{"id":9,"date":"2026-06-04T18:44:52","date_gmt":"2026-06-04T16:44:52","guid":{"rendered":"https:\/\/www.matai.cz\/blog\/produktova-srovnani\/"},"modified":"2026-06-04T18:44:52","modified_gmt":"2026-06-04T16:44:52","slug":"produktova-srovnani","status":"publish","type":"page","link":"https:\/\/www.matai.cz\/blog\/produktova-srovnani\/","title":{"rendered":"Produktov\u00e1 srovn\u00e1n\u00ed spojovac\u00edho materi\u00e1lu | DIN, nerez, pevnost | MATAI"},"content":{"rendered":"<p>P\u0159i v\u00fdb\u011bru spojovac\u00edho materi\u00e1lu se rozhodnut\u00ed \u010dasto redukuje na jednu ot\u00e1zku: kter\u00e1 ze dvou podobn\u00fdch variant je pro dan\u00fd spoj spr\u00e1vn\u00e1? Tento rozcestn\u00edk shrnuje nej\u010dast\u011bj\u0161\u00ed srovn\u00e1n\u00ed &ndash; norem, materi\u00e1l\u016f, pevnostn\u00edch t\u0159\u00edd i povrchov\u00fdch \u00faprav &ndash; a odkazuje na podrobn\u00e9 srovn\u00e1vac\u00ed \u010dl\u00e1nky. C\u00edlem je, abyste objednali p\u0159esn\u011b to, co konstrukce pot\u0159ebuje.<\/p>\n<p>Srovn\u00e1n\u00ed maj\u00ed smysl tehdy, kdy\u017e dv\u011b varianty spln\u00ed funkci, ale li\u0161\u00ed se v cen\u011b, mont\u00e1\u017ei nebo \u017eivotnosti. U spojovac\u00edho materi\u00e1lu jde nej\u010dast\u011bji o \u010dty\u0159i osy: norma (geometrie a chov\u00e1n\u00ed spoje), materi\u00e1l (korozn\u00ed odolnost), pevnost (\u00fanosnost) a povrchov\u00e1 \u00faprava (ochrana ocelov\u00fdch d\u00edl\u016f). N\u00ed\u017ee jsou tato srovn\u00e1n\u00ed se\u0159azena od nej\u010dast\u011bj\u0161\u00edch dotaz\u016f. Ka\u017ed\u00e1 tabulka shrnuje rozhoduj\u00edc\u00ed rozd\u00edl v n\u011bkolika \u0159\u00e1dc\u00edch, navazuj\u00edc\u00ed \u010dl\u00e1nek pak rozeb\u00edr\u00e1 detaily, v\u00fdjimky a doporu\u010den\u00ed pro konkr\u00e9tn\u00ed aplikace.<\/p>\n<h2>DIN 933 vs DIN 931 (pln\u00fd vs \u010d\u00e1ste\u010dn\u00fd z\u00e1vit)<\/h2>\n<p>Ob\u011b normy popisuj\u00ed \u0161estihrann\u00fd \u0161roub, li\u0161\u00ed se ale d\u00e9lkou z\u00e1vitu. DIN 933 m\u00e1 z\u00e1vit po cel\u00e9 d\u00e9lce d\u0159\u00edku, DIN 931 jen na \u010d\u00e1sti u konce. Pln\u00fd z\u00e1vit d\u00e1v\u00e1 flexibilitu p\u0159i prom\u011bnn\u00e9 tlou\u0161\u0165ce spoje, \u010d\u00e1ste\u010dn\u00fd z\u00e1vit s hladk\u00fdm d\u0159\u00edkem l\u00e9pe p\u0159en\u00e1\u0161\u00ed st\u0159ih a p\u0159esn\u011b l\u00edcuje d\u00edry.<\/p>\n<table>\n<thead>\n<tr>\n<th>Krit\u00e9rium<\/th>\n<th>DIN 933<\/th>\n<th>DIN 931<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Z\u00e1vit<\/td>\n<td>Pln\u00fd (po cel\u00e9 d\u00e9lce)<\/td>\n<td>\u010c\u00e1ste\u010dn\u00fd (d\u0159\u00edk hladk\u00fd)<\/td>\n<\/tr>\n<tr>\n<td>P\u0159enos st\u0159ihu<\/td>\n<td>Z\u00e1vitem<\/td>\n<td>Hladk\u00fdm d\u0159\u00edkem (lep\u0161\u00ed)<\/td>\n<\/tr>\n<tr>\n<td>L\u00edcov\u00e1n\u00ed<\/td>\n<td>Voln\u011bj\u0161\u00ed<\/td>\n<td>P\u0159esn\u011bj\u0161\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li><a href=\"\/blog\/din-933-vs-din-931\/\">Podrobn\u00e9 srovn\u00e1n\u00ed DIN 933 vs DIN 931<\/a><\/li>\n<\/ul>\n<p>Z nab\u00eddky: <a href=\"\/p\/srouby-s-sestihrannou-hlavou-s-drazkou-din-933-a2\/\">DIN 933 A2 pln\u00fd z\u00e1vit<\/a> a <a href=\"\/p\/srouby-se-sestihrannou-hlavou-s-drikem-din-931-a2\/\">DIN 931 A2 \u010d\u00e1ste\u010dn\u00fd z\u00e1vit<\/a>.<\/p>\n<h2>Nerez A2 vs A4 (1.4301 vs 1.4401)<\/h2>\n<p>A2 (1.4301 \/ AISI 304) je standard pro b\u011b\u017en\u00e9 prost\u0159ed\u00ed. A4 (1.4401 \/ AISI 316) p\u0159id\u00e1v\u00e1 molybden a v\u00fdrazn\u011b l\u00e9pe odol\u00e1v\u00e1 chlorid\u016fm. Rozd\u00edl v cen\u011b je vyv\u00e1\u017een \u017eivotnost\u00ed v n\u00e1ro\u010dn\u00fdch podm\u00ednk\u00e1ch &ndash; u mo\u0159e, baz\u00e9n\u016f a chemie se A4 vyplat\u00ed.<\/p>\n<p>Z konstruk\u010dn\u00edho hlediska jsou A2 a A4 prakticky shodn\u00e9 &ndash; maj\u00ed stejnou geometrii, z\u00e1vity i dostupn\u00e9 pevnostn\u00ed t\u0159\u00eddy, tak\u017ee d\u00edl lze pov\u00fd\u0161it z A2 na A4 bez zm\u011bny rozm\u011br\u016f. Rozhoduje tedy v\u00fdhradn\u011b prost\u0159ed\u00ed. Tam, kde by selh\u00e1n\u00ed spoje znamenalo bezpe\u010dnostn\u00ed riziko nebo n\u00e1kladnou demont\u00e1\u017e, je obvykle rozumn\u011bj\u0161\u00ed zaplatit za A4 a z\u00edskat rezervu v korozn\u00ed odolnosti. Naopak v such\u00e9m interi\u00e9ru by A4 byla zbyte\u010dn\u00fdm n\u00e1kladem.<\/p>\n<table>\n<thead>\n<tr>\n<th>Krit\u00e9rium<\/th>\n<th>A2 (1.4301)<\/th>\n<th>A4 (1.4401)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Odolnost chlorid\u016fm<\/td>\n<td>Ni\u017e\u0161\u00ed<\/td>\n<td>Vysok\u00e1 (molybden)<\/td>\n<\/tr>\n<tr>\n<td>Prost\u0159ed\u00ed<\/td>\n<td>Interi\u00e9r, b\u011b\u017en\u00fd exteri\u00e9r<\/td>\n<td>Mo\u0159e, baz\u00e9ny, chemie<\/td>\n<\/tr>\n<tr>\n<td>Cena<\/td>\n<td>Ni\u017e\u0161\u00ed<\/td>\n<td>Vy\u0161\u0161\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li><a href=\"\/blog\/nerez-a2-vs-a4\/\">Podrobn\u00e9 srovn\u00e1n\u00ed nerez A2 vs A4<\/a><\/li>\n<\/ul>\n<p>P\u0159\u00edklad: <a href=\"\/p\/matice-sestihranne-0-8-d-din-934-a4\/\">matice DIN 934 v proveden\u00ed A4<\/a> pro chloridov\u00e9 prost\u0159ed\u00ed.<\/p>\n<h2>T\u0159\u00eddy pevnosti 8.8 vs 10.9 vs 12.9<\/h2>\n<p>Vy\u0161\u0161\u00ed t\u0159\u00edda pevnosti znamen\u00e1 vy\u0161\u0161\u00ed \u00fanosnost, ale obvykle ni\u017e\u0161\u00ed ta\u017enost a vy\u0161\u0161\u00ed citlivost na vod\u00edkov\u00e9 k\u0159ehnut\u00ed u povrchov\u011b upraven\u00fdch d\u00edl\u016f. Pro b\u011b\u017en\u00e9 strojn\u00ed spoje se pou\u017e\u00edv\u00e1 8.8, pro vysoce nam\u00e1han\u00e9 10.9, pro n\u00e1\u0159ad\u00ed a speci\u00e1ln\u00ed aplikace 12.9.<\/p>\n<table>\n<thead>\n<tr>\n<th>T\u0159\u00edda<\/th>\n<th>Rm (MPa)<\/th>\n<th>Typick\u00e9 pou\u017eit\u00ed<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>8.8<\/td>\n<td>800<\/td>\n<td>B\u011b\u017en\u00e9 strojn\u00ed a stavebn\u00ed spoje<\/td>\n<\/tr>\n<tr>\n<td>10.9<\/td>\n<td>1000<\/td>\n<td>Vysoce nam\u00e1han\u00e9 konstrukce<\/td>\n<\/tr>\n<tr>\n<td>12.9<\/td>\n<td>1200<\/td>\n<td>N\u00e1\u0159ad\u00ed, speci\u00e1ln\u00ed spoje<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li><a href=\"\/blog\/trida-pevnosti-8-8\/\">Co znamen\u00e1 8.8<\/a><\/li>\n<li>Srovn\u00e1n\u00ed 10.9 vs 12.9<\/li>\n<\/ul>\n<p>Nap\u0159. <a href=\"\/p\/sroub-m-5-x-65-65-imbus-din-912-a2\/\">imbusov\u00fd \u0161roub DIN 912 v t\u0159\u00edd\u011b 10.9<\/a>.<\/p>\n<h2>Zinkov\u00e1n\u00ed galvanick\u00e9 vs \u017e\u00e1rov\u00e9<\/h2>\n<p>Galvanick\u00e9 (b\u00edl\u00e9) zinkov\u00e1n\u00ed vytv\u00e1\u0159\u00ed tenkou, p\u0159esnou vrstvu vhodnou do interi\u00e9ru a m\u00edrn\u00e9ho exteri\u00e9ru. \u017d\u00e1rov\u00e9 zinkov\u00e1n\u00ed ponorem d\u00e1v\u00e1 silnou, drsn\u011bj\u0161\u00ed vrstvu s mnohon\u00e1sobn\u011b vy\u0161\u0161\u00ed \u017eivotnost\u00ed ve venkovn\u00edm prost\u0159ed\u00ed, ale s hor\u0161\u00ed rozm\u011brovou p\u0159esnost\u00ed z\u00e1vitu.<\/p>\n<p>Praktick\u00fd d\u016fsledek siln\u011bj\u0161\u00ed \u017e\u00e1rov\u00e9 vrstvy je nutnost prota\u017een\u00ed nebo nadm\u011brn\u00e9ho z\u00e1vitu u matic, aby spoj \u0161el sesadit. Pro dlouhodob\u011b exponovan\u00e9 venkovn\u00ed konstrukce je \u017e\u00e1rov\u00fd zinek osv\u011bd\u010den\u00e1 volba; pro p\u0159esn\u00e9 strojn\u00ed spoje v interi\u00e9ru vyhov\u00ed galvanick\u00e9 zinkov\u00e1n\u00ed. Pokud ale prost\u0159ed\u00ed obsahuje chloridy nebo jde o trval\u00fd kontakt s vlhkost\u00ed, \u010dasto je celkov\u011b v\u00fdhodn\u011bj\u0161\u00ed rovnou nerez, kter\u00e1 odpad\u00e1 nutnost \u0159e\u0161it obnovu povrchov\u00e9 ochrany.<\/p>\n<table>\n<thead>\n<tr>\n<th>Krit\u00e9rium<\/th>\n<th>Galvanick\u00e9<\/th>\n<th>\u017d\u00e1rov\u00e9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tlou\u0161\u0165ka vrstvy<\/td>\n<td>5&ndash;15 \u00b5m<\/td>\n<td>45&ndash;85 \u00b5m<\/td>\n<\/tr>\n<tr>\n<td>\u017divotnost (exteri\u00e9r)<\/td>\n<td>Ni\u017e\u0161\u00ed<\/td>\n<td>Vysok\u00e1<\/td>\n<\/tr>\n<tr>\n<td>P\u0159esnost z\u00e1vitu<\/td>\n<td>Vysok\u00e1<\/td>\n<td>Ni\u017e\u0161\u00ed<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li><a href=\"\/blog\/zinkovani-galvanicke-vs-zarove\/\">Podrobn\u00e9 srovn\u00e1n\u00ed zinkov\u00e1n\u00ed<\/a><\/li>\n<\/ul>\n<h2>\u0160estihrann\u00e1 hlava vs imbus (DIN 933 vs DIN 912)<\/h2>\n<p>Volba hlavy ovliv\u0148uje mont\u00e1\u017e i vzhled. \u0160estihrann\u00e1 hlava se utahuje kl\u00ed\u010dem zven\u010d\u00ed a snese vy\u0161\u0161\u00ed moment b\u011b\u017en\u00fdm n\u00e1\u0159ad\u00edm, imbus (vnit\u0159n\u00ed \u0161estihran) umo\u017e\u0148uje mont\u00e1\u017e v zahlouben\u00ed a v omezen\u00e9m prostoru a p\u016fsob\u00ed \u010dist\u0161\u00edm vzhledem. \u0160estihrann\u00e1 hlava je naopak rychlej\u0161\u00ed p\u0159i mont\u00e1\u017ei b\u011b\u017en\u00fdm kl\u00ed\u010dem a l\u00e9pe sn\u00e1\u0161\u00ed zne\u010di\u0161t\u011bn\u00ed; imbus m\u016f\u017ee p\u0159i opot\u0159eben\u00ed nebo zanesen\u00ed ne\u010distotami \u201eprokluzovat\u201c. Pro v\u011bt\u0161inu konstruk\u010dn\u00edch spoj\u016f je rozhoduj\u00edc\u00ed dostupnost n\u00e1stroje a prostor kolem hlavy.<\/p>\n<ul>\n<li>\u0160estihrann\u00e1 hlava vs imbus &ndash; kdy co<\/li>\n<\/ul>\n<h2>Standardn\u00ed vs samojistn\u00e1 matice (DIN 934 vs DIN 985)<\/h2>\n<p>Standardn\u00ed matice DIN 934 je nejlevn\u011bj\u0161\u00ed volbou pro statick\u00e9 spoje. Samojistn\u00e1 matice DIN 985 s plastov\u00fdm krou\u017ekem odol\u00e1v\u00e1 povolen\u00ed vibracemi, je ale jednor\u00e1zov\u00e1 a m\u00e1 teplotn\u00ed limit krou\u017eku (zpravidla do cca 80&ndash;120 \u00b0C podle materi\u00e1lu vlo\u017eky). Pro spoje vystaven\u00e9 chv\u011bn\u00ed &ndash; stroje, dopravn\u00ed technika, ventil\u00e1tory &ndash; je samojistn\u00e1 varianta jasnou volbou; pro statick\u00e9 a snadno p\u0159\u00edstupn\u00e9 spoje, kter\u00e9 lze dotahovat, posta\u010d\u00ed standardn\u00ed DIN 934, p\u0159\u00edpadn\u011b dopln\u011bn\u00e1 pojistnou podlo\u017ekou. P\u0159i v\u00fdb\u011bru v\u017edy ov\u011b\u0159te, \u017ee materi\u00e1l i pevnostn\u00ed t\u0159\u00edda matice odpov\u00eddaj\u00ed \u0161roubu.<\/p>\n<ul>\n<li>Standardn\u00ed vs samojistn\u00e1 matice<\/li>\n<\/ul>\n<h2>Jak srovn\u00e1n\u00ed vyu\u017e\u00edt<\/h2>\n<p>Pokud pot\u0159ebujete pochopit pozad\u00ed norem a materi\u00e1l\u016f, projd\u011bte rozcestn\u00edk <a href=\"\/blog\/normy-a-materialy\/\">Normy a materi\u00e1ly<\/a>. Pro postup v\u00fdb\u011bru od rozm\u011bru po moment slou\u017e\u00ed <a href=\"\/blog\/jak-vybrat-spojovaci-material\/\">Jak vybrat spojovac\u00ed materi\u00e1l<\/a>. V\u0161e skladem Praha a Ostrava, dod\u00e1n\u00ed do 48 hodin.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Srovn\u00e1n\u00ed spojovac\u00edho materi\u00e1lu: DIN 933 vs DIN 931, nerez A2 vs A4, t\u0159\u00eddy pevnosti 8.8\/10.9\/12.9 a galvanick\u00e9 vs \u017e\u00e1rov\u00e9 zinkov\u00e1n\u00ed. Pom\u016f\u017ee s v\u00fdb\u011brem.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_matai_meta_desc":"Srovn\u00e1n\u00ed spojovac\u00edho materi\u00e1lu: DIN 933 vs DIN 931, nerez A2 vs A4, t\u0159\u00eddy pevnosti 8.8\/10.9\/12.9 a galvanick\u00e9 vs \u017e\u00e1rov\u00e9 zinkov\u00e1n\u00ed. Pom\u016f\u017ee s v\u00fdb\u011brem.","_matai_faq":"","_matai_schema_type":"Article","footnotes":""},"class_list":["post-9","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/pages\/9","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/comments?post=9"}],"version-history":[{"count":0,"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/pages\/9\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.matai.cz\/blog\/wp-json\/wp\/v2\/media?parent=9"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}