u00edzej\u00ed lep\u0161\u00ed pom\u011br ceny a v\u00fdkonu. D\u00edky tomu se staly nejpou\u017e\u00edvan\u011bj\u0161\u00ed t\u0159\u00eddou \u0159et\u011bz\u016f v severoamerick\u00e9m dopravn\u00edm pr\u016fmyslu.<\/p>\n<p>NACM nav\u00edc definuje t\u0159\u00eddu 70 jako standardn\u00ed dopravn\u00ed \u0159et\u011bzec, co\u017e d\u00e1le pos\u00edlilo jej\u00ed pozici a vliv v tomto odv\u011btv\u00ed.<\/p>\n<h2>\u0158et\u011bz G80: Nejpou\u017e\u00edvan\u011bj\u0161\u00ed t\u0159\u00edda zdvihac\u00edch \u0159et\u011bz\u016f<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-18988\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G80-lifting-chain.jpg\" alt=\"Zvedac\u00ed \u0159et\u011bz G80\" width=\"1200\" height=\"550\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G80-lifting-chain.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G80-lifting-chain-768x352.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G80-lifting-chain-18x8.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p>Kdy\u017e si koup\u00edte nebo se o tom dozv\u00edte <a href=\"https:\/\/tuohaihardware.com\/cs\/ocelovy-retez\/retez-g80\/\" target=\"_blank\" rel=\"noopener\">\u0158et\u011bz G80<\/a> Mo\u017en\u00e1 si poprv\u00e9 kladete ot\u00e1zku: pokud je \u0159et\u011bz G70 dostate\u010dn\u011b pevn\u00fd pro n\u011bkter\u00e9 aplikace zved\u00e1n\u00ed nad hlavou, pro\u010d st\u00e1le nen\u00ed povolen pro zved\u00e1n\u00ed? Hlavn\u00edm d\u016fvodem nen\u00ed jen pevnost, ale i odli\u0161n\u00e9 po\u017eadavky na bezpe\u010dnost p\u0159i pou\u017e\u00edv\u00e1n\u00ed.<\/p>\n<p>Modely G70 a G80 jsou navr\u017eeny pro dv\u011b zcela odli\u0161n\u00e1 odv\u011btv\u00ed. Model G70 se pou\u017e\u00edv\u00e1 k zaji\u0161t\u011bn\u00ed n\u00e1kladu b\u011bhem p\u0159epravy. Zat\u00edmco model G80 mus\u00ed krom\u011b pevnosti spl\u0148ovat i bezpe\u010dnostn\u00ed po\u017eadavky p\u0159i zved\u00e1n\u00ed t\u011b\u017ek\u00fdch b\u0159emen a vysoce rizikov\u00fdch aplikac\u00edch, v\u010detn\u011b \u0159et\u011bzov\u00fdch v\u00e1zac\u00edch mechanism\u016f, kladkostroj\u016f a je\u0159\u00e1b\u016f atd.<\/p>\n<p>Z tohoto d\u016fvodu mus\u00ed b\u00fdt \u0159et\u011bzy G80 vyrobeny nejen z legovan\u00e9 oceli vy\u0161\u0161\u00ed jakosti (v\u011bt\u0161ina z nich je <a href=\"https:\/\/tuohaihardware.com\/cs\/ocelovy-retez\/kratky-clankovy-retez\/\" target=\"_blank\" rel=\"noopener\">kr\u00e1tk\u00e9 \u010dl\u00e1nkov\u00e9 \u0159et\u011bzy<\/a>, (zv\u00fd\u0161en\u00ed pevnosti), ale tak\u00e9 podl\u00e9h\u00e1 p\u0159\u00edsn\u011bj\u0161\u00edmu tepeln\u00e9mu zpracov\u00e1n\u00ed kalen\u00edm a popou\u0161t\u011bn\u00edm. Ve srovn\u00e1n\u00ed s G70 m\u00e1 mnohem vy\u0161\u0161\u00ed po\u017eadavky jak na v\u00fdrobn\u00ed proces, tak na vlastnosti. Jeho povrch je obvykle o\u0161et\u0159en n\u00edzkoteplotn\u00ed \u00fapravou <a href=\"https:\/\/tuohaihardware.com\/cs\/co-je-cerny-oxid-je-vhodny-pro-vase-retezy\/\" target=\"_blank\" rel=\"noopener\">\u010dern\u00fd oxid<\/a>, co\u017e neovliv\u0148uje mechanick\u00e9 vlastnosti po tepeln\u00e9m zpracov\u00e1n\u00ed.<\/p>\n<p>G80 m\u00e1 p\u0159\u00edsn\u011bj\u0161\u00ed po\u017eadavky na r\u016fzn\u00e9 vlastnosti. Nejen\u017ee vy\u017eaduje vy\u0161\u0161\u00ed pevnost, ale tak\u00e9 mus\u00ed spl\u0148ovat \u0159adu bezpe\u010dnostn\u00edch norem, jako je nap\u0159\u00edklad rychlost prodlou\u017een\u00ed, hou\u017eevnatost, odolnost proti opot\u0159eben\u00ed a odolnost proti n\u00e1razu. <a href=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2024\/05\/EN-818-2-of-Short-Link-Chain-For-Lifting-Purposes.pdf\" target=\"_blank\" rel=\"noopener\">EN 818<\/a> a specifikace NACM G80 by prodlou\u017een\u00ed \u0159et\u011bzu G80 p\u0159ed p\u0159etr\u017een\u00edm nem\u011blo b\u00fdt men\u0161\u00ed ne\u017e 20%. To umo\u017e\u0148uje \u0159et\u011bzu deformovat se p\u0159ed zlomen\u00edm p\u0159i extr\u00e9mn\u00edm zat\u00ed\u017een\u00ed v aplikac\u00edch, jako jsou \u0159et\u011bzov\u00e9 v\u00e1zac\u00ed prost\u0159edky, kladkostroje a je\u0159\u00e1by, co\u017e vede k varov\u00e1n\u00ed p\u0159ed p\u0159etr\u017een\u00edm a zlep\u0161uje celkovou bezpe\u010dnostn\u00ed rezervu.<\/p>\n<h2>\u0158et\u011bz G100: \u0158e\u0161en\u00ed pro speci\u00e1ln\u00ed pracovn\u00ed podm\u00ednky<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-18989\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G100-chains.jpg\" alt=\"\u0158et\u011bzy G100\" width=\"1200\" height=\"550\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G100-chains.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G100-chains-768x352.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G100-chains-18x8.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p>\u0158et\u011bz G100 je vysoce pevn\u00fd <a href=\"http:\/\/e.com\/steel-chain\/alloy-chain\/\" target=\"_blank\" rel=\"noopener\">\u0159et\u011bz z legovan\u00e9 oceli<\/a>. Jedn\u00e1 se o vylep\u0161enou t\u0159\u00eddu, vy\u0161\u0161\u00ed ne\u017e G80. P\u0159i stejn\u00e9 velikosti poskytuje vy\u0161\u0161\u00ed pracovn\u00ed zat\u00ed\u017een\u00ed a pou\u017e\u00edv\u00e1 se hlavn\u011b pro aplikace s vy\u0161\u0161\u00edm zat\u00ed\u017een\u00edm nebo zdvihac\u00ed situace, kde je vy\u017eadov\u00e1no sn\u00ed\u017een\u00ed hmotnosti. Mnoho kupuj\u00edc\u00edch si m\u016f\u017ee myslet, \u017ee jeliko\u017e m\u00e1 G100 vy\u0161\u0161\u00ed pevnost, m\u011bli by si p\u0159\u00edmo zvolit G100. V re\u00e1ln\u00fdch projektech toto pochopen\u00ed nen\u00ed zcela spr\u00e1vn\u00e9, je t\u0159eba jej vyhodnotit na z\u00e1klad\u011b skute\u010dn\u00fdch pracovn\u00edch podm\u00ednek.<\/p>\n<p>\u0158et\u011bz G100 je vyroben z legovan\u00e9 oceli s vy\u0161\u0161\u00ed pevnost\u00ed a proch\u00e1z\u00ed p\u0159\u00edsn\u011bj\u0161\u00edmi procesy tepeln\u00e9ho zpracov\u00e1n\u00ed. Proto je p\u0159i stejn\u00e9 velikosti a pr\u016fm\u011bru dr\u00e1tu MBF (minim\u00e1ln\u00ed pevnost v tahu) a zku\u0161ebn\u00ed \u00fanosnost u G100 vy\u0161\u0161\u00ed ne\u017e u G80. Pokud v\u00e1\u0161 projekt vy\u017eaduje vy\u0161\u0161\u00ed nosnost nebo pot\u0159ebuje sn\u00ed\u017eit celkovou hmotnost zvedac\u00edho syst\u00e9mu, pak je \u0159et\u011bz G100 ide\u00e1ln\u00edm \u0159e\u0161en\u00edm.<\/p>\n<p>Nap\u0159\u00edklad u zdvihac\u00edho \u0159et\u011bzu o \u0161\u00ed\u0159ce 10 mm je jmenovit\u00e9 pracovn\u00ed zat\u00ed\u017een\u00ed \u0159et\u011bzu G80 obvykle asi 3,15 tuny, zat\u00edmco u \u0159et\u011bzu G100 m\u016f\u017ee dos\u00e1hnout asi 4 tun. To znamen\u00e1, \u017ee u stejn\u00e9 velikosti \u0159et\u011bzu je mezn\u00ed pracovn\u00ed zat\u00ed\u017een\u00ed \u0159et\u011bzu G100 nejm\u00e9n\u011b o 251 TP3T vy\u0161\u0161\u00ed ne\u017e u \u0159et\u011bzu G80. Proto se \u0159et\u011bz G100 obvykle pou\u017e\u00edv\u00e1 v odv\u011btv\u00edch s p\u0159\u00edsn\u011bj\u0161\u00edmi po\u017eadavky na bezpe\u010dnost a zat\u00ed\u017een\u00ed, jako jsou instalace v\u011btrn\u00fdch elektr\u00e1ren, offshore in\u017een\u00fdrstv\u00ed, v\u00fdroba velk\u00fdch za\u0159\u00edzen\u00ed a t\u011b\u017eba, zat\u00edmco pro v\u0161eobecn\u00e9 pr\u016fmyslov\u00e9 zdvihac\u00ed aplikace se st\u00e1le pou\u017e\u00edv\u00e1 hlavn\u011b \u0159et\u011bz G80.<\/p>\n<p>Je d\u016fle\u017eit\u00e9 si uv\u011bdomit, \u017ee pro v\u011bt\u0161inu pr\u016fmyslov\u00fdch zdvihac\u00edch projekt\u016f je G80 ji\u017e dostate\u010dn\u00fd k uspokojen\u00ed v\u0161ech po\u017eadavk\u016f a jeho po\u0159izovac\u00ed cena je ni\u017e\u0161\u00ed ne\u017e u G100. Pokud zvol\u00edte G100 bez zohledn\u011bn\u00ed skute\u010dn\u00fdch pot\u0159eb, m\u016f\u017ee to nejen zv\u00fd\u0161it zbyte\u010dn\u00e9 n\u00e1klady na po\u0159\u00edzen\u00ed, ale tak\u00e9 vy\u017eadovat upgrade ve\u0161ker\u00e9ho souvisej\u00edc\u00edho zdvihac\u00edho p\u0159\u00edslu\u0161enstv\u00ed (nap\u0159\u00edklad h\u00e1k\u016f) na G100. V opa\u010dn\u00e9m p\u0159\u00edpad\u011b bude jmenovit\u00e1 nosnost cel\u00e9ho zdvihac\u00edho syst\u00e9mu ur\u010dena nejni\u017e\u0161\u00ed t\u0159\u00eddou komponent\u016f v syst\u00e9mu.<\/p>\n<h2><strong>Porovn\u00e1vac\u00ed tabulka t\u0159\u00edd \u0159et\u011bz\u016f<\/strong><\/h2>\n<table>\n<tbody>\n<tr>\n<td width=\"8.7000%\"><strong><b>\u0158et\u011bzov\u00e1 t\u0159\u00edda<\/b><\/strong><\/td>\n<td width=\"14.6200%\"><strong><b>Tak\u00e9 zn\u00e1m\u00fd jako<\/b><\/strong><\/td>\n<td width=\"14.0000%\"><strong><b>Materi\u00e1l<\/b><\/strong><\/td>\n<td width=\"26.3800%\"><strong><b>Typick\u00e9 aplikace<\/b><\/strong><\/td>\n<td width=\"17.7800%\"><strong><b>Nem\u011blo by se pou\u017e\u00edvat pro<\/b><\/strong><\/td>\n<td width=\"15.9800%\"><strong><b>Spole\u010dn\u00e9 trhy<\/b><\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"8.7000%\"><strong>G30<\/strong><\/td>\n<td width=\"14.6200%\">Proof Coil \u0158et\u011bz<\/td>\n<td width=\"14.0000%\">N\u00edzkouhl\u00edkov\u00e1 ocel<\/td>\n<td width=\"26.3800%\">\u0158et\u011bz pro v\u0161eobecn\u00e9 pou\u017eit\u00ed, zem\u011bd\u011blsk\u00fd \u0159et\u011bz, bari\u00e9rov\u00fd \u0159et\u011bz<\/td>\n<td width=\"17.7800%\">Stropn\u00ed zved\u00e1n\u00ed<\/td>\n<td width=\"15.9800%\">Celosv\u011btov\u011b<\/td>\n<\/tr>\n<tr>\n<td width=\"8.7000%\"><strong>G40<\/strong><\/td>\n<td width=\"14.6200%\">\u0158et\u011bz st\u0159edn\u00ed pevnosti<\/td>\n<td width=\"14.0000%\">St\u0159edn\u011b uhl\u00edkov\u00e1 ocel<\/td>\n<td width=\"26.3800%\">N\u00e1mo\u0159n\u00ed \u0159et\u011bzec, zem\u011bd\u011blsk\u00fd \u0159et\u011bzec, pr\u016fmyslov\u00fd \u0159et\u011bzec<\/td>\n<td width=\"17.7800%\">Stropn\u00ed zved\u00e1n\u00ed<\/td>\n<td width=\"15.9800%\">Austr\u00e1lie a Nov\u00fd Z\u00e9land<\/td>\n<\/tr>\n<tr>\n<td width=\"8.7000%\"><strong>G43<\/strong><\/td>\n<td width=\"14.6200%\">Vysoce testovan\u00fd \u0159et\u011bz<\/td>\n<td width=\"14.0000%\">Tepeln\u011b zpracovan\u00e1 uhl\u00edkov\u00e1 ocel<\/td>\n<td width=\"26.3800%\">Pr\u016fmyslov\u00fd ta\u017en\u00fd \u0159et\u011bz, Lesnick\u00fd \u0159et\u011bz, Zem\u011bd\u011blsk\u00fd \u0159et\u011bz<\/td>\n<td width=\"17.7800%\">Stropn\u00ed zved\u00e1n\u00ed<\/td>\n<td width=\"15.9800%\">USA a Kanada<\/td>\n<\/tr>\n<tr>\n<td width=\"8.7000%\"><strong>G70<\/strong><\/td>\n<td width=\"14.6200%\">Dopravn\u00ed \u0159et\u011bzec<\/td>\n<td width=\"14.0000%\">Tepeln\u011b zpracovan\u00e1 uhl\u00edkov\u00e1 ocel<\/td>\n<td width=\"26.3800%\">\u0158et\u011bz pro zaji\u0161t\u011bn\u00ed n\u00e1kladu, upev\u0148ovac\u00ed \u0159et\u011bz, \u0159et\u011bz pro v\u00e1z\u00e1n\u00ed n\u00e1kladu<\/td>\n<td width=\"17.7800%\">Zved\u00e1n\u00ed nad hlavou, \u0159et\u011bzov\u00fd z\u00e1v\u011bs<\/td>\n<td width=\"15.9800%\">USA a Kanada<\/td>\n<\/tr>\n<tr>\n<td width=\"8.7000%\"><strong>G80<\/strong><\/td>\n<td width=\"14.6200%\">Zvedac\u00ed \u0159et\u011bz ze slitiny<\/td>\n<td width=\"14.0000%\">Tepeln\u011b zpracovan\u00e1 legovan\u00e1 ocel<\/td>\n<td width=\"26.3800%\">\u0158et\u011bzov\u00fd z\u00e1v\u011bs, je\u0159\u00e1bov\u00e9 zved\u00e1n\u00ed, kladkostroj<\/td>\n<td width=\"17.7800%\">Zabezpe\u010den\u00ed n\u00e1kladu<\/td>\n<td width=\"15.9800%\">Glob\u00e1ln\u00ed<\/td>\n<\/tr>\n<tr>\n<td width=\"8.7000%\"><strong>G100<\/strong><\/td>\n<td width=\"14.6200%\">Zvedac\u00ed \u0159et\u011bz t\u0159\u00eddy 100<\/td>\n<td width=\"14.0000%\">Vysokopevnostn\u00ed legovan\u00e1 ocel<\/td>\n<td width=\"26.3800%\"><a href=\"https:\/\/tuohaihardware.com\/cs\/ocelovy-retez\/tezky-retez\/\" target=\"_blank\" rel=\"noopener\">Zved\u00e1n\u00ed t\u011b\u017ek\u00fdch b\u0159emen<\/a>, Zved\u00e1n\u00ed na mo\u0159i, Zved\u00e1n\u00ed pro v\u011btrnou energii<\/td>\n<td width=\"17.7800%\">Obecn\u00e1 u\u017eite\u010dnost<\/td>\n<td width=\"15.9800%\">Glob\u00e1ln\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Po pochopen\u00ed rozd\u00edl\u016f mezi t\u011bmito jakostmi \u0159et\u011bz\u016f je lze jednodu\u0161e shrnout n\u00e1sledovn\u011b:<\/p>\n<p><strong>G30: \u0158et\u011bzec obecn\u00fdch u\u017eitkov\u00fdch slu\u017eeb<\/strong><\/p>\n<p>Vhodn\u00e9 pro v\u0161eobecn\u00e9 pou\u017eit\u00ed, jako je lehk\u00fd pr\u016fmysl, zem\u011bd\u011blstv\u00ed, oplocen\u00ed a ka\u017edodenn\u00ed zaji\u0161\u0165ovac\u00ed aplikace.<\/p>\n<p><strong>G40, G43: Pr\u016fmyslov\u00fd ta\u017en\u00fd a z\u00e1dr\u017en\u00fd \u0159et\u011bz<\/strong><\/p>\n<p>Vhodn\u011bj\u0161\u00ed pro st\u0159edn\u011b n\u00e1ro\u010dn\u00e9 aplikace, jako nap\u0159. <a href=\"https:\/\/tuohaihardware.com\/cs\/ocelovy-retez\/tazny-retez\/\" target=\"_blank\" rel=\"noopener\">pr\u016fmyslov\u00e9 odtahov\u00e1n\u00ed<\/a>, zabezpe\u010den\u00ed za\u0159\u00edzen\u00ed a zem\u011bd\u011blsk\u00e9 stroje.<\/p>\n<p><strong>G70: Dopravn\u00ed \u0159et\u011bzec<\/strong><\/p>\n<p>Nejb\u011b\u017en\u011bj\u0161\u00ed \u0159et\u011bz pro zaji\u0161t\u011bn\u00ed n\u00e1kladu a upevn\u011bn\u00ed n\u00e1kladn\u00edch vozidel v severoamerick\u00e9m dopravn\u00edm pr\u016fmyslu.<\/p>\n<p><strong>G80, G100: Zvedac\u00ed \u0159et\u011bz ze slitiny<\/strong><\/p>\n<p>Speci\u00e1ln\u011b navr\u017eeno pro zdvihac\u00ed aplikace, jako je \u0159et\u011bzov\u00e9 v\u00e1z\u00e1n\u00ed, zved\u00e1n\u00ed je\u0159\u00e1bem a zved\u00e1n\u00ed nad hlavou.<\/p>\n<h2>Jak rozpoznat r\u016fzn\u00e9 t\u0159\u00eddy \u0159et\u011bzu?<\/h2>\n<p>Nyn\u00ed ji\u017e ch\u00e1pete rozd\u00edly mezi jakostmi \u0159et\u011bz\u016f. Dal\u0161\u00ed ot\u00e1zka, kter\u00e1 zaj\u00edm\u00e1 mnoho kupuj\u00edc\u00edch, je: jak si po obdr\u017een\u00ed \u0159et\u011bzu m\u016f\u017eete ov\u011b\u0159it, zda skute\u010dn\u011b odpov\u00edd\u00e1 jakosti, kterou jste zadali?<\/p>\n<p>Prvn\u00ed reakc\u00ed mnoha lid\u00ed je pohled na barvu, nap\u0159\u00edklad kdy\u017e si mysl\u00ed, \u017ee \u017elut\u00e1 znamen\u00e1 G70 a \u010dern\u00e1 G80. Tato metoda v\u0161ak nen\u00ed spolehliv\u00e1. Volba barvy je pouze postup povrchov\u00e9 \u00fapravy pou\u017e\u00edvan\u00fd v\u00fdrobci. Nejedn\u00e1 se o mezin\u00e1rodn\u00ed standard. R\u016fzn\u00ed v\u00fdrobci mohou pou\u017e\u00edvat r\u016fzn\u00e9 barvy. Barvu lze proto pou\u017e\u00edt pouze jako referenci a nelze ji pou\u017e\u00edt jako z\u00e1klad pro ur\u010den\u00ed jakosti \u0159et\u011bzu.<\/p>\n<h3>Zkontrolujte trval\u00e9 ozna\u010den\u00ed na spoji<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-18990\" src=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G70.jpg\" alt=\"\u0159et\u011bzy G70\" width=\"1200\" height=\"550\" srcset=\"https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G70.jpg 1200w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G70-768x352.jpg 768w, https:\/\/tuohaihardware.com\/wp-content\/uploads\/2026\/07\/G70-18x8.jpg 18w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p>Nejp\u0159\u00edm\u011bj\u0161\u00edm zp\u016fsobem je kontrola trval\u00e9ho ozna\u010den\u00ed na \u010dl\u00e1nku \u0159et\u011bzu. To je tak\u00e9 prvn\u00ed krok k ov\u011b\u0159en\u00ed jakosti \u0159et\u011bzu.<\/p>\n<p>Na spr\u00e1vn\u00fdch pr\u016fmyslov\u00fdch \u0159et\u011bzech maj\u00ed n\u011bkter\u00e9 \u010dl\u00e1nky obvykle vyra\u017een\u00e9 ozna\u010den\u00ed, kter\u00e9 ud\u00e1v\u00e1 jakost, nap\u0159\u00edklad G43, G70, G80, G100, a n\u011bkdy tak\u00e9 logo v\u00fdrobce. Toto ozna\u010den\u00ed je obvykle obt\u00ed\u017en\u00e9 zm\u011bnit, tak\u017ee je lze pou\u017e\u00edt jako z\u00e1kladn\u00ed a spolehliv\u00fd referen\u010dn\u00ed bod pro identifikaci jakosti \u0159et\u011bzu.<\/p>\n<h3>Zkontrolujte technickou dokumentaci a zku\u0161ebn\u00ed protokoly<\/h3>\n<p>Pokud v\u00e1\u0161 projekt zahrnuje aplikace, jako je zaji\u0161t\u011bn\u00ed p\u0159epravy, t\u011b\u017ek\u00e1 za\u0159\u00edzen\u00ed nebo zved\u00e1n\u00ed nad hlavou, m\u011bli byste tak\u00e9 po\u017e\u00e1dat v\u00fdrobce nebo dodavatele o poskytnut\u00ed kontroln\u00edch dokument\u016f pro danou \u0161ar\u017ei \u0159et\u011bzu, jako nap\u0159\u00edklad:<\/p>\n<ul>\n<li>Materi\u00e1ln\u00ed certifik\u00e1t<\/li>\n<li>Zku\u0161ebn\u00ed protokol<\/li>\n<li>Mezn\u00ed pracovn\u00ed zat\u00ed\u017een\u00ed (WLL)<\/li>\n<li>Minim\u00e1ln\u00ed s\u00edla p\u0159i p\u0159etr\u017een\u00ed<\/li>\n<\/ul>\n<p>Tyto dokumenty a \u00fadaje v\u00e1m mohou pomoci d\u00e1le potvrdit, zda \u0159et\u011bz spl\u0148uje v\u00fdkonnostn\u00ed po\u017eadavky dan\u00e9 t\u0159\u00eddy.<\/p>\n<h3>Potvr\u010fte platn\u00e9 normy<\/h3>\n<p>Krom\u011b toho je tak\u00e9 nutn\u00e9 potvrdit platn\u00e9 normy pro danou \u0161ar\u017ei \u0159et\u011bzu, proto\u017ee r\u016fzn\u00e9 oblasti pou\u017eit\u00ed se mohou \u0159\u00eddit r\u016fzn\u00fdmi normami.<\/p>\n<ul>\n<li>Na severoamerick\u00e9m trhu se b\u011b\u017en\u011b pou\u017e\u00edvaj\u00ed normy NACM a ASTM. \u0158et\u011bzy pro zaji\u0161t\u011bn\u00ed p\u0159epravy mus\u00ed tak\u00e9 spl\u0148ovat po\u017eadavky FMCSA.<\/li>\n<li>Pro zvedac\u00ed \u0159et\u011bzy, jako jsou G80 a G100, se \u010dast\u011bji odkazuje na normu EN 818-2.<\/li>\n<li>U n\u011bkter\u00fdch speci\u00e1ln\u00edch projekt\u016f je p\u0159\u00edslu\u0161n\u00e1 norma stejn\u011b d\u016fle\u017eit\u00e1 jako t\u0159\u00edda oceli, proto\u017ee r\u016fzn\u00e9 zem\u011b mohou pro stejnou t\u0159\u00eddu pou\u017e\u00edvat r\u016fzn\u00e9 normy a zku\u0161ebn\u00ed po\u017eadavky a ty se nemus\u00ed \u00fapln\u011b shodovat.<\/li>\n<\/ul>\n<h3>Identifikace \u0159et\u011bz\u016f bez trval\u00e9ho zna\u010den\u00ed<\/h3>\n<p>Je d\u016fle\u017eit\u00e9 si uv\u011bdomit, \u017ee ne v\u0161echny \u0159et\u011bzy maj\u00ed trval\u00e9 vyra\u017een\u00e9 ozna\u010den\u00ed.<\/p>\n<p>U \u0159et\u011bz\u016f pro v\u0161eobecn\u00e9 pou\u017eit\u00ed, jako jsou n\u011bkter\u00e9 produkty G30 nebo G40, m\u016f\u017ee mnoho v\u00fdrobc\u016f tento proces vynechat, aby sn\u00ed\u017eili n\u00e1klady. V t\u011bchto p\u0159\u00edpadech je t\u0159\u00edda identifikov\u00e1na pouze pomoc\u00ed \u0161t\u00edtk\u016f na v\u00fdrobku nebo obalu.<\/p>\n<p>Proto je u \u0159et\u011bz\u016f bez vyra\u017een\u00e9ho ozna\u010den\u00ed je\u0161t\u011b d\u016fle\u017eit\u011bj\u0161\u00ed ov\u011b\u0159it jakost kontrolou informac\u00ed o produktu, zku\u0161ebn\u00edch protokol\u016f a technick\u00e9 dokumentace poskytnut\u00e9 dodavatelem, sp\u00ed\u0161e ne\u017e posuzovat pouze podle vzhledu.<\/p>\n<p>Obecn\u011b by se identifikace \u0159et\u011bzov\u00fdch jakost\u00ed m\u011bla \u0159\u00eddit z\u00e1kladn\u00edm principem (t\u0159\u00edvrstv\u00fd ov\u011b\u0159ovac\u00ed syst\u00e9m): trval\u00e9 zna\u010den\u00ed + technick\u00e1 dokumentace + p\u0159\u00edslu\u0161n\u00e9 normy.<\/p>\n<h2><strong>Z\u00e1v\u011br<\/strong><\/h2>\n<p>Ozna\u010den\u00ed jakosti \u0159et\u011bzu nen\u00ed jen jednoduch\u00e9. V podstat\u011b nejen p\u0159edstavuje rozd\u00edl v pevnosti mezi r\u016fzn\u00fdmi \u0159et\u011bzy, ale tak\u00e9 odr\u00e1\u017e\u00ed rozd\u00edly ve v\u00fdrobn\u00edch procesech a odpov\u00edd\u00e1 r\u016fzn\u00fdm sc\u00e9n\u00e1\u0159\u016fm pou\u017eit\u00ed, jako je obecn\u00e9 zaji\u0161t\u011bn\u00ed, pr\u016fmyslov\u00e9 ta\u017een\u00ed, p\u0159epravn\u00ed upevn\u011bn\u00ed a zdvihac\u00ed operace. P\u0159i identifikaci jakost\u00ed \u0159et\u011bzu nejsou nejd\u016fle\u017eit\u011bj\u0161\u00edmi faktory vzhled, ale ov\u011b\u0159iteln\u00e9 informace, jako jsou trval\u00e9 ozna\u010den\u00ed na \u010dl\u00e1nc\u00edch \u0159et\u011bzu, inspek\u010dn\u00ed dokumenty a p\u0159\u00edslu\u0161n\u00e9 normy.<\/p>\n<p>Pokud si p\u0159i samotn\u00e9m n\u00e1kupu nejste jisti, jakou t\u0159\u00eddu pot\u0159ebujete, m\u016f\u017eete se tak\u00e9 obr\u00e1tit <a href=\"https:\/\/tuohaihardware.com\/cs\/\" target=\"_blank\" rel=\"noopener\">TUOHAI<\/a> p\u0159\u00edmo. D\u00edky dlouholet\u00fdm zku\u0161enostem s v\u00fdrobou a exportem v\u00e1m m\u016f\u017eeme pomoci s v\u00fdb\u011brem spr\u00e1vn\u00e9 jakosti na z\u00e1klad\u011b va\u0161ich specifick\u00fdch po\u017eadavk\u016f a vyhnout se ztr\u00e1t\u00e1m a rizik\u016fm zp\u016fsoben\u00fdm nespr\u00e1vn\u00fdm v\u00fdb\u011brem.<\/p>\n<hr \/>\n<h2><strong>Nej\u010dast\u011bj\u0161\u00ed dotazy<\/strong><\/h2>\n<h3><strong>Jak mohu zkontrolovat, zda je \u0159et\u011bz skute\u010dn\u011b dimenzov\u00e1n na zat\u00ed\u017een\u00ed?<\/strong><\/h3>\n<p>Pokud kupujete \u0159et\u011bzy a chcete si ov\u011b\u0159it, zda se jedn\u00e1 o \u0159et\u011bz s nosnost\u00ed, nejp\u0159\u00edm\u011bj\u0161\u00ed metodou je zkontrolovat vyra\u017een\u00e9 ozna\u010den\u00ed na \u010dl\u00e1nc\u00edch \u0159et\u011bzu, nap\u0159\u00edklad G70, G80 nebo G100.<\/p>\n<p>Ve v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f maj\u00ed spr\u00e1vn\u00e9 zvedac\u00ed \u0159et\u011bzy na povrchu \u010dl\u00e1nk\u016f identifika\u010dn\u00ed zna\u010dky a tyto zna\u010dky se obvykle opakuj\u00ed v pravideln\u00fdch intervalech pod\u00e9l \u0159et\u011bzu.<\/p>\n<p>Pokud na povrchu \u0159et\u011bzu nenajdete \u017e\u00e1dn\u00e9 ozna\u010den\u00ed, je velmi pravd\u011bpodobn\u00e9, \u017ee se jedn\u00e1 pouze o univerz\u00e1ln\u00ed pr\u016fmyslov\u00fd \u0159et\u011bz. V tomto p\u0159\u00edpad\u011b se nedoporu\u010duje jej pou\u017e\u00edvat ke zved\u00e1n\u00ed, t\u011b\u017ek\u00e9mu nakl\u00e1d\u00e1n\u00ed ani k \u017e\u00e1dn\u00fdm jin\u00fdm bezpe\u010dnostn\u00edm aplikac\u00edm.<\/p>\n<h3><strong>M\u016f\u017ee se ozna\u010den\u00ed t\u0159\u00eddy \u0159et\u011bzu li\u0161it mezi v\u00fdrobci?<\/strong><\/h3>\n<p>Ano.<\/p>\n<p>P\u0159esto\u017ee jsou jakostn\u00ed t\u0159\u00eddy \u0159et\u011bz\u016f zalo\u017eeny na podobn\u00fdch norm\u00e1ch, r\u016fzn\u00ed v\u00fdrobci mohou pou\u017e\u00edvat r\u016fzn\u00e9 materi\u00e1ly, procesy tepeln\u00e9ho zpracov\u00e1n\u00ed a zku\u0161ebn\u00ed metody. V d\u016fsledku toho se skute\u010dn\u00e1 kvalita \u0159et\u011bz\u016f m\u016f\u017ee u jednotliv\u00fdch dodavatel\u016f li\u0161it.<\/p>\n<p>Nap\u0159\u00edklad \u0159et\u011bzy G80 od n\u011bkter\u00fdch v\u00fdrobc\u016f mohou m\u00edt mezn\u00ed zat\u00ed\u017een\u00ed o 5%\u201310% ni\u017e\u0161\u00ed ne\u017e jmenovit\u00fd standard, ale st\u00e1le mohou b\u00fdt ozna\u010deny jako G80.<\/p>\n<p>Proto byste se p\u0159i n\u00e1kupu \u0159et\u011bz\u016f nem\u011bli spol\u00e9hat pouze na ozna\u010den\u00ed t\u0159\u00eddy. Je tak\u00e9 d\u016fle\u017eit\u00e9 zkontrolovat zku\u0161ebn\u00ed protokoly poskytnut\u00e9 dodavatelem.<\/p>\n<h3><strong>Je barva \u0159et\u011bzu spolehliv\u00fdm zp\u016fsobem, jak ur\u010dit jeho jakost?<\/strong><\/h3>\n<p>\u017d\u00e1dn\u00fd.<\/p>\n<p>Jak vid\u00edte, p\u0159i ka\u017edodenn\u00edm pou\u017e\u00edv\u00e1n\u00ed je v\u011bt\u0161ina \u0159et\u011bz\u016f G70 \u017elut\u00e1 a \u0159et\u011bzy G80 jsou obvykle \u010dern\u00e9. Jedn\u00e1 se v\u0161ak pouze o b\u011b\u017enou praxi v\u00fdrobc\u016f, nikoli o mezin\u00e1rodn\u00ed standard.<\/p>\n<p>\u0158et\u011bz G70 m\u016f\u017ee b\u00fdt v r\u016fzn\u00fdch zem\u00edch \u017elut\u00fd, pozinkovan\u00fd nebo dokonce v barv\u011b p\u0159\u00edrodn\u00ed oceli. Barvu \u0159et\u011bzu lze proto pou\u017e\u00edt pouze jako referen\u010dn\u00ed faktor p\u0159i posuzov\u00e1n\u00ed jakosti a nelze ji pou\u017e\u00edt k p\u0159\u00edm\u00e9mu ur\u010den\u00ed jakosti \u0159et\u011bzu.<\/p>\n<h3><strong>Jak\u00e9 dokumenty prokazuj\u00ed, \u017ee \u0159et\u011bz je certifikov\u00e1n pro konkr\u00e9tn\u00ed stupe\u0148?<\/strong><\/h3>\n<p>Pokud pot\u0159ebujete potvrdit, \u017ee \u0159et\u011bz, kter\u00fd jste obdr\u017eeli, skute\u010dn\u011b odpov\u00edd\u00e1 deklarovan\u00e9 jakosti, m\u011bli byste si od dodavatele vy\u017e\u00e1dat n\u00e1sleduj\u00edc\u00ed dokumenty:<\/p>\n<ul>\n<li>Zku\u0161ebn\u00ed protokol<\/li>\n<li>Mezn\u00ed pracovn\u00ed zat\u00ed\u017een\u00ed (\u00fadaje WLL)<\/li>\n<li>Breaking Load<\/li>\n<li>Materi\u00e1ln\u00ed certifik\u00e1t<\/li>\n<\/ul>\n<p>Spolehliv\u00fd v\u00fdrobce \u0159et\u011bz\u016f obvykle m\u016f\u017ee poskytnout v\u0161echny tyto dokumenty. Slou\u017e\u00ed k ov\u011b\u0159en\u00ed, zda dod\u00e1van\u00fd \u0159et\u011bz spl\u0148uje odpov\u00eddaj\u00edc\u00ed normu.<\/p>\n<h3><strong>Jsou jakosti \u0159et\u011bz\u016f jako G30, G70 a G80 standardizov\u00e1ny celosv\u011btov\u011b?<\/strong><\/h3>\n<p>Ne, nen\u00ed to pln\u011b sjednocen\u00e9.<\/p>\n<p>T\u0159\u00eddy \u0159et\u011bz\u016f jako G30, G70, G40, G43 a G80 jsou celosv\u011btov\u011b uzn\u00e1van\u00fdm syst\u00e9mem hodnocen\u00ed, ale nep\u0159edstavuj\u00ed zcela jednotn\u00fd mezin\u00e1rodn\u00ed standard.<\/p>\n<p>R\u016fzn\u00e9 regiony pou\u017e\u00edvaj\u00ed r\u016fzn\u00e9 standardn\u00ed syst\u00e9my pro v\u00fdrobu a certifikaci, nap\u0159\u00edklad:<\/p>\n<ul>\n<li>Severn\u00ed Amerika: NACM \/ ASTM<\/li>\n<li>Evropa: EN 818<\/li>\n<li>Austr\u00e1lie: AS\/NZS<\/li>\n<\/ul>\n<p>P\u0159esto\u017ee tyto syst\u00e9my definuj\u00ed podobn\u00e9 klasifikace jakost\u00ed \u0159et\u011bz\u016f po cel\u00e9m sv\u011bt\u011b, v\u00fdrobn\u00ed procesy, zku\u0161ebn\u00ed metody a certifika\u010dn\u00ed po\u017eadavky se mohou mezi normami st\u00e1le li\u0161it.<\/p>\n<h3><strong>Pro\u010d n\u011bkter\u00e9 \u0159et\u011bzy nemaj\u00ed viditeln\u00e9 ozna\u010den\u00ed stupn\u011b?<\/strong><\/h3>\n<p>\u0158et\u011bzy bez jak\u00e9hokoli vyra\u017een\u00e9ho ozna\u010den\u00ed jsou obvykle univerz\u00e1ln\u00ed \u0159et\u011bzy G30 nebo G40. Tyto typy \u0159et\u011bz\u016f se pou\u017e\u00edvaj\u00ed pro aplikace, kter\u00e9 nejsou ur\u010deny k zved\u00e1n\u00ed, a mus\u00ed spl\u0148ovat pouze z\u00e1kladn\u00ed po\u017eadavky na pevnost v tahu. Neexistuj\u00ed \u017e\u00e1dn\u00e9 p\u0159\u00edsn\u00e9 po\u017eadavky na bezpe\u010dnostn\u00ed certifikaci ani \u00faplnou sledovatelnost, tak\u017ee n\u011bkte\u0159\u00ed v\u00fdrobci proces zna\u010den\u00ed ru\u0161\u00ed, aby sn\u00ed\u017eili v\u00fdrobn\u00ed n\u00e1klady.<\/p>\n<p>Pokud se v\u0161ak \u0159et\u011bz pou\u017e\u00edv\u00e1 pro zved\u00e1n\u00ed nebo p\u0159epravu, nedoporu\u010duje se pou\u017e\u00edvat neozna\u010den\u00e9 \u0159et\u011bzy. Bez jak\u00e9koli identifikace nelze potvrdit t\u0159\u00eddu \u0159et\u011bzu ani p\u0159\u00edslu\u0161nou normu, co\u017e p\u0159edstavuje vy\u0161\u0161\u00ed bezpe\u010dnostn\u00ed riziko b\u011bhem pou\u017e\u00edv\u00e1n\u00ed.<\/p>\n<h3><strong>Mus\u00ed h\u00e1\u010dky a kov\u00e1n\u00ed odpov\u00eddat stejn\u00e9 t\u0159\u00edd\u011b \u0159et\u011bzu?<\/strong><\/h3>\n<p>Pokud se zakoupen\u00fd \u0159et\u011bz pou\u017e\u00edv\u00e1 pro zvedac\u00ed syst\u00e9m (\u0159et\u011bzov\u00fd z\u00e1v\u011bs), mus\u00ed v\u0161echny spoje odpov\u00eddat stejn\u00e9 t\u0159\u00edd\u011b \u0159et\u011bzu.<\/p>\n<p>Nap\u0159\u00edklad \u0159et\u011bz G80 mus\u00ed b\u00fdt pou\u017eit s h\u00e1ky, hlavn\u00edmi \u010dl\u00e1nky a dal\u0161\u00edm p\u0159\u00edslu\u0161enstv\u00edm G80. Pokud je jak\u00e1koli sou\u010d\u00e1st syst\u00e9mu ni\u017e\u0161\u00ed t\u0159\u00eddy, nap\u0159\u00edklad spojovac\u00ed \u010dl\u00e1nek G70, pak mus\u00ed b\u00fdt nosnost cel\u00e9ho syst\u00e9mu vypo\u010d\u00edt\u00e1na na z\u00e1klad\u011b G70. Jin\u00fdmi slovy, celkov\u00e1 nosnost je v\u017edy omezena nejni\u017e\u0161\u00ed jmenovitou sou\u010d\u00e1st\u00ed syst\u00e9mu.<\/p>\n<h3><strong>Jak\u00e9 je riziko pou\u017eit\u00ed materi\u00e1lu G70 ve zdvihac\u00edch aplikac\u00edch?<\/strong><\/h3>\n<p>Pou\u017e\u00edv\u00e1n\u00ed \u0159et\u011bzu G70 pro zved\u00e1n\u00ed je velmi nebezpe\u010dn\u00e1 chyba. P\u0159esto\u017ee je G70 vysoce pevn\u00fd \u0159et\u011bz, je ur\u010den p\u0159edev\u0161\u00edm pro p\u0159epravn\u00ed upevn\u011bn\u00ed a v\u00e1z\u00e1n\u00ed b\u0159emen, nikoli pro zved\u00e1n\u00ed nad hlavou.<\/p>\n<p>Krom\u011b toho se G70 obvykle nevyr\u00e1b\u00ed podle norem pro zvedac\u00ed \u0159et\u011bzy, jako je EN 818, tak\u017ee nespl\u0148uje bezpe\u010dnostn\u00ed po\u017eadavky pro tento typ pou\u017eit\u00ed. Pokud se G70 pou\u017e\u00edv\u00e1 p\u0159i zved\u00e1n\u00ed vysok\u00fdch b\u0159emen, m\u016f\u017ee selhat v d\u016fsledku nedostate\u010dn\u00e9 bezpe\u010dnostn\u00ed rezervy nebo r\u00e1zov\u00e9ho zat\u00ed\u017een\u00ed, co\u017e m\u016f\u017ee v\u00e9st k n\u00e1hl\u00e9mu zlomen\u00ed a v\u00e1\u017en\u00fdm bezpe\u010dnostn\u00edm rizik\u016fm.<\/p>\n<h3><strong>Jak \u010dasto by se m\u011bly zvedac\u00ed \u0159et\u011bzy kontrolovat nebo vym\u011b\u0148ovat?<\/strong><\/h3>\n<p>Pokud pou\u017e\u00edv\u00e1te zvedac\u00ed \u0159et\u011bzy G80 \/ G100 v pr\u016fmyslov\u00e9m prost\u0159ed\u00ed, obecn\u00e1 doporu\u010den\u00ed jsou:<\/p>\n<ul>\n<li>P\u0159ed ka\u017ed\u00fdm pou\u017eit\u00edm zkontrolujte<\/li>\n<li>N\u00e1ro\u010dn\u00e9 pou\u017e\u00edv\u00e1n\u00ed: prov\u00e1d\u011bjte kompletn\u00ed kontrolu ka\u017ed\u00e9 3\u20136 m\u011bs\u00edc\u016f<\/li>\n<li>B\u011b\u017en\u00e9 pou\u017e\u00edv\u00e1n\u00ed: vym\u011b\u0148te nebo prove\u010fte kompletn\u00ed kontrolu ka\u017ed\u00e9 1\u20132 roky<\/li>\n<li>Pokud \u0159et\u011bz vykazuje zn\u00e1mky prodlou\u017een\u00ed, deformace nebo povrchov\u00fdch prasklin, mus\u00ed b\u00fdt okam\u017eit\u011b vy\u0159azen z provozu a vym\u011bn\u011bn.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>When you purchase industrial steel chains, you will often see grade markings such as G30, G40, G43, G70, G80, and G100. These chains may look [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":18986,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-18979","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - 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