[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.zuul.cz\/jak-dobre-znate-protahovaci-trn\/#Article","mainEntityOfPage":"https:\/\/www.zuul.cz\/jak-dobre-znate-protahovaci-trn\/","headline":"Jak dob\u0159e zn\u00e1te protahovac\u00ed trn","name":"Jak dob\u0159e zn\u00e1te protahovac\u00ed trn","description":"\u0158\u00edk\u00e1 v\u00e1m n\u011bco v\u00fdraz \u201eprotahovac\u00ed trn\u201c? Napov\u00edme v\u00e1m, \u017ee se jedn\u00e1 o stroj\u00edrensk\u00fd obr\u00e1b\u011bc\u00ed n\u00e1stroj, tedy nikoli n\u011bjak\u00fd trn z r\u016f\u017eov\u00e9ho ke\u0159e, kter\u00fd se na Slunci protahuje do d\u00e9lky nebo tak n\u011bco. Protahovac\u00ed trny pat\u0159\u00ed ve stroj\u00edrensk\u00e9 v\u00fdrob\u011b k d\u016fle\u017eit\u00fdm n\u00e1stroj\u016fm, nach\u00e1z\u00ed uplatn\u011bn\u00ed v s\u00e9riov\u00e9 produkci vzhledem k tomu, \u017ee jsou to pom\u011brn\u011b drah\u00e9 n\u00e1stroje, […]","datePublished":"2025-05-04","dateModified":"2025-05-04","author":{"@type":"Person","@id":"https:\/\/www.zuul.cz\/author\/devene\/#Person","name":"devene","url":"https:\/\/www.zuul.cz\/author\/devene\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/dcb1aeb5e7d95014cdc92e76cf3c72f6b456579bf773ad0081803a6569ffc19c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/dcb1aeb5e7d95014cdc92e76cf3c72f6b456579bf773ad0081803a6569ffc19c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"zuul.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.zuul.cz\/wp-content\/uploads\/locksmith-4521067_640_1.jpg","url":"https:\/\/www.zuul.cz\/wp-content\/uploads\/locksmith-4521067_640_1.jpg","height":0,"width":0},"url":"https:\/\/www.zuul.cz\/jak-dobre-znate-protahovaci-trn\/","about":["Produkty"],"wordCount":410,"articleBody":"           \u0158\u00edk\u00e1 v\u00e1m n\u011bco v\u00fdraz \u201eprotahovac\u00ed trn\u201c? Napov\u00edme v\u00e1m, \u017ee se jedn\u00e1 o stroj\u00edrensk\u00fd obr\u00e1b\u011bc\u00ed n\u00e1stroj, tedy nikoli n\u011bjak\u00fd trn z r\u016f\u017eov\u00e9ho ke\u0159e, kter\u00fd se na Slunci protahuje do d\u00e9lky nebo tak n\u011bco. Protahovac\u00ed trny pat\u0159\u00ed ve stroj\u00edrensk\u00e9 v\u00fdrob\u011b k d\u016fle\u017eit\u00fdm n\u00e1stroj\u016fm, nach\u00e1z\u00ed uplatn\u011bn\u00ed v s\u00e9riov\u00e9 produkci vzhledem k tomu, \u017ee jsou to pom\u011brn\u011b drah\u00e9 n\u00e1stroje, aby se jejich po\u0159izovac\u00ed cena tak\u00e9 zaplatila. Protahovac\u00ed trny se vyu\u017e\u00edvaj\u00ed pro zhotoven\u00ed otvor\u016f slo\u017eit\u00fdch tvar\u016f, kter\u00e9 by bylo obt\u00ed\u017en\u00e9 vyrobit jin\u00fdm zp\u016fsobem, nap\u0159\u00edklad vrt\u00e1n\u00edm, vyhrubov\u00e1n\u00edm a vystru\u017eov\u00e1n\u00edm nebo soustru\u017een\u00edm. Jedn\u00edm z p\u0159\u00edklad\u016f pou\u017eit\u00ed \u201eprotahov\u00e1k\u016f\u201c jsou vlo\u017eky do dve\u0159n\u00edch z\u00e1mk\u016f.  Ano, je to tak, protahov\u00e1ky skute\u010dn\u011b slou\u017e\u00ed pro v\u00fdrobu patentn\u00edch tzv. cylindrick\u00fdch z\u00e1mk\u016f do dve\u0159\u00ed, a kdy\u017e se na takovou vlo\u017eku do z\u00e1mku zahled\u00edte pozorn\u011b, v\u0161imnete si, jak slo\u017eit\u00fd vnit\u0159n\u00ed tvar otvoru se tu nach\u00e1z\u00ed, p\u0159itom je to v\u011bc naprosto b\u011b\u017en\u00e1 a st\u011b\u017e\u00ed si um\u00edme p\u0159edstavit, \u017ee bychom uzamyk\u00e1n\u00ed dve\u0159\u00ed \u0159e\u0161ili jinak, t\u0159eba postaru klasick\u00fdm dozick\u00fdm z\u00e1mkem.  A jak takov\u00fd protahovac\u00ed trn vlastn\u011b vypad\u00e1? M\u016f\u017eeme si jej p\u0159edstavit jako tenkou dlouhou ty\u010d opat\u0159enou \u0159ezn\u00fdmi zuby, kde ka\u017ed\u00fd zub odeb\u00edr\u00e1 z obrobku t\u0159\u00edsku. Zuby jsou uspo\u0159\u00e1d\u00e1ny v \u0159ad\u011b za sebou tak, aby ka\u017ed\u00fd z nich odebral jen \u010d\u00e1st materi\u00e1lu, a ten posledn\u00ed zub dokon\u010dil fin\u00e1ln\u00ed \u0159eznou operaci. S protahovac\u00edmi trny se vyr\u00e1b\u00ed cel\u00e1 \u0159ada r\u016fzn\u00fdch slo\u017eit\u00fdch otvor\u016f, osov\u011b soum\u011brn\u00fdch i nesoum\u011brn\u00fdch s mnoha geometrick\u00fdmi tvary. Nap\u0159\u00edklad pokud pot\u0159ebujete vyrobit otvor ve tvaru sedmi\u00faheln\u00edku, dvan\u00e1ctic\u00edp\u00e9 hv\u011bzdy, p\u016flm\u011bs\u00edce apod. Z\u00e1sadn\u00ed roli zde ov\u0161em hraje ekonomick\u00fd ukazatel, kdy je nutn\u00e9 vyv\u00e1\u017eit cenu n\u00e1stroje po\u010dtem vyroben\u00fdch kus\u016f obrobk\u016f, co\u017e je v p\u0159\u00edpad\u011b takov\u00fdch patentn\u00edch z\u00e1mk\u016f vcelku dob\u0159e zaji\u0161t\u011bno. Mus\u00edte zkr\u00e1tka st\u00e1le po\u010d\u00edtat s t\u00edm, \u017ee protahovac\u00ed trn je velmi sv\u00e9r\u00e1zn\u00fd n\u00e1stroj, jeho\u017e v\u00fdrobn\u00ed cena nebude nejni\u017e\u0161\u00ed.                                                                                                                                                                                                                                                                                                                                                                                           4.4\/5 - (7 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Jak dob\u0159e zn\u00e1te protahovac\u00ed trn","item":"https:\/\/www.zuul.cz\/jak-dobre-znate-protahovaci-trn\/#breadcrumbitem"}]}]