[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.nejedeto.cz\/narex-vyrabi-zavitniky-mnoho-desitek-let\/#Article","mainEntityOfPage":"https:\/\/www.nejedeto.cz\/narex-vyrabi-zavitniky-mnoho-desitek-let\/","headline":"Narex vyr\u00e1b\u00ed z\u00e1vitn\u00edky mnoho des\u00edtek let","name":"Narex vyr\u00e1b\u00ed z\u00e1vitn\u00edky mnoho des\u00edtek let","description":"Stroj\u00edrensk\u00e1 v\u00fdroba se neobejde bez speci\u00e1ln\u00edch n\u00e1stroj\u016f, kam pat\u0159\u00ed i z\u00e1vitn\u00edky. Chyst\u00e1te-li se po\u0159\u00eddit z\u00e1vitn\u00edk, m\u011bli byste zn\u00e1t jeho z\u00e1kladn\u00ed parametry. P\u0159edev\u0161\u00edm, jak\u00fd z\u00e1vit pot\u0159ebujete vyrobit, zda vnit\u0159n\u00ed nebo vn\u011bj\u0161\u00ed, a jak\u00fd typ z\u00e1vitu to bude. Rozli\u0161ujeme p\u0159edev\u0161\u00edm z\u00e1vity prav\u00e9 a lev\u00e9, tedy jin\u00fdmi slovy pravoto\u010div\u00e9 a levoto\u010div\u00e9. Pak je nutn\u00e9 zn\u00e1t typ, nej\u010dast\u011bji jde […]","datePublished":"2021-05-07","dateModified":"2023-05-02","author":{"@type":"Person","@id":"https:\/\/www.nejedeto.cz\/author\/#Person","name":"","url":"https:\/\/www.nejedeto.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":"nejedeto.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.nejedeto.cz\/wp-content\/uploads\/%C5%99ez%C3%A1n%C3%AD%20z%C3%A1vitu.JPG","url":"https:\/\/www.nejedeto.cz\/wp-content\/uploads\/%C5%99ez%C3%A1n%C3%AD%20z%C3%A1vitu.JPG","height":0,"width":0},"url":"https:\/\/www.nejedeto.cz\/narex-vyrabi-zavitniky-mnoho-desitek-let\/","about":["V\u00fdrobky"],"wordCount":423,"articleBody":"        Stroj\u00edrensk\u00e1 v\u00fdroba se neobejde bez speci\u00e1ln\u00edch n\u00e1stroj\u016f, kam pat\u0159\u00ed i z\u00e1vitn\u00edky. Chyst\u00e1te-li se po\u0159\u00eddit z\u00e1vitn\u00edk, m\u011bli byste zn\u00e1t jeho z\u00e1kladn\u00ed parametry. P\u0159edev\u0161\u00edm, jak\u00fd z\u00e1vit pot\u0159ebujete vyrobit, zda vnit\u0159n\u00ed nebo vn\u011bj\u0161\u00ed, a jak\u00fd typ z\u00e1vitu to bude.  Rozli\u0161ujeme p\u0159edev\u0161\u00edm z\u00e1vity prav\u00e9 a lev\u00e9, tedy jin\u00fdmi slovy pravoto\u010div\u00e9 a levoto\u010div\u00e9. Pak je nutn\u00e9 zn\u00e1t typ, nej\u010dast\u011bji jde o z\u00e1vit metrick\u00fd, ozna\u010dovan\u00fd p\u00edsmenem M, m\u00e9n\u011b \u010dasto se vyu\u017e\u00edv\u00e1 z\u00e1vit Whitworth\u016fv (p\u00edsmeno W). Existuj\u00ed tak\u00e9 z\u00e1vity trubkov\u00e9, obl\u00e9, trap\u00e9zov\u00e9 \u010di panc\u00e9\u0159ov\u00e9. Na z\u00e1v\u011br se budete rozhodovat, jak\u00e9 pr\u016fm\u011bry z\u00e1vitn\u00edk\u016f v\u00e1s zaj\u00edmaj\u00ed, a zda p\u016fjde o z\u00e1kladn\u00ed stoup\u00e1n\u00ed, nebo bude jemn\u00e9. Ve\u0161ker\u00e9 informace o t\u011bchto technick\u00fdch parametrech naleznete v p\u0159\u00edslu\u0161n\u00fdch \u010d\u00e1stech strojnick\u00fdch tabulek a p\u0159edepsan\u00fdch norem.  Co by v\u00e1s d\u00e1le m\u011blo zaj\u00edmat  Rychlo\u0159ezn\u00e1 ocel nebo n\u00e1strojov\u00e1 \u2013 z t\u011bchto dvou materi\u00e1l\u016f se z\u00e1vitn\u00edky vyr\u00e1b\u00ed, a jestli\u017ee si je po\u0159izujete, m\u011bli byste zn\u00e1t z\u00e1sadn\u00ed rozd\u00edly mezi nimi. Tak tedy rychlo\u0159ezn\u00e1 ocel je materi\u00e1l kvalitn\u011bj\u0161\u00ed, vykazuje v\u011bt\u0161\u00ed tvrdost i pevnostn\u00ed charakteristiky a vyu\u017e\u00edv\u00e1 se hlavn\u011b pro strojn\u00ed z\u00e1vitn\u00edky a obr\u00e1b\u011bn\u00ed kov\u016f ve velkos\u00e9riov\u00e9 v\u00fdrob\u011b. Naopak Narex z\u00e1vitn\u00edky z oceli n\u00e1strojov\u00e9 jsou ur\u010deny pro ru\u010dn\u00ed, p\u0159ev\u00e1\u017en\u011b mal\u00e9 s\u00e9rie obrobk\u016f. K ru\u010dn\u00edm z\u00e1vitn\u00edk\u016fm a z\u00e1vitov\u00fdm o\u010dk\u016fm je zapot\u0159eb\u00ed tak\u00e9 up\u00ednac\u00ed vratidlo a pro hlubok\u00e9 pr\u016fchoz\u00ed i nepr\u016fchoz\u00ed otvory se vyu\u017e\u00edvaj\u00ed n\u00e1stavce, aby n\u00e1stroj pro\u0161el v cel\u00e9 d\u00e9lce obrobkem. \u010c\u00edm se z\u00e1vitn\u00edky ma\u017eou \u2013 mo\u017en\u00e1 v\u00e1s napadne, \u017ee p\u0159i obr\u00e1b\u011bn\u00ed kov\u016f se \u010dasto vyu\u017e\u00edv\u00e1 emulze, tedy sm\u011bs oleje s vodou, ale u \u0159ez\u00e1n\u00ed z\u00e1vit\u016f, a\u0165 u\u017e se jedn\u00e1 o ru\u010dn\u00ed nebo strojn\u00ed zp\u016fsob, se vyu\u017e\u00edv\u00e1 pouze speci\u00e1ln\u00ed \u0159ezn\u00fd olej. Je to nutn\u00e9 pro zachov\u00e1n\u00ed velmi jemn\u00e9ho stoup\u00e1n\u00ed z\u00e1vit\u016f, aby nedoch\u00e1zelo k jejich poru\u0161en\u00ed, a z\u00e1rove\u0148 se t\u00edm urychluje pracovn\u00ed postup a prodlu\u017euje \u017eivotnost z\u00e1vitn\u00edk\u016f \u010di z\u00e1vito\u0159ezn\u00fdch hlav.                                                                                                                                                                                                                                                                                                                                                                                          5\/5 - (1 vote)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Narex vyr\u00e1b\u00ed z\u00e1vitn\u00edky mnoho des\u00edtek let","item":"https:\/\/www.nejedeto.cz\/narex-vyrabi-zavitniky-mnoho-desitek-let\/#breadcrumbitem"}]}]