[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.mpzp.cz\/zavitniky-narex\/#Article","mainEntityOfPage":"https:\/\/www.mpzp.cz\/zavitniky-narex\/","headline":"Z\u00e1vitn\u00edky Narex","name":"Z\u00e1vitn\u00edky Narex","description":"Mnoz\u00ed z v\u00e1s v\u011bd\u00ed, co to z\u00e1vitn\u00edky jsou a k \u010demu slou\u017e\u00ed. Pro ty ostatn\u00ed budou jist\u011b prosp\u011b\u0161n\u00e9 n\u00e1sleduj\u00edc\u00ed informace. Z\u00e1vitn\u00edk je n\u00e1stroj, kter\u00fd slou\u017e\u00ed ke strojn\u00edmu, ale i k ru\u010dn\u00edmu \u0159ez\u00e1n\u00ed vnit\u0159n\u00edch z\u00e1vit\u016f ve v\u00e1lcov\u00e9m otvoru. Jinak \u0159e\u010deno je to n\u00e1stroj, ur\u010den\u00fd pro kovov\u00fdrobu. Krom\u011b vnit\u0159n\u00edch a vn\u011bj\u0161\u00edch, lze vytv\u00e1\u0159et z\u00e1vity prav\u00e9, lev\u00e9, troj\u00faheln\u00edkov\u00e9, […]","datePublished":"2021-07-29","dateModified":"2023-05-24","author":{"@type":"Person","@id":"https:\/\/www.mpzp.cz\/author\/#Person","name":"","url":"https:\/\/www.mpzp.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/9bbe1b3bd68cf5b616cc697a459b86e3be4df6c120806baf939f8aad94b0a3d6?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/9bbe1b3bd68cf5b616cc697a459b86e3be4df6c120806baf939f8aad94b0a3d6?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"mpzp.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.mpzp.cz\/wp-content\/uploads\/screw-1924219_960_720.jpg","url":"https:\/\/www.mpzp.cz\/wp-content\/uploads\/screw-1924219_960_720.jpg","height":0,"width":0},"url":"https:\/\/www.mpzp.cz\/zavitniky-narex\/","about":["N\u00e1kupy"],"wordCount":472,"articleBody":"   Mnoz\u00ed z v\u00e1s v\u011bd\u00ed, co to z\u00e1vitn\u00edky jsou a k \u010demu slou\u017e\u00ed. Pro ty ostatn\u00ed budou jist\u011b prosp\u011b\u0161n\u00e9 n\u00e1sleduj\u00edc\u00ed informace.Z\u00e1vitn\u00edk je n\u00e1stroj, kter\u00fd slou\u017e\u00ed ke strojn\u00edmu, ale i k ru\u010dn\u00edmu \u0159ez\u00e1n\u00ed vnit\u0159n\u00edch z\u00e1vit\u016f ve v\u00e1lcov\u00e9m otvoru. Jinak \u0159e\u010deno je to n\u00e1stroj, ur\u010den\u00fd pro kovov\u00fdrobu. Krom\u011b vnit\u0159n\u00edch a vn\u011bj\u0161\u00edch, lze vytv\u00e1\u0159et z\u00e1vity prav\u00e9, lev\u00e9, troj\u00faheln\u00edkov\u00e9, ku\u017eelov\u00e9, hranat\u00e9, obl\u00e9, lichob\u011b\u017en\u00edkov\u00e9 \u010di v\u00edcechod\u00e9.P\u0159i ru\u010dn\u00edm vytv\u00e1\u0159en\u00ed vnit\u0159n\u00edho z\u00e1vitu se zpravidla pou\u017eije set dvou a\u017e t\u0159\u00ed z\u00e1vitn\u00edk\u016f, je\u017e pomoc\u00ed vratidla vy\u0159\u00edznou \u017e\u00e1dan\u00fd z\u00e1vit. Pt\u00e1te se pro\u010d hned t\u0159i z\u00e1vitn\u00edky? Prvn\u00ed z\u00e1vit pouze p\u0159ed\u0159e\u017ee, druh\u00fd ve vytv\u00e1\u0159en\u00ed z\u00e1vitu pokra\u010duje a t\u0159et\u00ed z\u00e1vitn\u00edk ud\u011bl\u00e1 takzvan\u00fd do\u0159ez materi\u00e1lu a prov\u00e1d\u00ed kalibraci. V pr\u016fmyslov\u00e9 v\u00fdrob\u011b se pou\u017e\u00edv\u00e1 maticov\u00fd nebo strojn\u00ed z\u00e1vitn\u00edk, a ten umo\u017e\u0148uje dokon\u010dit po\u017eadovanou operaci, tedy vytvo\u0159en\u00ed vnit\u0159n\u00edho z\u00e1vitu, bez v\u00fdm\u011bny n\u00e1stroje.Chcete-li \u0159ezat z\u00e1vity vn\u011bj\u0161\u00ed, mus\u00edte pou\u017e\u00edt z\u00e1vitnici (kruhovou z\u00e1vito\u0159eznou matici), anebo z\u00e1vitov\u00e9 o\u010dko. Tyto n\u00e1stroje se upevn\u00ed do r\u016fzn\u011b zkonstruovan\u00fdch vratidel, \u010d\u00edm\u017e se z\u00edsk\u00e1 dostate\u010dn\u00e9 p\u016fsoben\u00ed s\u00edly.A jak takov\u00fd z\u00e1vitn\u00edk vypad\u00e1? Vyroben je z vysoce kalen\u00e9 oceli, aby z\u00edskal pot\u0159ebnou tvrdost \u2013 ocel m\u016f\u017ee b\u00fdt n\u00e1strojov\u00e1 \u010di rychlo\u0159ezn\u00e1. Z\u00e1vitn\u00edky se vyr\u00e1b\u00ed i z tvrdokovu, co\u017e je slinut\u00fd karbid. Maj\u00ed tvar \u0161roubu, na n\u011bm\u017e jsou \u0161roubovit\u00e9 nebo dr\u00e1\u017ekov\u00e9 b\u0159ity.Z\u00e1vitn\u00edky se prod\u00e1vaj\u00ed v r\u016fzn\u00fdch sad\u00e1ch i proveden\u00edch: strojn\u00ed, z\u00e1vito\u0159ezn\u00e9 sady, radi\u00e1ln\u00ed z\u00e1vitov\u00e9 \u010delisti, vratidla, elektrick\u00e9 z\u00e1vito\u0159ezy, z\u00e1vitov\u00e1 o\u010dka, aj.U n\u00e1s jsou nej\u010dast\u011bji pou\u017e\u00edvan\u00e9 z\u00e1vitn\u00edky Narex, \u010desk\u00e9ho v\u00fdrobce profesion\u00e1ln\u00edho n\u00e1\u0159ad\u00ed a n\u00e1stroj\u016f.P\u0159i pr\u00e1ci se z\u00e1vitn\u00edkem, tedy p\u0159i \u0159ez\u00e1n\u00ed z\u00e1vitu, je zapot\u0159eb\u00ed na tento n\u00e1stroj pr\u016fb\u011b\u017en\u011b pou\u017e\u00edvat vhodn\u00e9 mazivo, kter\u00e9 se li\u0161\u00ed podle druhu zpracov\u00e1van\u00e9ho materi\u00e1lu. Nap\u0159\u00edklad p\u0159i vy\u0159ez\u00e1v\u00e1n\u00ed z\u00e1vit\u016f do hlin\u00edku a duralu se pou\u017e\u00edv\u00e1 m\u00fddlov\u00e1 mazivov\u00e1 sm\u011bs, pro \u0159ez\u00e1n\u00ed do oceli zase \u0159epkov\u00fd olej. \u0158e\u017ee-li se do litiny, pou\u017eije se stla\u010den\u00fd vzduch. Je-li pot\u0159eba \u0159ezat z\u00e1vity do trubek, pou\u017e\u00edvaj\u00ed se velk\u00e9 z\u00e1vitov\u00e9 n\u00e1stroje s d\u011blen\u00fdmi no\u017ei, anebo soustruhy.                                                                                                                                                                                                                                                                                                                                                                                          4.2\/5 - (12 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Z\u00e1vitn\u00edky Narex","item":"https:\/\/www.mpzp.cz\/zavitniky-narex\/#breadcrumbitem"}]}]