{"id":807,"date":"2025-01-06T03:24:37","date_gmt":"2025-01-06T03:24:37","guid":{"rendered":"https:\/\/www.ylfastener.com\/?p=807"},"modified":"2025-01-06T03:25:25","modified_gmt":"2025-01-06T03:25:25","slug":"what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads","status":"publish","type":"post","link":"https:\/\/www.ylfastener.com\/hr\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/","title":{"rendered":"Koja je razlika izme\u0111u vijka s valjanim navojem i onog s narezanim navojem?"},"content":{"rendered":"

Navoji mehani\u010dkog pri\u010dvr\u0161\u0107iva\u010da, bez obzira radi li se o\u00a0vijak s glavom<\/u>,\u00a0\u0161tap<\/u>, ili\u00a0du\u0107an unutra<\/u>, mo\u017ee se proizvesti rezanjem ili valjanjem. Dolje su opisane razlike, zablude, prednosti i nedostaci svake metode.<\/p>\n

Namotane niti<\/b><\/strong><\/h3>\n

Narezivanje navoja je proces kojim se \u010delik ekstrudira kako bi se formirao navojni dio spojnog elementa, umjesto da se uklanja kao kod narezivanja navoja. U ovom procesu, vijak se proizvodi od okrugle \u0161ipke smanjenog promjera. Na primjer, vijak promjera 1\u2033 proizveden je od okrugle \u0161ipke promjera 0,912\u2033. Ovaj \"promjer promjera\" materijala je otprilike sredi\u0161nja to\u010dka izme\u0111u velikog promjera (vrhovi) i manjeg promjera (doline) navoja. Vijak se \"valja\" kroz set matrica za navoje koji pomi\u010du \u010delik i oblikuju navoje. Krajnji rezultat je zatvara\u010d s punim navojnim dijelom promjera 1 in\u010da, ali smanjenim promjerom tijela (.912). Urezivanje navoja u roli iznimno je u\u010dinkovit postupak i \u010desto rezultira zna\u010dajnim u\u0161tedama. Stoga \u0107e Portland Bolt namotavati navoje kad god je to mogu\u0107e.<\/p>\n

 <\/p>\n

Tehni\u010dki gledano, sve specifikacije s iznimkom konstrukcijskih vijaka A325 i A490 mogu se proizvesti sa smanjenim tijelom i valjanim navojima.<\/p>\n

 <\/p>\n

Vijak sa smanjenim tijelom bit \u0107e slabiji od vijka s punim tijelom.<\/p>\n

Najslabije podru\u010dje bilo kojeg mehani\u010dkog zatvara\u010da je mali promjer navoja. Budu\u0107i da su dimenzije navoja rezanog navoja i stezaljke za valjani navoj identi\u010dne, nema apsolutno nikakve razlike u \u010dvrsto\u0107i. Moglo bi se zapravo tvrditi da otvrdnjavanje koje se doga\u0111a tijekom procesa urezivanja navoja mo\u017ee \u010dak i oja\u010dati spojni element s valjanim navojem. Osim toga, narezivanje navoja prekida prirodnu zrnastu strukturu okrugle \u0161ipke, dok je narezivanje valjkastih navoja reformira. Netko bi opet mogao tvrditi da rezanje u zrno okrugle \u0161ipke prilikom rezanja navoja mo\u017ee proizvesti navoje koji imaju manji strukturni integritet od dijela koji je narezan na kotrljaju\u0107e navoje.<\/p>\n

Prednosti narezivanja valjaka<\/i><\/em><\/p>\n

    \n
  1. Zna\u010dajno kra\u0107e vrijeme rada zna\u010di ni\u017ee tro\u0161kove.<\/li>\n
  2. Budu\u0107i da vijak s navojem u roli ima manji promjer tijela, te\u017ei manje od svog punog tijela. Ovo smanjenje te\u017eine smanjuje tro\u0161kove \u010delika, pocin\u010davanja, toplinske obrade, galvaniziranja, prijevoza i sve druge tro\u0161kove povezane sa zatvara\u010dem koji se temelje na te\u017eini.<\/li>\n
  3. Hladna obrada \u010dini niti otpornijima na o\u0161te\u0107enja tijekom rukovanja.<\/li>\n
  4. Valjani navoji \u010desto su glatkiji zbog u\u010dinka gla\u010danja kod operacije valjanja.<\/li>\n<\/ol>\n

    \u00a0<\/i><\/em><\/p>\n

    Nedostaci narezivanja valjaka<\/i><\/em><\/p>\n

      \n
    1. Dostupnost okrugle \u0161ipke promjera koraka ograni\u010dena je za odre\u0111ene vrste materijala.<\/li>\n<\/ol>\n

      \u00a0<\/i><\/em><\/p>\n

      \u00a0<\/i><\/em><\/p>\n

      Cut Threads<\/b><\/strong><\/h3>\n

      Rezanje navoja je postupak kojim se \u010delik izrezuje ili fizi\u010dki uklanja iz okrugle \u010deli\u010dne \u0161ipke kako bi se oblikovali navoji. Vijak promjera 1\u2033, na primjer, proizvodi se rezanjem navoja u cijelo tijelo vijka promjera 1\u2033.<\/p>\n

      Prednosti rezanja navoja<\/i><\/em><\/p>\n

        \n
      1. Nekoliko ograni\u010denja u pogledu promjera i duljine navoja.<\/li>\n
      2. Sve specifikacije mogu se proizvesti s rezanim navojem.<\/li>\n<\/ol>\n

         <\/p>\n

        Nedostaci rezanja navoja<\/i><\/em><\/p>\n

        Znatno du\u017ee vrijeme rada zna\u010di ve\u0107e tro\u0161kove.<\/p>","protected":false},"excerpt":{"rendered":"

        Threads of a mechanical fastener, regardless of whether it is a\u00a0headed bolt,\u00a0rod, or\u00a0bent bolt, can be produced by either cutting or rolling. The differences, misconceptions, advantages, and disadvantages of each method are described below. Rolled Threads Roll threading is a process by which steel is extruded to form the threaded portion of a fastener, instead [\u2026]<\/p>","protected":false},"author":1,"featured_media":335,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6],"tags":[],"class_list":["post-807","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical"],"acf":[],"yoast_head":"\nWhat is the difference between a bolt with rolled threads and one with cut threads? - HANDAN YANLANG FASTENER CO., LTD<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ylfastener.com\/hr\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/\" \/>\n<meta property=\"og:locale\" content=\"hr_HR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is the difference between a bolt with rolled threads and one with cut threads? - HANDAN YANLANG FASTENER CO., LTD\" \/>\n<meta property=\"og:description\" content=\"Threads of a mechanical fastener, regardless of whether it is a\u00a0headed bolt,\u00a0rod, or\u00a0bent bolt, can be produced by either cutting or rolling. The differences, misconceptions, advantages, and disadvantages of each method are described below. Rolled Threads Roll threading is a process by which steel is extruded to form the threaded portion of a fastener, instead […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ylfastener.com\/hr\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/\" \/>\n<meta property=\"og:site_name\" content=\"HANDAN YANLANG FASTENER CO., LTD\" \/>\n<meta property=\"article:published_time\" content=\"2025-01-06T03:24:37+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-01-06T03:25:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ylfastener.com\/wp-content\/uploads\/2024\/12\/20230220165201267.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"437\" \/>\n\t<meta property=\"og:image:height\" content=\"245\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisao\/la\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Procijenjeno vrijeme \u010ditanja\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.ylfastener.com\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.ylfastener.com\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\/\/www.ylfastener.com\/#\/schema\/person\/6c326a47e95f6824b65a22ff33f53a9c\"},\"headline\":\"What is the difference between a bolt with rolled threads and one with cut threads?\",\"datePublished\":\"2025-01-06T03:24:37+00:00\",\"dateModified\":\"2025-01-06T03:25:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.ylfastener.com\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/\"},\"wordCount\":502,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.ylfastener.com\/#organization\"},\"articleSection\":[\"Technical\"],\"inLanguage\":\"hr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.ylfastener.com\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.ylfastener.com\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/\",\"url\":\"https:\/\/www.ylfastener.com\/what-is-the-difference-between-a-bolt-with-rolled-threads-and-one-with-cut-threads\/\",\"name\":\"What is the difference between a bolt with rolled threads and one with cut threads? 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