{"id":10023,"date":"2025-05-13T02:12:49","date_gmt":"2025-05-13T02:12:49","guid":{"rendered":"https:\/\/www.skf-eu.com\/?post_type=product&#038;p=10023"},"modified":"2025-05-13T02:13:10","modified_gmt":"2025-05-13T02:13:10","slug":"needle-roller-bearings","status":"publish","type":"product","link":"https:\/\/www.skf-eu.com\/it\/prodotto\/needle-roller-bearings\/","title":{"rendered":"Cuscinetti a rullini"},"content":{"rendered":"<p>I cuscinetti a rullini sono un tipo di cuscinetto di precisione che utilizza sottili rullini come elementi volventi. Sono una suddivisione dei cuscinetti volventi. I loro vantaggi principali sono la struttura leggera e l'eccellente capacit\u00e0 di carico radiale, particolarmente adatti a condizioni di lavoro con spazio di installazione limitato ma carichi elevati.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-10028 aligncenter\" data-src=\"https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/05\/Needle-Roller-Bearings-2-1.webp\" alt=\"Needle Roller Bearings\" width=\"430\" height=\"320\" srcset=\"https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/05\/Needle-Roller-Bearings-2-1.webp 430w, https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/05\/Needle-Roller-Bearings-2-1-300x223.webp 300w, https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/05\/Needle-Roller-Bearings-2-1-16x12.webp 16w\" sizes=\"(max-width: 430px) 100vw, 430px\" \/><\/p>\n<h2>Composizione e caratteristiche dei cuscinetti a rullini<\/h2>\n<p>I cuscinetti a rullini sono generalmente composti da un anello interno, un anello esterno, un rullino e una gabbia. Il rullo a rullini ha un diametro pi\u00f9 piccolo e un rapporto d'aspetto significativamente pi\u00f9 alto rispetto ai rulli ordinari o alle sfere d'acciaio, in modo da fornire un supporto di carico pi\u00f9 forte nello stesso spazio e ridurre il peso complessivo.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-10029 aligncenter\" data-src=\"https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/05\/IKO-Needle-Roller-Bearings.webp\" alt=\"Needle Roller Bearings\" width=\"700\" height=\"240\" srcset=\"https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/05\/IKO-Needle-Roller-Bearings.webp 700w, https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/05\/IKO-Needle-Roller-Bearings-480x165.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 700px, 100vw\" \/><\/p>\n<h2>Parametri tecnici di riferimento del modello tipico<\/h2>\n<table class=\"tg\" style=\"border-collapse: collapse; border-spacing: 0;\">\n<thead>\n<tr>\n<th style=\"font-family: Arial, sans-serif; font-size: 14px; font-weight: bold; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">Modello<\/th>\n<th style=\"font-family: Arial, sans-serif; font-size: 14px; font-weight: bold; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">Diametro interno (mm)<\/th>\n<th style=\"font-family: Arial, sans-serif; font-size: 14px; font-weight: bold; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">Diametro esterno (mm)<\/th>\n<th style=\"font-family: Arial, sans-serif; font-size: 14px; font-weight: bold; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">Spessore (mm)<\/th>\n<th style=\"font-family: Arial, sans-serif; font-size: 14px; font-weight: bold; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">Carico dinamico nominale (N)<\/th>\n<th style=\"font-family: Arial, sans-serif; font-size: 14px; font-weight: bold; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">Velocit\u00e0 limite (giri\/min)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">NA4900<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">10<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">22<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">13<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">980<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">12,000<\/td>\n<\/tr>\n<tr>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">NA4902<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">15<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">24<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">13<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">1,200<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">10,000<\/td>\n<\/tr>\n<tr>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">NKI12\/16<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">12<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">19<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">16<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">1,350<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">9,000<\/td>\n<\/tr>\n<tr>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">NKX30<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">30<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">42<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">22<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">4,500<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">7,000<\/td>\n<\/tr>\n<tr>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">RNA4902<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">15<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">24<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">14<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">1,150<\/td>\n<td style=\"font-family: Arial, sans-serif; font-size: 14px; overflow: hidden; padding: 10px 5px; text-align: left; vertical-align: top; word-break: normal; border: 1px solid black;\">10,500<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Marchi comuni:<\/h2>\n<p><a href=\"https:\/\/www.skf-eu.com\/product\/needle-roller-bearings\/\"><strong>Cuscinetti a rullini SKF<\/strong><\/a><br \/>\nCuscinetti a rullini NSK<br \/>\nCuscinetti a rullini KOYO<br \/>\nCuscinetti a rullini FAG<br \/>\nCuscinetti a rullini INA<br \/>\nCuscinetti a rullini TIMKEN<br \/>\nCuscinetti a rullini NACHI<\/p>\n<h2>Tipi e applicazioni dei cuscinetti a rullini<\/h2>\n<p><strong>1. Cuscinetti a rullini a una corona<\/strong><br \/>\nScenari applicabili: cambi automobilistici, alberi di trasmissione di motocicli e altre parti che richiedono velocit\u00e0 e carichi elevati.<\/p>\n<p>Vantaggi: Struttura semplificata, risposta dinamica rapida, adatta a condizioni di avvio e arresto frequenti.<\/p>\n<p><strong>2. Cuscinetti a rullini a due corone<\/strong><br \/>\nScenari applicabili: apparecchiature ad alto carico, come le piattaforme girevoli dei macchinari ingegneristici e i sistemi di sospensione dei veicoli pesanti.<\/p>\n<p>Vantaggi: Il design a due corone di rullini migliora notevolmente la capacit\u00e0 dei cuscinetti radiali e ha una migliore resistenza agli urti.<\/p>\n<p><strong>3. Cuscinetti a rullini con anello esterno integrato<\/strong><br \/>\nScenari di applicazione: riduttori industriali, guide di macchine utensili e altre occasioni in cui \u00e8 necessario aumentare la rigidit\u00e0.<\/p>\n<p>Vantaggi: L'anello esterno rafforza la struttura complessiva ed \u00e8 adatto ad ambienti di carico complessi.<\/p>\n<p><strong>4. Cuscinetti a rullini senza anelli esterni<\/strong><br \/>\nScenari applicabili: motori di aerei, strumenti di precisione e altri settori che richiedono una rigorosa precisione di installazione.<\/p>\n<p>Vantaggi: Utilizzare direttamente le parti meccaniche come piste di scorrimento per risparmiare al massimo lo spazio.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-10031 aligncenter\" data-src=\"https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/05\/Needle-Roller-Bearings-1-1.webp\" alt=\"Needle Roller Bearings\" width=\"784\" height=\"230\" srcset=\"https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/05\/Needle-Roller-Bearings-1-1.webp 784w, https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/05\/Needle-Roller-Bearings-1-1-480x141.webp 480w\" sizes=\"(min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 784px, 100vw\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-10030\" data-src=\"https:\/\/www.skf-eu.com\/wp-content\/uploads\/2025\/05\/Needle-Roller-Bearings-3-1.webp\" alt=\"Needle Roller Bearings\" width=\"784\" height=\"314\" \/><\/p>\n<h2>Domande frequenti<\/h2>\n<p>Q1: Qual \u00e8 la competitivit\u00e0 di base dei cuscinetti a rullini?<br \/>\nR: Pu\u00f2 supportare carichi elevati in uno spazio limitato e presenta caratteristiche di leggerezza e basso attrito, superiori alla capacit\u00e0 di carico radiale dei cuscinetti a sfera tradizionali.<\/p>\n<p>Q2: Come distinguere i cuscinetti a rullini dai cuscinetti a rulli cilindrici?<\/p>\n<p>R: Il rapporto d'aspetto dei corpi volventi dei cuscinetti a rullini \u00e8 maggiore ed \u00e8 adatto a spazi ridotti; i cuscinetti a rulli cilindrici sono pi\u00f9 adatti all'equilibrio tra carichi e velocit\u00e0 medie.<\/p>\n<p>D3: Quali sono le misure chiave per migliorare la durata dei cuscinetti a rullini?<\/p>\n<p>R: Sostituire regolarmente i lubrificanti, controllare la temperatura di esercizio, evitare il sovraccarico e garantire la coassialit\u00e0 dell'albero e della sede del cuscinetto durante l'installazione.<\/p>\n<p>D4: Quali sono gli effetti dei fattori ambientali sulla performance?<\/p>\n<p>R: Le temperature estreme o i fluidi corrosivi accelerano i guasti della lubrificazione e sono necessari materiali speciali (come l'acciaio inossidabile) o design di tenuta per far fronte alle condizioni difficili.<\/p>\n<p>Q5: Il rumore di funzionamento \u00e8 elevato?<\/p>\n<p>R: A causa delle caratteristiche del contatto di linea, il rumore \u00e8 leggermente superiore a quello dei cuscinetti a sfera a contatto puntiforme. I rumori anomali sono per lo pi\u00f9 causati da una scarsa lubrificazione o dall'usura dei componenti, che devono essere controllati in tempo.<\/p>\n<h2>Conclusione<\/h2>\n<p>I cuscinetti a rullini sono la scelta ideale per le condizioni di lavoro in cui lo spazio \u00e8 limitato, grazie alla distribuzione del carico ad alta densit\u00e0 e al design compatto. Una selezione ragionevole (fila singola\/doppia, con anello esterno\/senza anello esterno) e una manutenzione standardizzata possono ottimizzare in modo significativo le prestazioni e la durata, soddisfacendo le diverse esigenze, dai macchinari civili alle apparecchiature industriali di fascia alta.<\/p>\n<p>Si prega di consultare il nostro <a href=\"https:\/\/www.skf-eu.com\/category\/roller-bearings\/\"><strong>Cuscinetti a rulli<\/strong><\/a> Catalogo per altri prodotti!<\/p>","protected":false},"excerpt":{"rendered":"<h3>Caratteristiche principali:<\/h3>\n<p>Elevata capacit\u00e0 di carico<br \/>\nStruttura compatta<br \/>\nLeggero<br \/>\nDesign a basso attrito<\/p>\n<h3>Vantaggi principali<\/h3>\n<p>Efficienza di spazio: A parit\u00e0 di carico, il volume \u00e8 inferiore di 30%~50% rispetto a quello dei cuscinetti a sfera.<br \/>\nEconomia: Semplificare la struttura di supporto e ridurre il costo complessivo dell'apparecchiatura.<br \/>\nAdattabilit\u00e0: Le varianti opzionali, come le guarnizioni, l'assenza di anello esterno o i rulli a rullini a pieno riempimento, consentono di far fronte a condizioni di lavoro complesse.<\/p>","protected":false},"featured_media":10024,"template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_cat":[240],"product_tag":[293],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - 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