{"id":1563,"date":"2021-01-20T10:25:11","date_gmt":"2021-01-20T09:25:11","guid":{"rendered":"https:\/\/www.redhillballs.com\/?page_id=1563"},"modified":"2025-10-01T10:16:32","modified_gmt":"2025-10-01T08:16:32","slug":"jehlicky-se-zaoblenymi-konci-nra","status":"publish","type":"page","link":"https:\/\/www.redhillballs.com\/cs\/produkty\/valecky-a-jehlicky\/jehlicky-se-zaoblenymi-konci-nra\/","title":{"rendered":"Jehli\u010dky se zaoblen\u00fdmi konci NRA"},"content":{"rendered":"<h2>\ud83d\udee0\ufe0f <a href=\"https:\/\/en.wikipedia.org\/wiki\/Needle_roller_bearing?utm_source=chatgpt.com\">Jehli\u010dky se zaoblen\u00fdmi konci NRA \u2013 pro kompaktn\u00ed sestavy s vysok\u00fdm zat\u00ed\u017een\u00edm<\/a><\/h2>\n<p>Jehli\u010dky se zaoblen\u00fdmi konci NRA jsou jehlov\u00e9 prvky se zaoblen\u00fdmi konci pou\u017e\u00edvan\u00e9 v p\u0159esn\u00fdch klec\u00edch a sestav\u00e1ch jehlov\u00fdch lo\u017eisek, kde jsou kl\u00ed\u010dov\u00e9 vysok\u00e9 radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed, n\u00edzk\u00e9 t\u0159en\u00ed a kompaktn\u00ed z\u00e1stavba. Kulov\u00e9 (zaoblen\u00e9) konce sni\u017euj\u00ed okrajov\u00e1 nap\u011bt\u00ed a napom\u00e1haj\u00ed rozvodu maziva, co\u017e podporuje plynul\u00fd chod a dlouhou \u017eivotnost v p\u0159evodovk\u00e1ch, transmis\u00edch, line\u00e1rn\u00edch veden\u00edch a dal\u0161\u00edch syst\u00e9mech \u0159\u00edzen\u00ed pohybu.<\/p>\n<h3>\ud83d\udd27 Kl\u00ed\u010dov\u00e9 technick\u00e9 specifikace<\/h3>\n<ul>\n<li><strong>Geometrie konc\u016f<\/strong>: NRA = kulov\u00e9\/zaoblen\u00e9 konce pro lep\u0161\u00ed rozlo\u017een\u00ed zat\u00ed\u017een\u00ed a tok maziva oproti ploch\u00fdm konc\u016fm.<\/li>\n<li><strong>Normy<\/strong>: V\u00fdroba dle DIN 5402-3 \/ ISO 3096 (rozm\u011brov\u00e9 a p\u0159esnostn\u00ed t\u0159\u00eddy).<\/li>\n<li><strong>Materi\u00e1ly<\/strong>: Lo\u017eiskov\u00e1 chromov\u00e1 ocel 100Cr6 (AISI 52100); nerezov\u00e9 varianty (AISI 420C\/440C) a technick\u00e1 keramika\/karbid na vy\u017e\u00e1d\u00e1n\u00ed.<\/li>\n<li><strong>Tvrdost (AISI 52100)<\/strong>: ~60\u201366 HRC po tepeln\u00e9 \u00faprav\u011b.<\/li>\n<li><strong>Typick\u00e9 rozm\u011bry<\/strong>: Pr\u016fm\u011br Dw \u2248 1,0\u20136,0 mm; d\u00e9lka Lw \u2248 5,8\u201359,8 mm (jin\u00e9 velikosti dle v\u00fdkresu).<\/li>\n<li><strong>Typick\u00e9 tolerance<\/strong>: Pr\u016fm\u011br 0\/\u221210 \u00b5m; p\u0159esnostn\u00ed t\u0159\u00eddy G2, G3, G5 (dle ISO 3096\/DIN 5402-3).<\/li>\n<\/ul>\n<h3>\u2705 V\u00fdhody<\/h3>\n<ul>\n<li><strong>Vysok\u00e1 radi\u00e1ln\u00ed nosnost<\/strong> p\u0159i minim\u00e1ln\u00edm pr\u016f\u0159ezu pro kompaktn\u00ed konstrukce.<\/li>\n<li><strong>Sn\u00ed\u017een\u00e9 okrajov\u00e9 nap\u011bt\u00ed a lep\u0161\u00ed maz\u00e1n\u00ed<\/strong> d\u00edky kulov\u00fdm konc\u016fm (vy\u0161\u0161\u00ed spolehlivost p\u0159i nesouososti).<\/li>\n<li><strong>Kvalita povrchu<\/strong> a \u00fazk\u00e9 t\u0159\u00edd\u011bn\u00ed toleranc\u00ed umo\u017e\u0148uj\u00ed n\u00edzk\u00e9 t\u0159en\u00ed a konzistentn\u00ed h\u00e1zen\u00ed.<\/li>\n<li><strong>Materi\u00e1lov\u00e1 variabilita<\/strong> pro po\u017eadavky na opot\u0159eben\u00ed, korozi \u010di teplotu.<\/li>\n<\/ul>\n<h3>\ud83d\udd04 Typick\u00e9 aplikace pro Jehli\u010dky se zaoblen\u00fdmi konci NRA<\/h3>\n<ul>\n<li><strong>Jehlov\u00e9 klece a lo\u017eiskov\u00e9 sestavy<\/strong> v p\u0159evodovk\u00e1ch, planetov\u00fdch a harmonick\u00fdch p\u0159evodech.<\/li>\n<li><strong>Automobilov\u00e9 p\u0159evodovky<\/strong> a kompaktn\u00ed podsestavy pohonn\u00fdch \u00fastroj\u00ed.<\/li>\n<li><strong>Line\u00e1rn\u00ed veden\u00ed<\/strong>, obr\u00e1b\u011bc\u00ed stroje, mal\u00e9 motory a pohybov\u00e9 syst\u00e9my.<\/li>\n<\/ul>\n<h3>\ud83d\udce6 Dostupn\u00e9 t\u0159\u00eddy a velikosti<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>T\u0159\u00eddy<\/strong>: G2\u2013G5 (dle DIN 5402-3 \/ ISO 3096); speci\u00e1ln\u00ed t\u0159\u00edd\u011bn\u00ed na vy\u017e\u00e1d\u00e1n\u00ed.<\/li>\n<li><a href=\"https:\/\/www.redhillballs.com\/company\/ball-diameters\/\"><strong>Rozsah pr\u016fm\u011br\u016f<\/strong><\/a>: ~1,0\u20136,0 mm (typ NRA); <strong>D\u00e9lky<\/strong>: ~5,8\u201359,8 mm.<\/li>\n<li><strong>Typy<\/strong>: NRA (kulov\u00e9 konce)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-252\" src=\"https:\/\/www.redhillballs.com\/wp-content\/uploads\/2021\/01\/needle-roller-nra-spherical-ends.jpg\" alt=\"\" width=\"400\" height=\"196\" srcset=\"https:\/\/www.redhillballs.com\/wp-content\/uploads\/2021\/01\/needle-roller-nra-spherical-ends.jpg 400w, https:\/\/www.redhillballs.com\/wp-content\/uploads\/2021\/01\/needle-roller-nra-spherical-ends-300x147.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udee0\ufe0f Jehli\u010dky se zaoblen\u00fdmi konci NRA \u2013 pro kompaktn\u00ed sestavy s vysok\u00fdm zat\u00ed\u017een\u00edm Jehli\u010dky se zaoblen\u00fdmi konci NRA jsou jehlov\u00e9 prvky se zaoblen\u00fdmi konci pou\u017e\u00edvan\u00e9 v p\u0159esn\u00fdch klec\u00edch a sestav\u00e1ch jehlov\u00fdch lo\u017eisek, kde jsou kl\u00ed\u010dov\u00e9 vysok\u00e9 radi\u00e1ln\u00ed zat\u00ed\u017een\u00ed, n\u00edzk\u00e9 t\u0159en\u00ed a kompaktn\u00ed z\u00e1stavba. Kulov\u00e9 (zaoblen\u00e9) konce sni\u017euj\u00ed okrajov\u00e1 nap\u011bt\u00ed a napom\u00e1haj\u00ed rozvodu maziva, co\u017e podporuje [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6970,"parent":1561,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1563","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Jehli\u010dky se zaoblen\u00fdmi konci NRA \u2013 p\u0159esn\u00e9 a odoln\u00e9<\/title>\n<meta name=\"description\" content=\"Jehli\u010dky se zaoblen\u00fdmi konci NRA z lo\u017eiskov\u00e9 oceli nab\u00edzej\u00ed vysokou p\u0159esnost, tvrdost a dlouhou \u017eivotnost pro n\u00e1ro\u010dn\u00e9 mechanick\u00e9 aplikace.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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