{"id":2013,"date":"2026-07-27T22:17:19","date_gmt":"2026-07-28T02:17:19","guid":{"rendered":"https:\/\/slecotech.com\/?p=2013"},"modified":"2026-07-27T22:42:33","modified_gmt":"2026-07-28T02:42:33","slug":"single-shaft-vs-double-shaft-shredder-which-one-do-you-need","status":"publish","type":"post","link":"https:\/\/slecotech.com\/fr\/single-shaft-vs-double-shaft-shredder-which-one-do-you-need\/","title":{"rendered":"Broyeur \u00e0 arbre unique ou \u00e0 double arbre : lequel vous convient le mieux ?"},"content":{"rendered":"<p>A <strong>Broyeur \u00e0 arbre unique<\/strong> d\u00e9coupe le mat\u00e9riau \u00e0 l'aide d'un rotor contre un tamis afin de produire des flocons uniformes, tandis qu'un <strong>D\u00e9chiqueteur \u00e0 double arbre<\/strong> d\u00e9chire la mati\u00e8re entre deux arbres tournant en sens inverse pour une r\u00e9duction grossi\u00e8re du volume. Le choix d\u2019un mod\u00e8le inadapt\u00e9 entra\u00eene l\u2019endommagement des lames, un faible d\u00e9bit ou une granulom\u00e9trie de sortie incompatible avec les \u00e9quipements en aval. Cet article compare les broyeurs \u00e0 arbre unique et \u00e0 double arbre en fonction de la granulom\u00e9trie de sortie, de l\u2019ad\u00e9quation aux mat\u00e9riaux, de la tol\u00e9rance d\u2019alimentation, des co\u00fbts de maintenance et de la consommation d\u2019\u00e9nergie \u2014 et explique pourquoi le syst\u00e8me d\u2019alimentation est tout aussi important que le nombre d\u2019arbres.<\/p>\n<h2>Qu'est-ce qu'un broyeur \u00e0 arbre unique ?<\/h2>\n<p>Un broyeur \u00e0 arbre unique utilise un rotor \u00e9quip\u00e9 de couteaux de coupe indexables qui cisaillent les mat\u00e9riaux contre des contre-couteaux fixes. Un tamis situ\u00e9 en dessous contr\u00f4le la taille des particules en sortie : les mat\u00e9riaux ne peuvent sortir qu\u2019apr\u00e8s avoir franchi les mailles du tamis, ce qui permet d\u2019obtenir des flocons d\u2019une taille d\u00e9finie, g\u00e9n\u00e9ralement comprise entre 20 et 80 mm.<\/p>\n<p>Un v\u00e9rin hydraulique ou un bras oscillant presse la mati\u00e8re contre le rotor. Gr\u00e2ce \u00e0 cette conception, les broyeurs \u00e0 arbre unique sont parfaits pour les applications o\u00f9 la taille des particules en sortie doit \u00eatre constante, comme l'alimentation de lignes de lavage, de granulateurs ou d'extrudeuses.<\/p>\n<h3>Mat\u00e9riaux g\u00e9n\u00e9ralement trait\u00e9s<\/h3>\n<ul>\n<li>Amas de purge de plastique et d\u00e9p\u00f4ts de d\u00e9marrage<\/li>\n<li>Tubes et profil\u00e9s (HDPE, PVC, PP)<\/li>\n<li>Rouleaux de film et de non-tiss\u00e9<\/li>\n<li>Caisses, f\u00fbts et palettes<\/li>\n<li>D\u00e9chets rigides d'origine post-industrielle<\/li>\n<li>Canaux d'injection et canaux de distribution<\/li>\n<\/ul>\n<h3>Param\u00e8tres techniques types<\/h3>\n<table>\n<tr>\n<th>Param\u00e8tre<\/th>\n<th>Plage typique<\/th>\n<\/tr>\n<tr>\n<td>Vitesse du rotor<\/td>\n<td>60 \u00e0 150 tr\/min<\/td>\n<\/tr>\n<tr>\n<td>Puissance du moteur<\/td>\n<td>22\u2013160 kW<\/td>\n<\/tr>\n<tr>\n<td>Taille de la sortie<\/td>\n<td>20 \u00e0 80 mm (d\u00e9finis par l'\u00e9cran)<\/td>\n<\/tr>\n<tr>\n<td>D\u00e9bit<\/td>\n<td>300 \u00e0 3 000 kg\/h<\/td>\n<\/tr>\n<tr>\n<td>Type de couteau<\/td>\n<td>Plaquettes indexables (rotatives 4\u00d7)<\/td>\n<\/tr>\n<\/table>\n<h2>Qu'est-ce qu'un broyeur \u00e0 double arbre ?<\/h2>\n<p>Un broyeur \u00e0 double arbre est \u00e9quip\u00e9 de deux arbres tournant lentement, munis de lames crochues imbriqu\u00e9es qui saisissent et d\u00e9chiquettent les mat\u00e9riaux entre elles. Il ne comporte g\u00e9n\u00e9ralement pas de tamis : la taille des morceaux obtenus est d\u00e9termin\u00e9e par la largeur des lames et se pr\u00e9sente sous forme de lambeaux grossiers et irr\u00e9guliers, mesurant g\u00e9n\u00e9ralement entre 50 et 200 mm.<\/p>\n<p>Les arbres s'alimentent automatiquement en saisissant les mat\u00e9riaux, ce qui rend inutile l'utilisation d'un poussoir ou d'un v\u00e9rin. Leur conception \u00e0 faible vitesse et \u00e0 couple \u00e9lev\u00e9 leur permet de supporter la pr\u00e9sence de salet\u00e9s, de cailloux et de fragments m\u00e9talliques accidentels qui endommageraient un rotor \u00e0 arbre unique. C'est pourquoi les broyeurs \u00e0 double arbre constituent le choix privil\u00e9gi\u00e9 pour les flux de d\u00e9chets sales, volumineux ou mixtes.<\/p>\n<h3>Mat\u00e9riaux g\u00e9n\u00e9ralement trait\u00e9s<\/h3>\n<ul>\n<li>Balles mixtes issues de d\u00e9chets post-consommation<\/li>\n<li>D\u00e9chets encombrants et meubles<\/li>\n<li>Pneus et produits en caoutchouc<\/li>\n<li>D\u00e9chets d'\u00e9quipements \u00e9lectriques et \u00e9lectroniques (DEEE)<\/li>\n<li>Ferraille et profil\u00e9s en aluminium<\/li>\n<li>D\u00e9chets municipaux solides (DMS)<\/li>\n<li>D\u00e9chets textiles et de tissus<\/li>\n<\/ul>\n<h3>Param\u00e8tres techniques types<\/h3>\n<table>\n<tr>\n<th>Param\u00e8tre<\/th>\n<th>Plage typique<\/th>\n<\/tr>\n<tr>\n<td>Vitesse de l'arbre<\/td>\n<td>10 \u00e0 40 tr\/min<\/td>\n<\/tr>\n<tr>\n<td>Puissance du moteur<\/td>\n<td>15\u2013110 kW \u00d7 2<\/td>\n<\/tr>\n<tr>\n<td>Taille de la sortie<\/td>\n<td>50 \u00e0 200+ mm (selon la fraise)<\/td>\n<\/tr>\n<tr>\n<td>D\u00e9bit<\/td>\n<td>500 \u00e0 10 000 kg\/h<\/td>\n<\/tr>\n<tr>\n<td>Type de coupeur<\/td>\n<td>Cisailles \u00e0 crochet (r\u00e9paration par soudure ou remplacement)<\/td>\n<\/tr>\n<\/table>\n<h2>Broyeurs \u00e0 arbre unique et \u00e0 double arbre : principales diff\u00e9rences<\/h2>\n<table>\n<tr>\n<th>Comparaison<\/th>\n<th>Broyeur \u00e0 arbre unique<\/th>\n<th>D\u00e9chiqueteur \u00e0 double arbre<\/th>\n<\/tr>\n<tr>\n<td>M\u00e9thode de travail<\/td>\n<td>D\u00e9coupe sur un \u00e9cran<\/td>\n<td>D\u00e9chirure entre deux arbres<\/td>\n<\/tr>\n<tr>\n<td>Taille de la sortie<\/td>\n<td>20 \u00e0 80 mm, uniforme<\/td>\n<td>50 \u00e0 200+ mm, irr\u00e9gulier<\/td>\n<\/tr>\n<tr>\n<td>Application de sortie<\/td>\n<td>Envoyer directement vers la ligne de lavage ou le broyeur<\/td>\n<td>Pr\u00e9-broyage ; n\u00e9cessite une deuxi\u00e8me \u00e9tape<\/td>\n<\/tr>\n<tr>\n<td>Tol\u00e9rance alimentaire<\/td>\n<td>N\u00e9cessite une alimentation relativement saine<\/td>\n<td>Tol\u00e9rant envers les impuret\u00e9s, les m\u00e9taux et les d\u00e9chets mixtes<\/td>\n<\/tr>\n<tr>\n<td>Vitesse de l'arbre<\/td>\n<td>60 \u00e0 150 tr\/min<\/td>\n<td>10 \u00e0 40 tr\/min<\/td>\n<\/tr>\n<tr>\n<td>Mode d'alimentation<\/td>\n<td>V\u00e9rin hydraulique ou bras oscillant<\/td>\n<td>Arbres \u00e0 alimentation automatique<\/td>\n<\/tr>\n<tr>\n<td>Niveau sonore<\/td>\n<td>Mod\u00e9r\u00e9<\/td>\n<td>Inf\u00e9rieur<\/td>\n<\/tr>\n<tr>\n<td>Entretien des couteaux<\/td>\n<td>Plaquettes indexables, rotation 4\u00d7<\/td>\n<td>R\u00e9parer par soudure ou remplacer les lames<\/td>\n<\/tr>\n<tr>\n<td>\u00c9nergie par tonne<\/td>\n<td>Mod\u00e9r\u00e9<\/td>\n<td>Plus faible (mais un deuxi\u00e8me \u00e9tage peut \u00eatre n\u00e9cessaire)<\/td>\n<\/tr>\n<tr>\n<td>Id\u00e9al pour<\/td>\n<td>Flocons calibr\u00e9s destin\u00e9s \u00e0 la transformation en aval<\/td>\n<td>R\u00e9duction grossi\u00e8re du volume des mati\u00e8res premi\u00e8res r\u00e9sistantes<\/td>\n<\/tr>\n<\/table>\n<h2>Comment fonctionne un broyeur \u00e0 arbre unique ?<\/h2>\n<h3>D\u00e9roulement du processus<\/h3>\n<ol>\n<li><strong>Chargement des mat\u00e9riaux :<\/strong> Le mat\u00e9riau est charg\u00e9 dans la tr\u00e9mie.<\/li>\n<li><strong>Alimentation hydraulique :<\/strong> Un v\u00e9rin ou un bras oscillant presse le mat\u00e9riau contre le rotor \u00e0 une pression contr\u00f4l\u00e9e.<\/li>\n<li><strong>D\u00e9coupe :<\/strong> Le rotor tourne \u00e0 une vitesse comprise entre 60 et 150 tr\/min. Des couteaux indexables d\u00e9coupent le mat\u00e9riau contre des contre-couteaux fixes.<\/li>\n<li><strong>Projection :<\/strong> Les morceaux d\u00e9coup\u00e9s passent \u00e0 travers un tamis situ\u00e9 en dessous. Les morceaux trop gros restent dans la chambre pour \u00eatre d\u00e9coup\u00e9s davantage.<\/li>\n<li><strong>D\u00e9charge :<\/strong> Des flocons de taille uniforme sortent de la machine, pr\u00eats \u00e0 \u00eatre lav\u00e9s, granul\u00e9s ou extrud\u00e9s.<\/li>\n<\/ol>\n<h3>Pourquoi le syst\u00e8me d'alimentation est-il important ?<\/h3>\n<p>Deux broyeurs \u00e0 arbre unique \u00e9quip\u00e9s de rotors identiques peuvent pr\u00e9senter un \u00e9cart de 50% en termes de d\u00e9bit r\u00e9el \u2014 et cette diff\u00e9rence tient au syst\u00e8me d'alimentation :<\/p>\n<ul>\n<li><strong>Piston horizontal :<\/strong> Un poussoir hydraulique achemine la mati\u00e8re lat\u00e9ralement vers le rotor. Ce syst\u00e8me fonctionne bien avec des mati\u00e8res denses et en morceaux. Les mati\u00e8res l\u00e9g\u00e8res ou souples (rouleaux de film, pi\u00e8ces creuses) peuvent flotter au-dessus du rotor.<\/li>\n<li><strong>V\u00e9rin de bras oscillant :<\/strong> Un bras mont\u00e9 sur pivot appuie le mat\u00e9riau sur le rotor par le haut. Les mat\u00e9riaux l\u00e9gers ne peuvent pas flotter, les pi\u00e8ces creuses ne peuvent pas rebondir. Id\u00e9al pour les films, les d\u00e9chets de big-bags et les formes vari\u00e9es.<\/li>\n<li><strong>Alimentation par gravit\u00e9 :<\/strong> Les mat\u00e9riaux tombent sur le rotor. Ce syst\u00e8me est simple et peu co\u00fbteux, mais peu fiable pour les d\u00e9chets volumineux ou souples.<\/li>\n<\/ul>\n<h2>Comment fonctionne un broyeur \u00e0 double arbre ?<\/h2>\n<h3>D\u00e9roulement du processus<\/h3>\n<ol>\n<li><strong>Chargement des mat\u00e9riaux :<\/strong> Le mat\u00e9riau est charg\u00e9 dans la tr\u00e9mie.<\/li>\n<li><strong>Alimentation automatique :<\/strong> Des arbres tournant en sens inverse saisissent le mat\u00e9riau et le tirent vers l'int\u00e9rieur sans recourir \u00e0 un piston.<\/li>\n<li><strong>D\u00e9chirure :<\/strong> Les lames en forme de crochet situ\u00e9es sur chaque arbre s'engr\u00e8nent \u00e0 une vitesse de 10 \u00e0 40 tr\/min, d\u00e9chiquetant le mat\u00e9riau en larges bandes.<\/li>\n<li><strong>D\u00e9charge :<\/strong> Des morceaux d\u00e9chiquet\u00e9s de forme irr\u00e9guli\u00e8re sortent par le dessous. Aucun tamis ne vient entraver le flux.<\/li>\n<li><strong>Protection contre les surcharges :<\/strong> La fonction \u00ab Auto-reverse \u00bb \u00e9limine automatiquement les bourrages, puis reprend la rotation normale.<\/li>\n<\/ol>\n<h2>Quand opter pour un broyeur \u00e0 arbre unique ?<\/h2>\n<p>Optez pour un broyeur \u00e0 arbre unique lorsque <strong>la taille de la sortie a son importance<\/strong>. Si les mat\u00e9riaux broy\u00e9s sont achemin\u00e9s vers une ligne de lavage, un granulateur ou une extrudeuse, les flocons d\u00e9finis par le tamis d\u2019une machine \u00e0 arbre unique permettent d\u2019obtenir en une seule \u00e9tape ce qu\u2019une machine \u00e0 double arbre ne parvient \u00e0 r\u00e9aliser qu\u2019en deux \u00e9tapes.<\/p>\n<h3>Les meilleures applications<\/h3>\n<ul>\n<li>Lignes de recyclage du plastique produisant des flocons lav\u00e9s<\/li>\n<li>R\u00e9cup\u00e9ration interne des d\u00e9chets post-industriels<\/li>\n<li>Broyage des tuyaux et des profil\u00e9s avant la granulation<\/li>\n<li>D\u00e9chiquetage de films et de fibres (avec v\u00e9rin \u00e0 bras oscillant)<\/li>\n<li>Pr\u00e9-broyage des bouteilles en PET avant le lavage<\/li>\n<\/ul>\n<h3>Limites<\/h3>\n<ul>\n<li>Sensible aux particules m\u00e9talliques \u2014 n\u00e9cessite l'utilisation d'un aimant en amont<\/li>\n<li>Ne convient pas aux d\u00e9chets post-consommation fortement contamin\u00e9s<\/li>\n<li>Le d\u00e9bit diminue consid\u00e9rablement avec une alimentation l\u00e9g\u00e8re ou souple (sauf si le syst\u00e8me est \u00e9quip\u00e9 d'un bras oscillant)<\/li>\n<\/ul>\n<h2>Quand opter pour un broyeur \u00e0 double arbre ?<\/h2>\n<p>Optez pour un broyeur \u00e0 double arbre lorsque le <strong>Les crit\u00e8res d'entr\u00e9e sont stricts, tandis que les sp\u00e9cifications de sortie sont vagues.<\/strong>. Son action de d\u00e9chiquetage \u00e0 faible vitesse et \u00e0 couple \u00e9lev\u00e9 permet de venir \u00e0 bout de la terre, des cailloux et des d\u00e9bris m\u00e9talliques qui d\u00e9truiraient un rotor \u00e0 arbre unique.<\/p>\n<h3>Les meilleures applications<\/h3>\n<ul>\n<li>Pr\u00e9-broyage des d\u00e9chets mixtes post-consommation<\/li>\n<li>Recyclage des d\u00e9chets encombrants et des meubles<\/li>\n<li>Broyage de pneus et de caoutchouc<\/li>\n<li>Traitement des d\u00e9chets d'\u00e9quipements \u00e9lectriques et \u00e9lectroniques (DEEE)<\/li>\n<li>Recyclage de la ferraille et des c\u00e2bles<\/li>\n<li>R\u00e9duction du volume des d\u00e9chets municipaux solides (DMS)<\/li>\n<li>D\u00e9chets textiles et de moquette<\/li>\n<\/ul>\n<h3>Limites<\/h3>\n<ul>\n<li>Le r\u00e9sultat est grossier et irr\u00e9gulier \u2014 ne convient pas comme format final<\/li>\n<li>N\u00e9cessite un deuxi\u00e8me \u00e9tage (granulateur ou broyeur \u00e0 arbre unique) pour obtenir des flocons de taille d\u00e9finie<\/li>\n<li>Co\u00fbt total du syst\u00e8me plus \u00e9lev\u00e9 lorsqu'une deuxi\u00e8me machine est n\u00e9cessaire<\/li>\n<\/ul>\n<h2>Configuration en deux \u00e9tapes : le meilleur des deux mondes<\/h2>\n<p>Pour les flux d'alimentation sales ou difficiles \u00e0 traiter, lorsqu'une granulom\u00e9trie de sortie d\u00e9finie est requise, la solution standard consiste \u00e0 utiliser un <strong>syst\u00e8me \u00e0 deux \u00e9tages<\/strong>:<\/p>\n<p><strong>Broyeur \u00e0 double arbre \u2192 Convoyeur \u2192 Broyeur \u00e0 arbre unique \u2192 Granulateur<\/strong><\/p>\n<p>Le broyeur \u00e0 double arbre assure la r\u00e9duction grossi\u00e8re du volume et limite le risque de contamination. Le broyeur \u00e0 arbre unique (ou granulateur) produit les flocons finaux de taille d\u00e9finie. Cette configuration prot\u00e8ge les lames de pr\u00e9cision du deuxi\u00e8me \u00e9tage tout en fournissant un produit pr\u00eat \u00e0 \u00eatre achemin\u00e9 vers la cha\u00eene de lavage.<\/p>\n<h2>Probl\u00e8mes courants et solutions<\/h2>\n<h3>Probl\u00e8me n\u00b0 1 : faible d\u00e9bit d'un broyeur \u00e0 arbre unique<\/h3>\n<p><strong>Motif :<\/strong> Un mat\u00e9riau l\u00e9ger ou souple flotte au-dessus du rotor. Le piston ne parvient pas \u00e0 le presser efficacement contre les couteaux.<\/p>\n<p><strong>Solution :<\/strong> Optez pour un syst\u00e8me \u00e0 bras oscillant qui appuie sur les mat\u00e9riaux par le haut, ou pr\u00e9d\u00e9coupez les articles volumineux \u00e0 l'aide d'une guillotine.<\/p>\n<h3>Probl\u00e8me n\u00b0 2 : usure excessive des couteaux sur un broyeur \u00e0 arbre unique<\/h3>\n<p><strong>Motif :<\/strong> Pr\u00e9sence de m\u00e9taux \u00e9trangers ou de contaminants abrasifs dans le flux d'alimentation.<\/p>\n<p><strong>Solution :<\/strong> Installez un aimant ou un d\u00e9tecteur de m\u00e9taux en amont. Pour les flux fortement contamin\u00e9s, ajoutez un pr\u00e9-broyeur \u00e0 double arbre.<\/p>\n<h3>Probl\u00e8me n\u00b0 3 : la granulom\u00e9trie des r\u00e9sidus issus du broyeur \u00e0 double arbre est trop grossi\u00e8re pour les \u00e9tapes en aval<\/h3>\n<p><strong>Motif :<\/strong> En l'absence d'\u00e9cran, la taille de sortie d\u00e9pend enti\u00e8rement de la largeur de la d\u00e9coupeuse.<\/p>\n<p><strong>Solution :<\/strong> Ajoutez un broyeur ou un granulateur \u00e0 arbre unique en deuxi\u00e8me \u00e9tape. Il s'agit de la configuration standard pour les applications de cha\u00eenes de lavage.<\/p>\n<h3>Probl\u00e8me n\u00b0 4 : blocage d'un arbre sur un broyeur \u00e0 double arbre<\/h3>\n<p><strong>Motif :<\/strong> Une alimentation excessive ou des mat\u00e9riaux trop volumineux d\u00e9passant la capacit\u00e9 de la chambre.<\/p>\n<p><strong>Solution :<\/strong> Utilisez une machine \u00e9quip\u00e9e d'une protection contre les surcharges avec inversion automatique. Maintenez des vitesses d'avance constantes et pr\u00e9d\u00e9coupez les pi\u00e8ces trop volumineuses.<\/p>\n<h2>Comparaison des co\u00fbts : achat, \u00e9nergie et entretien<\/h2>\n<table>\n<tr>\n<th>Facteur de co\u00fbt<\/th>\n<th>Broyeur \u00e0 arbre unique<\/th>\n<th>D\u00e9chiqueteur \u00e0 double arbre<\/th>\n<\/tr>\n<tr>\n<td>Prix d'achat<\/td>\n<td>Mod\u00e9r\u00e9<\/td>\n<td>Sup\u00e9rieur (double motorisation)<\/td>\n<\/tr>\n<tr>\n<td>\u00c9nergie par tonne<\/td>\n<td>Mod\u00e9r\u00e9<\/td>\n<td>R\u00e9duire (mais ajouter un deuxi\u00e8me \u00e9tage si n\u00e9cessaire)<\/td>\n<\/tr>\n<tr>\n<td>Remplacement de la lame<\/td>\n<td>Faible co\u00fbt \u2014 plaquettes indexables, rotation 4\u00d7<\/td>\n<td>Sup\u00e9rieur \u2014 r\u00e9paration par soudure ou remplacement des pinces \u00e0 crochet<\/td>\n<\/tr>\n<tr>\n<td>Fr\u00e9quence d'entretien<\/td>\n<td>R\u00e9glage r\u00e9gulier de l'\u00e9cartement des lames<\/td>\n<td>Moins fr\u00e9quentes, mais les r\u00e9parations co\u00fbtent plus cher<\/td>\n<\/tr>\n<tr>\n<td>Risque d'interruption de service<\/td>\n<td>Mod\u00e9r\u00e9 (les coups de m\u00e9tal endommagent les couteaux)<\/td>\n<td>Inf\u00e9rieur (tol\u00e8re la contamination)<\/td>\n<\/tr>\n<\/table>\n<h2>Cadre d\u00e9cisionnel : quatre questions \u00e0 se poser<\/h2>\n<p>R\u00e9pondez \u00e0 ces quatre questions et le type de broyeur qui vous convient s'imposera de lui-m\u00eame :<\/p>\n<ol>\n<li><strong>Quelle taille de sortie faut-il pr\u00e9voir pour l'\u00e9tape suivante ?<\/strong> \u00c9cailles bien d\u00e9finies d\u2019environ 80 mm ou moins \u2192 arbre unique. Bandes grossi\u00e8res acceptables \u2192 double arbre.<\/li>\n<li><strong>Dans quelle mesure l'alimentation est-elle saine ?<\/strong> D\u00e9chets post-industriels tri\u00e9s \u2192 broyeur \u00e0 arbre unique. D\u00e9chets sales, m\u00e9lang\u00e9s et contamin\u00e9s par des m\u00e9taux \u2192 broyeur \u00e0 double arbre (ou \u00e0 deux \u00e9tages).<\/li>\n<li><strong>Quelle est la forme de l'aliment ?<\/strong> De forme anguleuse et compacte \u2192 un seul axe avec un v\u00e9rin horizontal. Volumineux, souple, roulant, avec des parties creuses \u2192 un seul axe avec un bras oscillant, ou deux axes.<\/li>\n<li><strong>Y a-t-il des pi\u00e8ces trop grandes pour la chambre ?<\/strong> Les balles compress\u00e9es et les morceaux trop volumineux peuvent n\u00e9cessiter une d\u00e9coupe pr\u00e9alable avant d'\u00eatre trait\u00e9s par l'un ou l'autre de ces deux types de broyeurs.<\/li>\n<\/ol>\n<h2>FAQ<\/h2>\n<h3>Quelle est la principale diff\u00e9rence entre un broyeur \u00e0 arbre unique et un broyeur \u00e0 double arbre ?<\/h3>\n<p>Un broyeur \u00e0 arbre unique d\u00e9coupe les mati\u00e8res \u00e0 l'aide d'un rotor contre un tamis, produisant en une seule \u00e9tape des lamelles uniformes de 20 \u00e0 80 mm. Un broyeur \u00e0 double arbre d\u00e9chiquette les mati\u00e8res entre deux arbres tournant en sens inverse, sans tamis, produisant des lamelles grossi\u00e8res de 50 \u00e0 200+ mm. Le mod\u00e8le \u00e0 arbre unique convient \u00e0 une production cibl\u00e9e destin\u00e9e au lavage ou \u00e0 la granulation ; le mod\u00e8le \u00e0 double arbre convient aux mati\u00e8res premi\u00e8res sales et volumineuses pour lesquelles une production grossi\u00e8re est acceptable.<\/p>\n<h3>Quel broyeur est le plus adapt\u00e9 au recyclage du plastique ?<\/h3>\n<p>Pour la plupart des op\u00e9rations de recyclage du plastique \u2014 o\u00f9 les copeaux alimentent une ligne de lavage ou un granulateur \u2014, un broyeur \u00e0 arbre unique est la solution la plus adapt\u00e9e, car son tamis permet d'obtenir la granulom\u00e9trie souhait\u00e9e en une seule \u00e9tape. Un broyeur \u00e0 double arbre est quant \u00e0 lui plus efficace en tant que pr\u00e9-broyeur pour les flux sales ou m\u00e9lang\u00e9s, avant une deuxi\u00e8me \u00e9tape de broyage plus fin.<\/p>\n<h3>Un broyeur \u00e0 double arbre peut-il produire des copeaux fins ?<\/h3>\n<p>Non. Les broyeurs \u00e0 double arbre ne sont pas \u00e9quip\u00e9s de tamis ; leur produit est donc grossier et irr\u00e9gulier. Si vous avez besoin de copeaux fins, ajoutez un broyeur ou un granulateur \u00e0 arbre unique en deuxi\u00e8me \u00e9tape, en aval de la machine \u00e0 double arbre.<\/p>\n<h3>Un broyeur \u00e0 arbre unique n\u00e9cessite-t-il une alimentation en mati\u00e8re propre ?<\/h3>\n<p>Oui. Les lames de pr\u00e9cision sont sensibles aux m\u00e9taux \u00e9trangers et aux abrasifs lourds. Les d\u00e9chets post-consommation doivent d'abord passer par un aimant. Pour les flux fortement contamin\u00e9s, un pr\u00e9-broyeur \u00e0 double arbre prot\u00e8ge la machine \u00e0 arbre unique.<\/p>\n<h3>Pourquoi le syst\u00e8me d'alimentation est-il important sur un broyeur \u00e0 arbre unique ?<\/h3>\n<p>En effet, le rotor ne coupe que les mat\u00e9riaux qui sont press\u00e9s contre lui. Un v\u00e9rin horizontal laisse les mat\u00e9riaux l\u00e9gers ou souples flotter au-dessus du rotor, ce qui r\u00e9duit consid\u00e9rablement le d\u00e9bit. Un v\u00e9rin \u00e0 bras oscillant appuie sur les mat\u00e9riaux par le haut, maintenant ainsi les rouleaux de film, les pi\u00e8ces creuses et les formes h\u00e9t\u00e9rog\u00e8nes en contact avec les lames \u2014 c'est ce qui fait la diff\u00e9rence entre le rendement th\u00e9orique et le rendement r\u00e9el lors d'une alimentation difficile.<\/p>\n<h2>Solution Streamline Eco Tech<\/h2>\n<p>Streamline Eco Tech propose \u00e0 la fois <strong>Broyeurs \u00e0 arbre unique<\/strong> et <strong>Broyeurs \u00e0 double arbre<\/strong> pour le recyclage des plastiques, le traitement des d\u00e9chets et les applications de broyage. Nos broyeurs sont con\u00e7us pour s'adapter \u00e0 diff\u00e9rents types de mat\u00e9riaux, niveaux de contamination et exigences de rendement \u2014 des d\u00e9chets post-industriels propres aux d\u00e9chets post-consommation mixtes.<\/p>\n<p>Nous concevons \u00e9galement des solutions compl\u00e8tes <strong>syst\u00e8mes de broyage en deux \u00e9tapes<\/strong> qui associent un pr\u00e9-broyage \u00e0 double arbre \u00e0 un broyage fin \u00e0 arbre unique, le tout int\u00e9gr\u00e9 \u00e0 des convoyeurs, un syst\u00e8me de s\u00e9paration des m\u00e9taux, des lignes de lavage et des granulateurs. Cette approche pr\u00e9serve les composants de d\u00e9coupe de pr\u00e9cision, r\u00e9duit les co\u00fbts d'exploitation et permet d'obtenir la granulom\u00e9trie exacte requise par votre processus en aval.<\/p>\n<p>Contactez Streamline Eco Tech en pr\u00e9cisant le type de mat\u00e9riau, le niveau de contamination, les dimensions maximales des morceaux et la taille de sortie souhait\u00e9e. Nous vous recommanderons la configuration de broyeur la mieux adapt\u00e9e \u2014 \u00e0 arbre unique, \u00e0 double arbre ou \u00e0 deux \u00e9tages \u2014 en fonction de votre application sp\u00e9cifique.<\/p>\n<h2>Foire aux questions<\/h2>\n<h3>\u00c0 quoi sert un broyeur \u00e0 arbre unique ?<\/h3>\n<p>Un broyeur \u00e0 arbre unique produit des copeaux uniformes, de taille adapt\u00e9e au criblage, destin\u00e9s aux lignes de lavage, aux granulateurs et aux extrudeuses. C'est le choix standard pour les d\u00e9chets plastiques post-industriels, les tuyaux, les profil\u00e9s, les bobines de film et les morceaux de purge, lorsque la taille du produit final est un crit\u00e8re d\u00e9terminant.<\/p>\n<h3>\u00c0 quoi sert un broyeur \u00e0 double arbre ?<\/h3>\n<p>Un broyeur \u00e0 double arbre assure une r\u00e9duction grossi\u00e8re du volume des mat\u00e9riaux sales, volumineux ou m\u00e9lang\u00e9s, notamment les d\u00e9chets municipaux, les pneus, les d\u00e9chets \u00e9lectroniques, la ferraille et les textiles. Il constitue la premi\u00e8re \u00e9tape d'un syst\u00e8me \u00e0 deux \u00e9tapes lorsque l'on souhaite obtenir un produit fin.<\/p>\n<h3>Puis-je utiliser un seul broyeur pour tous les mat\u00e9riaux ?<\/h3>\n<p>Aucun type de broyeur ne permet \u00e0 lui seul de traiter efficacement tous les mat\u00e9riaux. Les machines con\u00e7ues pour traiter \u00e0 la fois des d\u00e9chets propres et des d\u00e9chets souill\u00e9s font des compromis soit au niveau de la protection des couteaux, soit au niveau de la qualit\u00e9 du produit final. La solution standard consiste en une ligne de traitement en deux \u00e9tapes : un pr\u00e9-broyeur \u00e0 double arbre suivi d\u2019un broyeur ou d\u2019un granulateur \u00e0 arbre unique.<\/p>","protected":false},"excerpt":{"rendered":"<p>Un broyeur \u00e0 arbre unique d\u00e9coupe les mat\u00e9riaux \u00e0 l'aide d'un rotor contre un tamis afin de produire des flocons uniformes, tandis qu'un broyeur \u00e0 double arbre d\u00e9chiquette les mat\u00e9riaux entre deux arbres tournant en sens inverse pour une r\u00e9duction de volume grossi\u00e8re. Choisir le mauvais type de broyeur peut entra\u00eener l'endommagement des lames, un faible d\u00e9bit ou une taille de sortie qui ne permet pas de\u2026<\/p>","protected":false},"author":1,"featured_media":1733,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"off","_et_pb_old_content":"A <strong>Single Shaft Shredder<\/strong> cuts material with one rotor against a screen to produce uniform flake, while a <strong>Double Shaft Shredder<\/strong> tears material between two counter-rotating shafts for coarse volume reduction. Choosing the wrong type leads to knife damage, low throughput, or an output size that cannot feed downstream equipment. This article compares single shaft and double shaft shredders across output size, material suitability, feed tolerance, maintenance cost, and energy consumption \u2014 and explains why the feeding system matters as much as the shaft count.\n\n<h2>What Is a Single Shaft Shredder?<\/h2>\n\nA single shaft shredder uses one rotor fitted with indexable cutting knives that shear material against fixed counter-knives. A screen underneath controls output size: material cannot exit until it passes through the screen openings, producing a defined flake size typically between 20\u201380 mm.\n\nA hydraulic ram or swing-arm presses material onto the rotor. This design makes single shaft shredders ideal for applications where output size must be consistent \u2014 such as feeding washing lines, granulators, or extruders.\n\n<h3>Typical Materials Processed<\/h3>\n\n<ul>\n<li>Plastic purge lumps and start-up cakes<\/li>\n<li>Pipe and profile sections (HDPE, PVC, PP)<\/li>\n<li>Film and nonwoven rolls<\/li>\n<li>Crates, drums, and pallets<\/li>\n<li>Post-industrial rigid scrap<\/li>\n<li>Injection molding sprues and runners<\/li>\n<\/ul>\n\n<h3>Typical Technical Parameters<\/h3>\n\n<table>\n<tr><th>Parameter<\/th><th>Typical Range<\/th><\/tr>\n<tr><td>Rotor Speed<\/td><td>60\u2013150 RPM<\/td><\/tr>\n<tr><td>Motor Power<\/td><td>22\u2013160 kW<\/td><\/tr>\n<tr><td>Output Size<\/td><td>20\u201380 mm (screen-defined)<\/td><\/tr>\n<tr><td>Throughput<\/td><td>300\u20133,000 kg\/h<\/td><\/tr>\n<tr><td>Knife Type<\/td><td>Indexable inserts (rotatable 4\u00d7)<\/td><\/tr>\n<\/table>\n\n<h2>What Is a Double Shaft Shredder?<\/h2>\n\nA double shaft shredder has two slow-turning shafts with interlocking hooked cutters that grip and tear material between them. There is usually no screen: output size is set by cutter width and comes out as coarse, irregular strips \u2014 typically 50\u2013200 mm.\n\nThe shafts self-feed by gripping material, so no pusher or ram is required. The low-speed, high-torque design tolerates dirt, stones, and incidental metal that would damage a single shaft rotor. This makes double shaft shredders the preferred choice for dirty, bulky, or mixed waste streams.\n\n<h3>Typical Materials Processed<\/h3>\n\n<ul>\n<li>Mixed post-consumer bales<\/li>\n<li>Bulky rigid waste and furniture<\/li>\n<li>Tires and rubber products<\/li>\n<li>Electronic waste (WEEE)<\/li>\n<li>Scrap metal and aluminum profiles<\/li>\n<li>Municipal solid waste (MSW)<\/li>\n<li>Textile and fabric waste<\/li>\n<\/ul>\n\n<h3>Typical Technical Parameters<\/h3>\n\n<table>\n<tr><th>Parameter<\/th><th>Typical Range<\/th><\/tr>\n<tr><td>Shaft Speed<\/td><td>10\u201340 RPM<\/td><\/tr>\n<tr><td>Motor Power<\/td><td>15\u2013110 kW \u00d7 2<\/td><\/tr>\n<tr><td>Output Size<\/td><td>50\u2013200+ mm (cutter-defined)<\/td><\/tr>\n<tr><td>Throughput<\/td><td>500\u201310,000 kg\/h<\/td><\/tr>\n<tr><td>Cutter Type<\/td><td>Hooked cutters (weld-repair or replace)<\/td><\/tr>\n<\/table>\n\n<h2>Single Shaft vs Double Shaft Shredder: Key Differences<\/h2>\n\n<table>\n<tr><th>Comparison<\/th><th>Single Shaft Shredder<\/th><th>Double Shaft Shredder<\/th><\/tr>\n<tr><td>Working Method<\/td><td>Cutting against a screen<\/td><td>Tearing between two shafts<\/td><\/tr>\n<tr><td>Output Size<\/td><td>20\u201380 mm, uniform<\/td><td>50\u2013200+ mm, irregular<\/td><\/tr>\n<tr><td>Output Application<\/td><td>Direct to washing line or granulator<\/td><td>Pre-shredding; needs second stage<\/td><\/tr>\n<tr><td>Feed Tolerance<\/td><td>Needs reasonably clean feed<\/td><td>Forgiving of dirt, metal, mixed waste<\/td><\/tr>\n<tr><td>Shaft Speed<\/td><td>60\u2013150 RPM<\/td><td>10\u201340 RPM<\/td><\/tr>\n<tr><td>Feeding Method<\/td><td>Hydraulic ram or swing-arm<\/td><td>Shafts self-feed<\/td><\/tr>\n<tr><td>Noise Level<\/td><td>Moderate<\/td><td>Lower<\/td><\/tr>\n<tr><td>Knife Maintenance<\/td><td>Indexable inserts, rotate 4\u00d7<\/td><td>Weld-repair or replace cutters<\/td><\/tr>\n<tr><td>Energy per Ton<\/td><td>Moderate<\/td><td>Lower (but may need second stage)<\/td><\/tr>\n<tr><td>Best For<\/td><td>Defined flake for downstream processing<\/td><td>Coarse volume reduction of tough feed<\/td><\/tr>\n<\/table>\n\n<h2>How Does a Single Shaft Shredder Work?<\/h2>\n\n<h3>Process Flow<\/h3>\n\n<ol>\n<li><strong>Material Loading:<\/strong> Material is loaded into the hopper.<\/li>\n<li><strong>Hydraulic Feeding:<\/strong> A ram or swing-arm presses material against the rotor at controlled pressure.<\/li>\n<li><strong>Cutting:<\/strong> The rotor spins at 60\u2013150 RPM. Indexable knives cut material against fixed counter-knives.<\/li>\n<li><strong>Screening:<\/strong> Cut pieces pass through a screen underneath. Oversized pieces stay in the chamber for further cutting.<\/li>\n<li><strong>Discharge:<\/strong> Uniform flake exits the machine, ready for washing, granulation, or extrusion.<\/li>\n<\/ol>\n\n<h3>Why the Feeding System Matters<\/h3>\n\nTwo single shaft shredders with identical rotors can differ by 50% in real-world throughput \u2014 and the difference is the feeding system:\n\n<ul>\n<li><strong>Horizontal Ram:<\/strong> A hydraulic pusher slides material sideways into the rotor. Works well on dense, blocky feed. Light or springy material (film rolls, hollow parts) may float above the rotor.<\/li>\n<li><strong>Swing-Arm Ram:<\/strong> A pivot-mounted arm presses material down onto the rotor from above. Light material cannot float, hollow parts cannot bounce. Superior for film, big-bag scrap, and mixed shapes.<\/li>\n<li><strong>Gravity Feed:<\/strong> Material falls onto the rotor. Simple and low-cost, but unreliable for bulky or springy scrap.<\/li>\n<\/ul>\n\n<h2>How Does a Double Shaft Shredder Work?<\/h2>\n\n<h3>Process Flow<\/h3>\n\n<ol>\n<li><strong>Material Loading:<\/strong> Material is loaded into the hopper.<\/li>\n<li><strong>Self-Feeding:<\/strong> Counter-rotating shafts grip material and pull it inward without a ram.<\/li>\n<li><strong>Tearing:<\/strong> Hooked cutters on each shaft interlock at 10\u201340 RPM, tearing material into coarse strips.<\/li>\n<li><strong>Discharge:<\/strong> Irregular shredded pieces exit underneath. No screen restricts the flow.<\/li>\n<li><strong>Overload Protection:<\/strong> Auto-reverse clears jams automatically, then resumes forward rotation.<\/li>\n<\/ol>\n\n<h2>When to Choose a Single Shaft Shredder<\/h2>\n\nChoose a single shaft shredder when <strong>output size matters<\/strong>. If the shredded material feeds a washing line, granulator, or extruder, the screen-defined flake of a single shaft machine does in one stage what a double shaft machine needs two stages to reach.\n\n<h3>Best Applications<\/h3>\n\n<ul>\n<li>Plastic recycling lines producing washed flake<\/li>\n<li>In-house post-industrial scrap recovery<\/li>\n<li>Pipe and profile shredding before granulation<\/li>\n<li>Film and fiber shredding (with swing-arm ram)<\/li>\n<li>PET bottle pre-shredding before washing<\/li>\n<\/ul>\n\n<h3>Limitations<\/h3>\n\n<ul>\n<li>Sensitive to tramp metal \u2014 requires upstream magnet<\/li>\n<li>Not suitable for heavily contaminated post-consumer waste<\/li>\n<li>Throughput drops significantly with light or springy feed (unless swing-arm equipped)<\/li>\n<\/ul>\n\n<h2>When to Choose a Double Shaft Shredder<\/h2>\n\nChoose a double shaft shredder when the <strong>input is tough and the output spec is loose<\/strong>. The low-speed, high-torque tearing action handles dirt, stones, and incidental metal that would destroy a single shaft rotor.\n\n<h3>Best Applications<\/h3>\n\n<ul>\n<li>Mixed post-consumer waste pre-shredding<\/li>\n<li>Bulky waste and furniture recycling<\/li>\n<li>Tire and rubber shredding<\/li>\n<li>Electronic waste (WEEE) processing<\/li>\n<li>Scrap metal and cable recycling<\/li>\n<li>Municipal solid waste (MSW) volume reduction<\/li>\n<li>Textile and carpet waste<\/li>\n<\/ul>\n\n<h3>Limitations<\/h3>\n\n<ul>\n<li>Output is coarse and irregular \u2014 not suitable as final size<\/li>\n<li>Requires a second stage (granulator or single shaft) for defined flake<\/li>\n<li>Higher total system cost when a second machine is needed<\/li>\n<\/ul>\n\n<h2>Two-Stage Configuration: The Best of Both<\/h2>\n\nFor dirty or demanding feed streams where a defined output size is required, the standard solution is a <strong>two-stage system<\/strong>:\n\n<p><strong>Double Shaft Shredder \u2192 Conveyor \u2192 Single Shaft Shredder \u2192 Granulator<\/strong><\/p>\n\nThe double shaft shredder handles the coarse volume reduction and absorbs the contamination risk. The single shaft shredder (or granulator) produces the final defined flake. This configuration protects the precision knives of the second stage while delivering washing-line-ready output.\n\n<h2>Common Problems and Solutions<\/h2>\n\n<h3>Problem 1: Low Throughput on a Single Shaft Shredder<\/h3>\n\n<p><strong>Cause:<\/strong> Light or springy material floats above the rotor. The ram cannot press it effectively onto the knives.<\/p>\n<p><strong>Solution:<\/strong> Switch to a swing-arm ram design that presses material down from above, or pre-cut bulky items with a guillotine.<\/p>\n\n<h3>Problem 2: Excessive Knife Wear on a Single Shaft Shredder<\/h3>\n\n<p><strong>Cause:<\/strong> Tramp metal or abrasive contaminants in the feed stream.<\/p>\n<p><strong>Solution:<\/strong> Install an upstream magnet or metal detector. For heavily contaminated streams, add a double shaft pre-shredder.<\/p>\n\n<h3>Problem 3: Double Shaft Shredder Output Too Coarse for Downstream<\/h3>\n\n<p><strong>Cause:<\/strong> No screen means output size depends entirely on cutter width.<\/p>\n<p><strong>Solution:<\/strong> Add a single shaft shredder or granulator as a second stage. This is the standard configuration for washing-line applications.<\/p>\n\n<h3>Problem 4: Shaft Jamming on a Double Shaft Shredder<\/h3>\n\n<p><strong>Cause:<\/strong> Overfeeding or oversized material exceeding chamber capacity.<\/p>\n<p><strong>Solution:<\/strong> Use a machine with auto-reverse overload protection. Maintain consistent feed rates and pre-cut oversized items.<\/p>\n\n<h2>Cost Comparison: Purchase, Energy, and Maintenance<\/h2>\n\n<table>\n<tr><th>Cost Factor<\/th><th>Single Shaft Shredder<\/th><th>Double Shaft Shredder<\/th><\/tr>\n<tr><td>Purchase Price<\/td><td>Moderate<\/td><td>Higher (twin drives)<\/td><\/tr>\n<tr><td>Energy per Ton<\/td><td>Moderate<\/td><td>Lower (but add second stage if needed)<\/td><\/tr>\n<tr><td>Knife Replacement<\/td><td>Low cost \u2014 indexable inserts, rotate 4\u00d7<\/td><td>Higher \u2014 weld-repair or replace hook cutters<\/td><\/tr>\n<tr><td>Maintenance Frequency<\/td><td>Regular knife gap adjustment<\/td><td>Less frequent, but repairs cost more<\/td><\/tr>\n<tr><td>Downtime Risk<\/td><td>Moderate (metal strikes damage knives)<\/td><td>Lower (tolerates contamination)<\/td><\/tr>\n<\/table>\n\n<h2>Decision Framework: Four Questions to Ask<\/h2>\n\n<p>Answer these four questions and the right shredder type picks itself:<\/p>\n\n<ol>\n<li><strong>What output size does the next stage need?<\/strong> Defined flake under ~80 mm \u2192 single shaft. Coarse strips acceptable \u2192 double shaft.<\/li>\n<li><strong>How clean is the feed?<\/strong> Sorted post-industrial \u2192 single shaft. Dirty, mixed, metal-contaminated \u2192 double shaft (or two-stage).<\/li>\n<li><strong>What shape is the feed?<\/strong> Blocky and dense \u2192 single shaft with horizontal ram. Bulky, springy, rolls, hollow parts \u2192 single shaft with swing-arm, or double shaft.<\/li>\n<li><strong>Is anything oversize for the chamber?<\/strong> Compressed bales and oversized lumps may need pre-cutting before either shredder type.<\/li>\n<\/ol>\n\n<h2>FAQ<\/h2>\n\n<h3>What is the main difference between a single shaft and double shaft shredder?<\/h3>\n\n<p>A single shaft shredder cuts material with one rotor against a screen, producing uniform 20\u201380 mm flake in one stage. A double shaft shredder tears material between two counter-rotating shafts without a screen, producing coarse 50\u2013200+ mm strips. Single shaft suits defined output for washing or pelletizing; double shaft suits dirty, bulky feed where coarse output is acceptable.<\/p>\n\n<h3>Which shredder is better for plastic recycling?<\/h3>\n\n<p>For most plastic recycling \u2014 where flake feeds a washing line or granulator \u2014 a single shaft shredder is the better fit because the screen delivers the defined size in one stage. A double shaft shredder works best as a pre-shredder for dirty or mixed streams, followed by a second finer stage.<\/p>\n\n<h3>Can a double shaft shredder produce fine flake?<\/h3>\n\n<p>No. Double shaft shredders do not have a screen, so output is coarse and irregular. If fine flake is required, add a single shaft shredder or granulator as a second stage after the double shaft machine.<\/p>\n\n<h3>Does a single shaft shredder need clean feed?<\/h3>\n\n<p>Yes. The precision knife inserts are sensitive to tramp metal and heavy abrasives. Post-consumer feed should pass through a magnet first. For heavily contaminated streams, a double shaft pre-shredder protects the single shaft machine.<\/p>\n\n<h3>Why does the feeding system matter on a single shaft shredder?<\/h3>\n\n<p>Because the rotor only cuts material that is pressed against it. A horizontal ram lets light or springy material float above the rotor, collapsing throughput. A swing-arm ram presses material down from above, keeping film rolls, hollow parts, and mixed shapes engaged with the knives \u2014 the difference between nameplate and actual output on difficult feed.<\/p>\n\n<h2>Streamline Eco Tech Solution<\/h2>\n\n<p>Streamline Eco Tech provides both <strong>Single Shaft Shredders<\/strong> and <strong>Double Shaft Shredders<\/strong> for plastic recycling, waste processing, and size reduction applications. Our shredders are designed for different material types, contamination levels, and output requirements \u2014 from clean post-industrial scrap to mixed post-consumer waste.<\/p>\n\n<p>We also design complete <strong>two-stage shredding systems<\/strong> that combine double shaft pre-shredding with single shaft fine-sizing, integrated with conveyors, metal separation, washing lines, and granulators. This approach protects precision cutting components, reduces operating costs, and delivers the exact output size your downstream process requires.<\/p>\n\n<p>Contact Streamline Eco Tech with your material type, contamination level, largest piece dimensions, and target output size. We recommend the right shredder configuration \u2014 single shaft, double shaft, or two-stage \u2014 based on your specific application.<\/p>\n\n<h2>Frequently Asked Questions<\/h2>\n\n<h3>What is a single shaft shredder used for?<\/h3>\n\n<p>A single shaft shredder produces uniform, screen-sized flake for washing lines, granulators, and extruders. It is the standard choice for post-industrial plastic scrap, pipe, profile, film rolls, and purge lumps where output size matters.<\/p>\n\n<h3>What is a double shaft shredder used for?<\/h3>\n\n<p>A double shaft shredder performs coarse volume reduction on dirty, bulky, or mixed materials \u2014 including MSW, tires, e-waste, scrap metal, and textiles. It is the first stage in a two-stage system when fine output is required.<\/p>\n\n<h3>Can I use one shredder for all materials?<\/h3>\n\n<p>No single shredder type handles all materials well. Machines that attempt both clean and dirty feed compromise on knife protection or output quality. The standard solution is a two-stage line: double shaft pre-shredder followed by a single shaft shredder or granulator.<\/p>","_et_gb_content_width":"","footnotes":""},"categories":[31,1],"tags":[],"class_list":["post-2013","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","category-shredding-machines-industrial-shredders"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\r\n<title>Single Shaft vs Double Shaft Shredder: Which One Do You Need? - Industrial shredders &amp; recycling equipment - Streamline Eco Tech<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/slecotech.com\/fr\/single-shaft-vs-double-shaft-shredder-which-one-do-you-need\/\" \/>\r\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"Single Shaft vs Double Shaft Shredder: Which One Do You Need? - Industrial shredders &amp; recycling equipment - Streamline Eco Tech\" \/>\r\n<meta property=\"og:description\" content=\"A Single Shaft Shredder cuts material with one rotor against a screen to produce uniform flake, while a Double Shaft Shredder tears material between two counter-rotating shafts for coarse volume reduction. 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