[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.plackarna.cz\/zavitniky-narex-pro-strojni-i-rucni-obrabeni-kovu\/#Article","mainEntityOfPage":"https:\/\/www.plackarna.cz\/zavitniky-narex-pro-strojni-i-rucni-obrabeni-kovu\/","headline":"Z\u00e1vitn\u00edky Narex pro strojn\u00ed i ru\u010dn\u00ed obr\u00e1b\u011bn\u00ed kov\u016f","name":"Z\u00e1vitn\u00edky Narex pro strojn\u00ed i ru\u010dn\u00ed obr\u00e1b\u011bn\u00ed kov\u016f","description":"Stroj\u00edrenstv\u00ed m\u00e1 v \u010cesk\u00e9 republice velmi hlubok\u00e9 ko\u0159eny a firma Narex nen\u00ed nezn\u00e1m\u00e1 t\u00e9m\u011b\u0159 \u017e\u00e1dn\u00e9mu kutilovi a pochopiteln\u011b ani zku\u0161en\u00e9mu \u0159emesln\u00edkovi. Z\u00e1vitn\u00edky Narex se u n\u00e1s vyr\u00e1b\u00ed ji\u017e des\u00edtky let, slou\u017e\u00ed pro ru\u010dn\u00ed i strojn\u00ed obr\u00e1b\u011bn\u00ed kovov\u00fdch materi\u00e1l\u016f. Ru\u010dn\u00ed z\u00e1vitn\u00edky (sada) \u2013 pat\u0159ily a st\u00e1le pat\u0159\u00ed do z\u00e1kladn\u00ed v\u00fdbavy dom\u00e1c\u00ed d\u00edlny a ka\u017ed\u00e9ho z\u00e1me\u010dn\u00edka. T\u00edmto […]","datePublished":"2021-01-23","dateModified":"2021-01-23","author":{"@type":"Person","@id":"https:\/\/www.plackarna.cz\/author\/#Person","name":"","url":"https:\/\/www.plackarna.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/0c4621640b5c0734669aeb181ef77969b528487727344f28e734a206566ea0f1?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/0c4621640b5c0734669aeb181ef77969b528487727344f28e734a206566ea0f1?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"plackarna.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.plackarna.cz\/wp-content\/uploads\/strojn%C3%AD%20z%C3%A1vitn%C3%ADk_2.jpg","url":"https:\/\/www.plackarna.cz\/wp-content\/uploads\/strojn%C3%AD%20z%C3%A1vitn%C3%ADk_2.jpg","height":0,"width":0},"url":"https:\/\/www.plackarna.cz\/zavitniky-narex-pro-strojni-i-rucni-obrabeni-kovu\/","about":["Hobby"],"wordCount":433,"articleBody":"   Stroj\u00edrenstv\u00ed m\u00e1 v \u010cesk\u00e9 republice velmi hlubok\u00e9 ko\u0159eny a firma Narex nen\u00ed nezn\u00e1m\u00e1 t\u00e9m\u011b\u0159 \u017e\u00e1dn\u00e9mu kutilovi a pochopiteln\u011b ani zku\u0161en\u00e9mu \u0159emesln\u00edkovi. Z\u00e1vitn\u00edky Narex se u n\u00e1s vyr\u00e1b\u00ed ji\u017e des\u00edtky let, slou\u017e\u00ed pro ru\u010dn\u00ed i strojn\u00ed obr\u00e1b\u011bn\u00ed kovov\u00fdch materi\u00e1l\u016f.Ru\u010dn\u00ed z\u00e1vitn\u00edky (sada) \u2013 pat\u0159ily a st\u00e1le pat\u0159\u00ed do z\u00e1kladn\u00ed v\u00fdbavy dom\u00e1c\u00ed d\u00edlny a ka\u017ed\u00e9ho z\u00e1me\u010dn\u00edka. T\u00edmto zp\u016fsobem se \u0159e\u017eou z\u00e1vity v p\u0159edvrtan\u00e9m otvoru tak, \u017ee se z\u00e1vitn\u00edk upne do vratidla, mus\u00ed b\u00fdt v kolm\u00e9 poloze v\u016f\u010di otvoru. Sady obsahuj\u00ed dva nebo t\u0159i z\u00e1vitn\u00edky pro stejn\u00fd typ z\u00e1vitu a ty se tak\u00e9 postupn\u011b nasazuj\u00ed do pr\u00e1ce v p\u0159esn\u00e9m po\u0159ad\u00ed \u2013 jako prvn\u00ed p\u0159ed\u0159ez\u00e1vac\u00ed, druh\u00fd \u0159ezac\u00ed a t\u0159et\u00ed do\u0159ez\u00e1vac\u00ed.Druhy z\u00e1vitn\u00edk\u016f dle typu \u2013 nej\u010dast\u011bji se pou\u017e\u00edv\u00e1 z\u00e1vit metrick\u00fd, ozna\u010den\u00fd p\u00edsmenem M. K dal\u0161\u00edm typ\u016fm pat\u0159\u00ed Whitworth\u016fw (W), UNC, UNF, panc\u00e9\u0159ov\u00fd (P) a trubkov\u00fd (G).Maticov\u00e9 z\u00e1vitn\u00edky \u2013 ru\u010dn\u00ed z\u00e1vitn\u00edky v sad\u011b se vyu\u017e\u00edvaj\u00ed pro pr\u016fchoz\u00ed i slep\u00e9 otvory, zat\u00edmco maticov\u00e9 jsou konstruov\u00e1ny pouze pro otvory pr\u016fchoz\u00ed. Jejich \u0159ezn\u00e1 \u010d\u00e1st je uzp\u016fsobena tak, \u017ee se z\u00e1vit pro\u0159\u00edzne jen jedn\u00edm n\u00e1strojem. Maticov\u00fd z\u00e1vitn\u00edk je vhodn\u00fd i pro strojn\u00ed obr\u00e1b\u011bn\u00ed.Nepr\u016fchoz\u00ed otvory \u2013 zde je nejv\u011bt\u0161\u00edm probl\u00e9mem odvod t\u0159\u00edsek, zat\u00edmco u pr\u016fchoz\u00edch d\u011br vysta\u010d\u00edte s rovn\u00fdmi dr\u00e1\u017ekami, nepr\u016fchoz\u00ed vy\u017eaduj\u00ed dr\u00e1\u017eku vyrobenou ve \u0161roubovici.Vn\u011bj\u0161\u00ed z\u00e1vity \u2013 se zhotovuj\u00ed pomoc\u00ed kruhov\u00e9 z\u00e1vitov\u00e9 \u0159ezac\u00ed \u010delisti. Ta se bu\u010f up\u00edn\u00e1 do strojn\u00edho skl\u00ed\u010didla pro strojn\u00ed \u0159ez\u00e1n\u00ed, anebo p\u0159i ru\u010dn\u00edm zp\u016fsobu do vratidla. \u010celist je pro dan\u00fd pr\u016fm\u011br a typ z\u00e1vitu jen jedna (nen\u00ed v sad\u00e1ch) a m\u016f\u017ee b\u00fdt, stejn\u011b jako u vnit\u0159n\u00edch z\u00e1vitn\u00edk\u016f, pro prav\u00fd a lev\u00fd z\u00e1vit.\u010c\u00edm chladit \u2013 chlazen\u00ed materi\u00e1lu a \u0159ezn\u00e9ho n\u00e1stroje je podstatnou sou\u010d\u00e1st\u00ed procesu obr\u00e1b\u011bn\u00ed. U slitin hlin\u00edku se osv\u011bd\u010dil technick\u00fd l\u00edh, u oceli olej nebo olejov\u00e1 emulze. Maziva se vyu\u017e\u00edvaj\u00ed jak u strojn\u00edho, tak i ru\u010dn\u00edho \u0159ez\u00e1n\u00ed a plat\u00ed to pro v\u0161echny typy a pr\u016fm\u011bry z\u00e1vit\u016f.                                                                                                                                                                                                                                                                                                                                                                                          3.3\/5 - (3 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Z\u00e1vitn\u00edky Narex pro strojn\u00ed i ru\u010dn\u00ed obr\u00e1b\u011bn\u00ed kov\u016f","item":"https:\/\/www.plackarna.cz\/zavitniky-narex-pro-strojni-i-rucni-obrabeni-kovu\/#breadcrumbitem"}]}]