{"id":3692,"date":"2021-01-21T10:44:23","date_gmt":"2021-01-21T09:44:23","guid":{"rendered":"https:\/\/www.redhillballs.com\/?page_id=3692"},"modified":"2025-09-25T16:00:57","modified_gmt":"2025-09-25T14:00:57","slug":"rodillos-de-agujas-nra","status":"publish","type":"page","link":"https:\/\/www.redhillballs.com\/es\/productos\/rodillos-cilindricos-y-de-agujas\/rodillos-de-agujas-nra\/","title":{"rendered":"Rodillos de agujas NRA"},"content":{"rendered":"<h2>\ud83d\udee0\ufe0f <a href=\"https:\/\/en.wikipedia.org\/wiki\/Needle_roller_bearing?utm_source=chatgpt.com\">Rodillos de agujas NRA con extremos esf\u00e9ricos \u2013 Rodillos con extremos redondeados para conjuntos compactos y de alta carga<\/a><\/h2>\n<p>Los rodillos de agujas NRA con extremos esf\u00e9ricos son elementos con puntas redondeadas usados en jaulas de precisi\u00f3n y conjuntos de rodamientos de agujas, donde son cr\u00edticos las altas cargas radiales, el bajo rozamiento y un tama\u00f1o compacto. Las puntas esf\u00e9ricas (redondeadas) reducen las tensiones en los bordes y ayudan a distribuir el lubricante, favoreciendo un funcionamiento suave y una larga vida \u00fatil en cajas de cambios, transmisiones, movimiento lineal y otros sistemas de control de movimiento.<\/p>\n<h3>\ud83d\udd27 Especificaciones t\u00e9cnicas clave<\/h3>\n<ul>\n<li><strong>Geometr\u00eda de los extremos<\/strong>: NRA = extremos esf\u00e9ricos\/redondeados para mejor distribuci\u00f3n de carga y flujo de lubricante frente a extremos planos.<\/li>\n<li><strong>Normas<\/strong>: Fabricados seg\u00fan DIN 5402-3 \/ ISO 3096 (clases dimensionales y de precisi\u00f3n).<\/li>\n<li><strong>Materiales<\/strong>: Acero para rodamientos al cromo 100Cr6 (AISI 52100); opciones inoxidables (AISI 420C\/440C) y cer\u00e1micas\/carburo t\u00e9cnicas bajo pedido.<\/li>\n<li><strong>Dureza (AISI 52100)<\/strong>: ~60\u201366 HRC tras tratamiento t\u00e9rmico.<\/li>\n<li><strong>Dimensiones t\u00edpicas<\/strong>: Di\u00e1metro Dw \u2248 1,0\u20136,0 mm; longitud Lw \u2248 5,8\u201359,8 mm (otros tama\u00f1os seg\u00fan plano).<\/li>\n<li><strong>Tolerancias t\u00edpicas<\/strong>: Di\u00e1metro 0\/\u221210 \u00b5m; grados de precisi\u00f3n G2, G3, G5 (seg\u00fan ISO 3096\/DIN 5402-3).<\/li>\n<\/ul>\n<h3>\u2705 Ventajas<\/h3>\n<ul>\n<li><strong>Alta capacidad radial<\/strong> con secci\u00f3n m\u00ednima para dise\u00f1os compactos.<\/li>\n<li><strong>Menor tensi\u00f3n de borde y lubricaci\u00f3n m\u00e1s uniforme<\/strong> gracias a los extremos esf\u00e9ricos (mayor fiabilidad bajo desalineaci\u00f3n).<\/li>\n<li><strong>Calidad superficial<\/strong> y clasificaci\u00f3n estrecha de tolerancias que permiten bajo rozamiento y descentramiento constante.<\/li>\n<li><strong>Versatilidad de materiales<\/strong> para requisitos de desgaste, corrosi\u00f3n o temperatura.<\/li>\n<\/ul>\n<h3>\ud83d\udd04 Aplicaciones t\u00edpicas de los rodillos de agujas NRA con extremos esf\u00e9ricos<\/h3>\n<ul>\n<li><strong>Jaulas de agujas y conjuntos de rodamientos<\/strong> en reductores, trenes planetarios y engranajes arm\u00f3nicos.<\/li>\n<li><strong>Transmisiones automotrices<\/strong> y subconjuntos compactos del tren motriz.<\/li>\n<li><strong>Gu\u00edas lineales<\/strong>, m\u00e1quinas-herramienta, micromotores y sistemas de movimiento.<\/li>\n<\/ul>\n<h3>\ud83d\udce6 Grados y tama\u00f1os disponibles<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>Grados<\/strong>: G2\u2013G5 (seg\u00fan DIN 5402-3 \/ ISO 3096); selecciones especiales bajo pedido.<\/li>\n<li><a href=\"https:\/\/www.redhillballs.com\/company\/ball-diameters\/\"><strong>Rango de di\u00e1metros<\/strong><\/a>: ~1,0\u20136,0 mm (tipo NRA); <strong>Longitudes<\/strong>: ~5,8\u201359,8 mm.<\/li>\n<li><strong>Tipos<\/strong>: NRA (extremos esf\u00e9ricos)<\/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 Rodillos de agujas NRA con extremos esf\u00e9ricos \u2013 Rodillos con extremos redondeados para conjuntos compactos y de alta carga Los rodillos de agujas NRA con extremos esf\u00e9ricos son elementos con puntas redondeadas usados en jaulas de precisi\u00f3n y conjuntos de rodamientos de agujas, donde son cr\u00edticos las altas cargas radiales, el bajo rozamiento y [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6979,"parent":3690,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3692","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>Rodillos de agujas NRA \u2013 capacidad y precisi\u00f3n<\/title>\n<meta name=\"description\" content=\"Rodillos de agujas NRA ofrecen alta capacidad de carga, precisi\u00f3n y resistencia al desgaste para aplicaciones industriales exigentes.\" \/>\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.redhillballs.com\/es\/productos\/rodillos-cilindricos-y-de-agujas\/rodillos-de-agujas-nra\/\" \/>\n<meta property=\"og:locale\" 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