{"id":29227,"date":"2026-05-08T02:27:56","date_gmt":"2026-05-08T02:27:56","guid":{"rendered":"https:\/\/b17nliqfki.wpdns.site\/?page_id=29227"},"modified":"2026-05-27T07:14:43","modified_gmt":"2026-05-27T07:14:43","slug":"four-shaft-shredder","status":"publish","type":"page","link":"https:\/\/www.arzir.com\/it\/four-shaft-shredder\/","title":{"rendered":"Four-Shaft Shredder"},"content":{"rendered":"\n\n\n\n \n \n Four-Shaft Shredder | Industrial Quad-Shaft Shredder for Uniform Fine Output \u2014 Plastic, E-Waste, Paper & Confidential Destruction<\/title>\n <meta name=\"description\" content=\"Heavy-duty four-shaft shredder with two counter-rotating cutter pairs and an integrated bottom screen \u2014 delivering precise, uniform particle output for plastic recycling, e-waste processing, document destruction, and SRF\/RDF preparation. Low speed, high torque, screen-controlled output size.\">\n <meta name=\"keywords\" content=\"four shaft shredder, four-shaft shredder, quad shaft shredder, 4 shaft shredder, quad-shaft shredder, industrial four shaft shredder, fine shredder, secondary shredder, plastic shredder, e-waste shredder, document shredder, confidential destruction shredder, SRF shredder, RDF shredder, uniform output shredder, screen shredder, recycling shredder machine\">\n <meta name=\"robots\" content=\"index, follow\">\n <meta name=\"author\" content=\"ARZIR\">\n <link rel=\"canonical\" href=\"\">\n <meta property=\"og:type\" content=\"website\">\n <meta property=\"og:title\" content=\"Four-Shaft Shredder | Industrial Quad-Shaft Shredder for Precise Uniform Output\">\n <meta property=\"og:description\" content=\"Four-shaft shredder with dual cutter pairs and integrated bottom screen for fine, uniform particle output \u2014 engineered for plastic recycling, e-waste, document destruction, SRF\/RDF, and secondary size reduction.\">\n <meta property=\"og:locale\" content=\"en_US\">\n <meta name=\"twitter:card\" content=\"summary_large_image\">\n <meta name=\"twitter:title\" content=\"Four-Shaft Shredder | Industrial Quad-Shaft Uniform-Output Shredder\">\n <meta name=\"twitter:description\" content=\"Industrial four-shaft shredder for plastic, e-waste, paper, confidential documents, and SRF\/RDF \u2014 screen-controlled uniform particle size, low speed, high torque, dual cutter stage.\">\n <script type=\"application\/ld+json\">\n {\n \"@context\": \"https:\/\/schema.org\",\n \"@type\": \"Product\",\n \"name\": \"Industrial Four-Shaft Shredder\",\n \"description\": \"Heavy-duty quad-shaft shredder built around two pairs of counter-rotating cutter shafts with an integrated bottom screen. The upper cutter pair pre-tears the feedstock; the lower pair re-shreds oversized particles back through the screen until every piece meets the specified output size. Engineered for precise, uniform secondary size reduction of plastics, e-waste, paper, confidential documents, SRF\/RDF preparation, and mixed light-fraction waste.\",\n \"category\": \"Industrial Machinery > Recycling Equipment > Shredders\",\n \"brand\": {\n \"@type\": \"Brand\",\n \"name\": \"ARZIR\"\n },\n \"offers\": {\n \"@type\": \"AggregateOffer\",\n \"priceCurrency\": \"USD\",\n \"availability\": \"https:\/\/schema.org\/InStock\"\n }\n }\n <\/script>\n <script type=\"application\/ld+json\">\n {\n \"@context\": \"https:\/\/schema.org\",\n \"@type\": \"FAQPage\",\n \"mainEntity\": [\n {\n \"@type\": \"Question\",\n \"name\": \"What is a four-shaft shredder?\",\n \"acceptedAnswer\": {\n \"@type\": \"Answer\",\n \"text\": \"A four-shaft shredder, also called a quad-shaft shredder, is an industrial size-reduction machine that uses two pairs of counter-rotating cutter shafts arranged in two stacked stages above an integrated bottom screen. The upper pair of shafts pre-tears the incoming feedstock; particles that are still oversized are returned by the lower pair and re-shredded until they pass through the screen aperture. This two-stage architecture delivers fine, uniform, screen-controlled output \u2014 making the four-shaft shredder the preferred choice for secondary size reduction of plastics, e-waste, paper, confidential documents, and SRF\/RDF preparation.\"\n }\n },\n {\n \"@type\": \"Question\",\n \"name\": \"What materials can a four-shaft shredder process?\",\n \"acceptedAnswer\": {\n \"@type\": \"Answer\",\n \"text\": \"Typical feedstock for a four-shaft shredder includes rigid and film plastics, plastic bottles and containers, HDPE and PET bales, electronic waste such as mobile phones, laptops, hard drives, and PCBs, confidential documents and paper archives, cardboard and paper bales, light aluminum profiles, cable offcuts, packaging waste, SRF\/RDF feed fractions, non-ferrous light scrap, pharmaceutical waste for destruction, and branded goods requiring certified IP destruction. Most four-shaft machines receive pre-shredded or relatively uniform feedstock from a primary twin-shaft shredder upstream.\"\n }\n },\n {\n \"@type\": \"Question\",\n \"name\": \"How does a four-shaft shredder differ from a double-shaft shredder?\",\n \"acceptedAnswer\": {\n \"@type\": \"Answer\",\n \"text\": \"A double-shaft shredder uses two counter-rotating shafts with no screen, producing coarse, irregular strips for primary size reduction of tough, bulky, and oversized feedstock. A four-shaft shredder adds a second pair of shafts and a bottom screen, creating a recirculating two-stage cutting cycle that re-shreds any particle too large to pass through the screen aperture. The result is fine, consistent, screen-controlled output suitable for downstream sorting, granulation, or direct fuel use \u2014 making the four-shaft shredder ideal for secondary or finish shredding, not primary reduction.\"\n }\n },\n {\n \"@type\": \"Question\",\n \"name\": \"What output particle size does a four-shaft shredder produce?\",\n \"acceptedAnswer\": {\n \"@type\": \"Answer\",\n \"text\": \"Because all output must pass through a fixed bottom screen, a four-shaft shredder guarantees a precise, upper-bound particle size. Typical screen apertures range from 15 mm to 80 mm, producing uniform flakes, strips, or granules depending on the cutter profile and feedstock. This screen-controlled output is a key advantage over double-shaft shredders \u2014 it eliminates oversized material and ensures consistent input quality for downstream optical sorters, air classifiers, washing lines, and granulators.\"\n }\n },\n {\n \"@type\": \"Question\",\n \"name\": \"What shaft size and motor power range is typical for a four-shaft shredder?\",\n \"acceptedAnswer\": {\n \"@type\": \"Answer\",\n \"text\": \"Industrial four-shaft shredders typically use shaft diameters between 150 mm and 400 mm with cutting chamber lengths between 500 mm and 2000 mm. Total installed drive power ranges from 15 kW on small document-destruction units up to 400 kW on heavy plastic and e-waste secondary shredders. Each of the four shafts is driven by its own motor-gearbox set, and rotational speed is kept low \u2014 typically 15\u201360 rpm \u2014 to maximize torque and minimize heat, dust, and noise.\"\n }\n },\n {\n \"@type\": \"Question\",\n \"name\": \"How does the bottom screen work in a four-shaft shredder?\",\n \"acceptedAnswer\": {\n \"@type\": \"Answer\",\n \"text\": \"The bottom screen in a four-shaft shredder sits directly below all four shafts. Particles small enough to pass through the screen aperture fall through and exit the machine on the discharge conveyor. Oversized particles are intercepted by the lower pair of shafts, which shear and re-tear them back up into the cutting zone between all four rotors. This recirculation continues until every piece is reduced below the screen aperture, guaranteeing 100% compliance with the specified maximum output size.\"\n }\n },\n {\n \"@type\": \"Question\",\n \"name\": \"Can a four-shaft shredder handle confidential document and data destruction?\",\n \"acceptedAnswer\": {\n \"@type\": \"Answer\",\n \"text\": \"Yes. The four-shaft shredder is widely used for certified confidential destruction of paper archives, hard drives, optical media, ID cards, currency, and branded or pharmaceutical products. The combination of a tight screen aperture (typically 15\u201325 mm for document destruction) and the recirculating two-stage cutting cycle ensures that no piece exits the machine above the certified destruction particle size \u2014 meeting DIN 66399 or equivalent security-level standards when the correct screen is fitted.\"\n }\n },\n {\n \"@type\": \"Question\",\n \"name\": \"Are the cutters on a four-shaft shredder replaceable?\",\n \"acceptedAnswer\": {\n \"@type\": \"Answer\",\n \"text\": \"Yes. Four-shaft shredders use individually bolted cutter discs and spacers on all four shafts. Each cutter can be removed, rotated to a fresh cutting edge, or replaced independently without dismounting the shafts. The bottom screen is also interchangeable \u2014 different aperture screens can be swapped to change the output particle size target for different products or campaigns. This modularity makes the four-shaft machine highly flexible and keeps wear-part downtime low.\"\n }\n },\n {\n \"@type\": \"Question\",\n \"name\": \"How does a four-shaft shredder protect itself from overload?\",\n \"acceptedAnswer\": {\n \"@type\": \"Answer\",\n \"text\": \"An integrated PLC continuously monitors the motor amperage and gearbox load on all four drives. On overload, the controller automatically reverses all shafts to clear any jammed or unshredable material, then resumes forward operation \u2014 typically without operator intervention. Torque-limiting couplings or shear pins provide final mechanical overload protection for gearboxes and shaft bearings on extreme shock loads. Four-shaft shredders are generally operated downstream of a primary shredder that removes the most damaging contraries.\"\n }\n },\n {\n \"@type\": \"Question\",\n \"name\": \"What maintenance does a four-shaft shredder require?\",\n \"acceptedAnswer\": {\n \"@type\": \"Answer\",\n \"text\": \"Routine maintenance includes daily visual inspection of the cutting chamber and screen condition, regular cutter rotation or replacement based on hourly wear data, screen aperture inspection for deformation, gearbox oil sampling on all four gearboxes, shaft bearing lubrication, PLC and drive system checks, and inspection of discharge conveyor components. Following manufacturer-recommended service intervals by shaft run-hours maximizes cutter and screen life, minimizes unplanned downtime, and protects the gearboxes and bearings on all four drive units.\"\n }\n }\n ]\n }\n <\/script>\n <style>\n * {\n margin: 0;\n padding: 0;\n box-sizing: border-box;\n }\n\n .entry-content,\n .post-content,\n .page-content,\n .site-content,\n .content-area,\n article.post,\n article.page,\n .elementor-widget-container,\n .elementor-widget-wrap,\n .elementor-element,\n .wp-block-group,\n .wp-block-post-content,\n .wp-block-post-content > div,\n .ast-container,\n .site-main {\n overflow: visible !important;\n }\n\n section.hero,\n section.metrics,\n section.overview,\n section.specifications,\n section.principle,\n section.materials,\n section.applications,\n section.scenarios,\n section.advantages,\n section.faq {\n width: 100vw !important;\n position: relative;\n left: 50% !important;\n right: 50% !important;\n margin-left: -50vw !important;\n margin-right: -50vw !important;\n }\n\n section.overview,\n section.applications {\n background-color: #F8F9FB !important;\n }\n\n :root {\n --primary: #1a2332;\n --accent: #c8a951;\n --accent-light: #e8d48b;\n --text: #2c3e50;\n --text-light: #5a6c7d;\n --bg: #ffffff;\n --bg-alt: #f8f9fb;\n --bg-dark: #0f1923;\n --border: #e2e8f0;\n }\n\n body {\n font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;\n color: var(--text);\n line-height: 1.7;\n background: var(--bg);\n -webkit-font-smoothing: antialiased;\n }\n\n .container {\n max-width: 1200px;\n margin: 0 auto;\n padding: 0 24px;\n }\n\n \/* \u2500\u2500 Hero \u2500\u2500 *\/\n .hero {\n background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2d42 100%);\n padding: 80px 0;\n position: relative;\n overflow: hidden;\n }\n\n .hero::before {\n content: '';\n position: absolute;\n top: 0; 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}\n\n .hero h1 .hero-title-accent {\n color: var(--accent) !important;\n white-space: nowrap;\n }\n\n .hero-desc {\n font-size: 1.1rem;\n color: #a0b0c0;\n line-height: 1.8;\n max-width: 520px;\n }\n\n .hero-image {\n display: flex;\n align-items: center;\n justify-content: center;\n }\n\n .hero-image-placeholder {\n width: 100%;\n aspect-ratio: 4\/3;\n background: linear-gradient(145deg, #1e3044 0%, #162536 100%);\n border: 1px solid rgba(255, 107, 44, 0.2);\n border-radius: 12px;\n display: flex;\n align-items: center;\n justify-content: center;\n position: relative;\n overflow: hidden;\n box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);\n }\n\n .hero-image-placeholder::after {\n content: '';\n position: absolute;\n inset: 0;\n background: linear-gradient(45deg, transparent 40%, rgba(200, 169, 81, 0.05) 50%, transparent 60%);\n }\n\n .hero-image-placeholder svg {\n width: 240px;\n height: 240px;\n opacity: 0.55;\n }\n\n \/* \u2500\u2500 Metrics \u2500\u2500 *\/\n .metrics {\n padding: 60px 0;\n background: var(--bg);\n }\n\n .metrics-grid {\n display: grid;\n grid-template-columns: repeat(4, 1fr);\n gap: 32px;\n }\n\n .metric-card {\n text-align: center;\n padding: 32px 20px;\n border: 1px solid var(--border);\n border-radius: 10px;\n transition: all 0.3s ease;\n }\n\n .metric-card:hover {\n border-color: var(--accent);\n box-shadow: 0 8px 30px rgba(200, 169, 81, 0.08);\n }\n\n .metric-value {\n font-size: 2.2rem;\n font-weight: 700;\n color: var(--primary);\n margin-bottom: 8px;\n }\n\n .metric-value span {\n font-size: 1rem;\n color: var(--accent);\n font-weight: 600;\n }\n\n .metric-label {\n font-size: 0.9rem;\n color: var(--text-light);\n font-weight: 500;\n }\n\n \/* \u2500\u2500 Section commons \u2500\u2500 *\/\n .section-label {\n display: inline-block;\n font-size: 0.75rem;\n font-weight: 700;\n letter-spacing: 2px;\n text-transform: uppercase;\n color: var(--accent);\n margin-bottom: 16px;\n }\n\n .section-title {\n font-size: 2rem;\n font-weight: 700;\n color: var(--primary);\n margin-bottom: 20px;\n line-height: 1.3;\n }\n\n .section-desc {\n font-size: 1.05rem;\n color: var(--text-light);\n max-width: 760px;\n line-height: 1.8;\n margin-bottom: 40px;\n }\n\n \/* \u2500\u2500 Overview \u2500\u2500 *\/\n .overview {\n padding: 80px 0;\n background: #F8F9FB;\n }\n\n .overview-grid {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 28px;\n }\n\n .overview-card {\n background: var(--bg);\n padding: 36px 28px;\n border-radius: 10px;\n border: 1px solid var(--border);\n transition: all 0.3s ease;\n }\n\n .overview-card:hover {\n transform: translateY(-4px);\n box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);\n }\n\n .overview-icon {\n width: 48px;\n height: 48px;\n background: linear-gradient(135deg, var(--accent), var(--accent-light));\n border-radius: 10px;\n display: flex;\n align-items: center;\n justify-content: center;\n margin-bottom: 20px;\n }\n\n .overview-icon svg {\n width: 24px;\n height: 24px;\n fill: var(--primary);\n }\n\n .overview-card h3 {\n font-size: 1.1rem;\n font-weight: 600;\n color: var(--primary);\n margin-bottom: 10px;\n }\n\n .overview-card p {\n font-size: 0.95rem;\n color: var(--text-light);\n line-height: 1.7;\n }\n\n \/* \u2500\u2500 Specifications \u2500\u2500 *\/\n .specifications {\n padding: 80px 0;\n background: var(--bg);\n }\n\n .spec-table {\n width: 100%;\n border-collapse: collapse;\n font-size: 0.92rem;\n }\n\n .spec-table th,\n .spec-table td {\n padding: 14px 16px;\n text-align: left;\n border: 1px solid var(--border);\n }\n\n .spec-table thead tr { background: #f1f3f6; }\n\n .spec-table th {\n font-weight: 700;\n color: var(--primary);\n font-size: 0.88rem;\n letter-spacing: 0.3px;\n }\n\n .spec-table tbody tr:nth-child(even) { background: var(--bg-alt); }\n\n .spec-table tbody td { color: var(--text-light); }\n\n .spec-table tbody td:first-child {\n font-weight: 600;\n color: var(--primary);\n }\n\n \/* \u2500\u2500 Principle \u2500\u2500 *\/\n .principle {\n padding: 80px 0;\n background: var(--bg-dark);\n color: #ffffff;\n }\n\n .principle .section-title { color: #ffffff; }\n .principle .section-desc { color: #8a9bb0; }\n\n .steps-grid {\n display: grid;\n grid-template-columns: repeat(4, 1fr);\n gap: 24px;\n margin-top: 48px;\n }\n\n .step-card {\n background: rgba(255, 255, 255, 0.03);\n border: 1px solid rgba(255, 255, 255, 0.08);\n border-radius: 10px;\n padding: 32px 24px;\n position: relative;\n }\n\n .step-number {\n font-size: 3rem;\n font-weight: 800;\n color: var(--accent);\n opacity: 0.3;\n line-height: 1;\n margin-bottom: 16px;\n }\n\n .step-card h3 {\n font-size: 1.05rem;\n font-weight: 600;\n margin-bottom: 10px;\n color: #ffffff;\n }\n\n .step-card p {\n font-size: 0.9rem;\n color: #7a8fa3;\n line-height: 1.7;\n }\n\n \/* \u2500\u2500 Materials \u2500\u2500 *\/\n .materials {\n padding: 80px 0;\n background: var(--bg-alt);\n }\n\n .material-cards {\n display: grid;\n grid-template-columns: repeat(4, 1fr);\n gap: 20px;\n margin-top: 40px;\n }\n\n .material-card {\n border: 1px solid var(--border);\n border-radius: 10px;\n overflow: hidden;\n background: var(--bg);\n transition: all 0.3s ease;\n }\n\n .material-card:hover {\n border-color: var(--accent);\n box-shadow: 0 8px 28px rgba(200, 169, 81, 0.08);\n transform: translateY(-3px);\n }\n\n .material-card-image {\n width: 100%;\n aspect-ratio: 4\/3;\n overflow: hidden;\n position: relative;\n }\n\n .material-card-title {\n padding: 14px 16px;\n font-size: 0.92rem;\n font-weight: 600;\n color: var(--primary);\n text-align: center;\n }\n\n \/* \u2500\u2500 Applications \u2500\u2500 *\/\n .applications {\n padding: 80px 0;\n background: #F8F9FB;\n }\n\n .app-grid {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 24px;\n }\n\n .app-item {\n display: flex;\n align-items: flex-start;\n gap: 16px;\n padding: 24px;\n background: var(--bg);\n border-radius: 10px;\n border: 1px solid var(--border);\n }\n\n .app-dot {\n width: 10px;\n height: 10px;\n background: var(--accent);\n border-radius: 50%;\n margin-top: 6px;\n flex-shrink: 0;\n }\n\n .app-item h4 {\n font-size: 1rem;\n font-weight: 600;\n color: var(--primary);\n margin-bottom: 4px;\n }\n\n .app-item p {\n font-size: 0.9rem;\n color: var(--text-light);\n line-height: 1.6;\n }\n\n \/* \u2500\u2500 Advantages \u2500\u2500 *\/\n .advantages {\n padding: 80px 0;\n background: var(--bg);\n }\n\n .adv-grid {\n display: grid;\n grid-template-columns: repeat(2, 1fr);\n gap: 32px;\n }\n\n .adv-item {\n display: flex;\n gap: 20px;\n align-items: flex-start;\n }\n\n .adv-number {\n width: 40px;\n height: 40px;\n min-width: 40px;\n background: var(--primary);\n color: var(--accent);\n border-radius: 8px;\n display: flex;\n align-items: center;\n justify-content: center;\n font-weight: 700;\n font-size: 0.9rem;\n }\n\n .adv-content h4 {\n font-size: 1.05rem;\n font-weight: 600;\n color: var(--primary);\n margin-bottom: 6px;\n }\n\n .adv-content p {\n font-size: 0.92rem;\n color: var(--text-light);\n line-height: 1.7;\n }\n\n \/* \u2500\u2500 Scenarios \u2500\u2500 *\/\n .scenarios {\n padding: 80px 0;\n background: var(--bg-dark);\n color: #ffffff;\n }\n\n .scenarios .section-label { color: var(--accent); }\n .scenarios .section-title { color: #ffffff; }\n .scenarios .section-desc { color: #8a9bb0; }\n\n .scenarios-grid {\n display: grid;\n grid-template-columns: repeat(4, 1fr);\n gap: 24px;\n margin-top: 48px;\n }\n\n .scenario-card {\n background: rgba(255, 255, 255, 0.03);\n border: 1px solid rgba(255, 255, 255, 0.08);\n border-radius: 10px;\n overflow: hidden;\n transition: all 0.3s ease;\n }\n\n .scenario-card:hover {\n border-color: rgba(200, 169, 81, 0.35);\n background: rgba(200, 169, 81, 0.04);\n transform: translateY(-4px);\n }\n\n .scenario-card-image {\n width: 100%;\n aspect-ratio: 4\/3;\n overflow: hidden;\n position: relative;\n }\n\n .scenario-card-body { padding: 20px 20px 24px; }\n\n .scenario-card h3 {\n font-size: 0.98rem;\n font-weight: 600;\n color: #ffffff;\n margin-bottom: 8px;\n }\n\n .scenario-card p {\n font-size: 0.88rem;\n color: #7a8fa3;\n line-height: 1.7;\n }\n\n \/* \u2500\u2500 FAQ \u2500\u2500 *\/\n .faq {\n padding: 80px 0 100px;\n background: var(--bg);\n }\n\n .faq-item {\n border-bottom: 1px solid var(--border);\n padding: 28px 0;\n }\n\n .faq-item:first-child { padding-top: 0; }\n\n .faq-item h3 {\n font-size: 1.05rem;\n font-weight: 600;\n color: var(--primary);\n margin-bottom: 10px;\n }\n\n .faq-item p {\n font-size: 0.95rem;\n color: var(--text-light);\n line-height: 1.8;\n }\n\n \/* \u2500\u2500 Responsive \u2500\u2500 *\/\n @media (max-width: 1024px) {\n .hero-content { grid-template-columns: 1fr; gap: 40px; }\n .metrics-grid { grid-template-columns: repeat(2, 1fr); }\n .overview-grid { grid-template-columns: repeat(2, 1fr); }\n .steps-grid { grid-template-columns: repeat(2, 1fr); }\n .scenarios-grid { grid-template-columns: repeat(2, 1fr); }\n .material-cards { grid-template-columns: repeat(4, 1fr); }\n }\n\n @media (max-width: 768px) {\n .hero { padding: 60px 0 50px; overflow: hidden; }\n .hero-badge { margin-top: 8px; }\n .hero h1 { font-size: 2rem; }\n .hero h1 .hero-title-accent { white-space: normal; }\n .hero-desc { max-width: 100%; }\n .metrics-grid { grid-template-columns: 1fr 1fr; gap: 16px; }\n .overview-grid { grid-template-columns: 1fr; }\n .app-grid { grid-template-columns: 1fr; }\n .adv-grid { grid-template-columns: 1fr; }\n .steps-grid { grid-template-columns: 1fr; }\n .scenarios-grid { grid-template-columns: 1fr; }\n .material-cards { grid-template-columns: repeat(2, 1fr); }\n .section-title { font-size: 1.6rem; }\n }\n <\/style>\n<\/head>\n<body>\n <main id=\"main-content\">\n <article>\n\n <!-- \u2550\u2550\u2550 HERO \u2550\u2550\u2550 -->\n <section class=\"hero\" aria-labelledby=\"hero-heading\">\n <div class=\"container\">\n <div class=\"hero-content\">\n <div class=\"hero-text\">\n <div class=\"hero-badge\">Quad-Shaft Industrial Secondary Shredder<\/div>\n <h1 id=\"hero-heading\"><span class=\"hero-title-main\">Four-Shaft Shredder<\/span> <span class=\"hero-title-accent\">Uniform Output<\/span><\/h1>\n <p class=\"hero-desc\">A precision industrial shredder built around two stacked pairs of counter-rotating cutter shafts and an integrated bottom screen \u2014 delivering fine, guaranteed-uniform particle output for plastic recycling, e-waste processing, confidential document destruction, SRF\/RDF preparation, and secondary size reduction where output quality is non-negotiable.<\/p>\n <\/div>\n <div class=\"hero-image\">\n <div class=\"hero-image-placeholder\" role=\"img\" aria-label=\"Four-shaft shredder\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/four-shaft-shredder.png\" alt=\"Four-Shaft Shredder \u2014 Industrial Quad-Shaft Shredder\" style=\"width:100%;height:100%;object-fit:cover;border-radius:12px;display:block;\">\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/section>\n\n <!-- \u2550\u2550\u2550 METRICS \u2550\u2550\u2550 -->\n <section class=\"metrics\" aria-label=\"Key performance indicators\">\n <div class=\"container\">\n <div class=\"metrics-grid\">\n <div class=\"metric-card\">\n <div class=\"metric-value\">15\u201380 <span>mm<\/span><\/div>\n <div class=\"metric-label\">Screen-Controlled Output Size<\/div>\n <\/div>\n <div class=\"metric-card\">\n <div class=\"metric-value\">15\u2013400 <span>kW<\/span><\/div>\n <div class=\"metric-label\">Total Installed Drive Power<\/div>\n <\/div>\n <div class=\"metric-card\">\n <div class=\"metric-value\">4 <span>shafts<\/span><\/div>\n <div class=\"metric-label\">Dual-Stage Recirculating Cut<\/div>\n <\/div>\n <div class=\"metric-card\">\n <div class=\"metric-value\">15\u201360 <span>RPM<\/span><\/div>\n <div class=\"metric-label\">Low-Speed High-Torque Drive<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/section>\n\n <!-- \u2550\u2550\u2550 OVERVIEW \u2550\u2550\u2550 -->\n <section class=\"overview\" aria-labelledby=\"overview-heading\">\n <div class=\"container\">\n <div class=\"section-label\">Product Overview<\/div>\n <h2 id=\"overview-heading\" class=\"section-title\">Why Processors Specify a Four-Shaft Shredder<\/h2>\n <p class=\"section-desc\">When downstream processes demand uniform, screen-controlled particle size \u2014 optical sorters, air classifiers, washing lines, SRF\/RDF caloric consistency, or certified security destruction \u2014 the four-shaft shredder is the industry benchmark. Its two stacked cutter pairs and integrated bottom screen guarantee that every particle exiting the machine meets the specified size target, with no oversized fraction requiring re-runs.<\/p>\n <div class=\"overview-grid\">\n <div class=\"overview-card\">\n <div class=\"overview-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M4 8h4V4H4v4zm6 12h4v-4h-4v4zm-6 0h4v-4H4v4zm0-6h4v-4H4v4zm6 0h4v-4h-4v4zm6-10v4h4V4h-4zm-6 4h4V4h-4v4zm6 6h4v-4h-4v4zm0 6h4v-4h-4v4z\"\/><\/svg>\n <\/div>\n <h3>Dual-Stage Cutter Architecture<\/h3>\n <p>Two pairs of counter-rotating shafts are stacked vertically. The upper pair performs the primary tear; the lower pair intercepts oversized particles and re-shreds them back into the cutting zone \u2014 creating a self-contained recirculating reduction cycle.<\/p>\n <\/div>\n <div class=\"overview-card\">\n <div class=\"overview-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M20 4H4c-1.1 0-2 .9-2 2v12c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2zm-8 2.5c1.24 0 2.25 1.01 2.25 2.25S13.24 11 12 11s-2.25-1.01-2.25-2.25S10.76 6.5 12 6.5zM17 17H7v-1c0-1.67 3.33-2.5 5-2.5s5 .83 5 2.5v1z\"\/><\/svg>\n <\/div>\n <h3>Integrated Bottom Screen<\/h3>\n <p>A swappable perforated screen beneath all four shafts controls the maximum output particle size. Only particles below the aperture pass through; all others are recirculated for further reduction \u2014 delivering 100% on-spec output, every pass.<\/p>\n <\/div>\n <div class=\"overview-card\">\n <div class=\"overview-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M12 1L3 5v6c0 5.55 3.84 10.74 10 12 6.16-1.26 10-6.45 10-12V5l-9-4z\"\/><\/svg>\n <\/div>\n <h3>Guaranteed Uniform Particle Output<\/h3>\n <p>Unlike twin-shaft shredders that produce a wide distribution of coarse strips, the four-shaft machine eliminates oversized fractions at source. Downstream sorters, washing lines, and fuel-preparation processes receive consistent, predictable input.<\/p>\n <\/div>\n <div class=\"overview-card\">\n <div class=\"overview-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M19.43 12.98c.04-.32.07-.64.07-.98s-.03-.66-.07-.98l2.11-1.65a.5.5 0 00.12-.64l-2-3.46a.5.5 0 00-.61-.22l-2.49 1a7.03 7.03 0 00-1.69-.98l-.38-2.65A.488.488 0 0014 2h-4a.488.488 0 00-.49.42l-.38 2.65c-.61.25-1.17.59-1.69.98l-2.49-1a.5.5 0 00-.61.22l-2 3.46a.5.5 0 00.12.64l2.11 1.65c-.04.32-.07.65-.07.98s.03.66.07.98l-2.11 1.65a.5.5 0 00-.12.64l2 3.46a.5.5 0 00.61.22l2.49-1c.52.4 1.08.73 1.69.98l.38 2.65c.06.24.27.42.49.42h4c.22 0 .43-.18.49-.42l.38-2.65c.61-.25 1.17-.59 1.69-.98l2.49 1a.5.5 0 00.61-.22l2-3.46a.5.5 0 00-.12-.64l-2.11-1.65zM12 15.5a3.5 3.5 0 110-7 3.5 3.5 0 010 7z\"\/><\/svg>\n <\/div>\n <h3>Interchangeable Screen & Cutters<\/h3>\n <p>Swapping the bottom screen changes the output size target in minutes \u2014 no mechanical reconfiguration needed. Cutter discs on all four shafts are individually bolted and can be rotated, resharpened, or replaced one at a time without shaft removal.<\/p>\n <\/div>\n <div class=\"overview-card\">\n <div class=\"overview-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M14 2H6a2 2 0 00-2 2v16a2 2 0 002 2h12a2 2 0 002-2V8l-6-6zM6 20V4h7v5h5v11H6z\"\/><\/svg>\n <\/div>\n <h3>PLC Auto-Reverse on All Four Drives<\/h3>\n <p>The integrated PLC monitors motor amperage and gearbox load on all four independent drives simultaneously. Any overload triggers automatic shaft reversal to clear the jam, then resumes forward operation \u2014 minimizing unplanned stops and protecting all four gearboxes.<\/p>\n <\/div>\n <div class=\"overview-card\">\n <div class=\"overview-icon\">\n <svg viewBox=\"0 0 24 24\"><path d=\"M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-2 15l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z\"\/><\/svg>\n <\/div>\n <h3>Certified Destruction Compliance<\/h3>\n <p>With a 15\u201325 mm screen fitted, the four-shaft shredder meets DIN 66399 and equivalent security-destruction standards for paper, hard drives, optical media, ID documents, currency, and pharmaceutical products \u2014 providing auditable, certified particle-size compliance.<\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/section>\n\n <!-- \u2550\u2550\u2550 SPECIFICATIONS \u2550\u2550\u2550 -->\n <section class=\"specifications\" id=\"specifications\" aria-labelledby=\"spec-heading\">\n <div class=\"container\">\n <div class=\"section-label\">Technical Data<\/div>\n <h2 id=\"spec-heading\" class=\"section-title\">Representative Specifications<\/h2>\n <p class=\"section-desc\">The figures below represent typical configuration ranges for industrial four-shaft shredders deployed in plastic recycling, e-waste processing, document destruction, SRF\/RDF preparation, and secondary size reduction. Final specifications depend on feedstock type, target output size, required throughput, and downstream process requirements.<\/p>\n <div style=\"overflow-x:auto;\">\n <table class=\"spec-table\">\n <thead>\n <tr>\n <th scope=\"col\">Model<\/th>\n <th scope=\"col\">Rotor Count<\/th>\n <th scope=\"col\">Cutter Count<\/th>\n <th scope=\"col\">Motor Power<\/th>\n <th scope=\"col\">Screen Size<\/th>\n <th scope=\"col\">Capacity<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr>\n <td>ARZIR FS-800<\/td>\n <td>4 synchronized shafts<\/td>\n <td>160 pieces<\/td>\n <td>500 kW<\/td>\n <td>10\u201380 mm<\/td>\n <td>3\u201310 t\/h<\/td>\n <\/tr>\n <tr>\n <td>ARZIR FS-1200<\/td>\n <td>4 synchronized shafts<\/td>\n <td>200 pieces<\/td>\n <td>750 kW<\/td>\n <td>15\u2013100 mm<\/td>\n <td>8\u201320 t\/h<\/td>\n <\/tr>\n <tr>\n <td>ARZIR FS-1600<\/td>\n <td>4 synchronized shafts<\/td>\n <td>240 pieces<\/td>\n <td>1000 kW<\/td>\n <td>20\u2013120 mm<\/td>\n <td>15\u201330 t\/h<\/td>\n <\/tr>\n <tr>\n <td>ARZIR FS-2000<\/td>\n <td>4 synchronized shafts<\/td>\n <td>280 pieces<\/td>\n <td>1500 kW<\/td>\n <td>25\u2013150 mm<\/td>\n <td>25\u201340 t\/h<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n <\/div>\n <\/section>\n\n <!-- \u2550\u2550\u2550 PRINCIPLE \u2550\u2550\u2550 -->\n <section class=\"principle\" aria-labelledby=\"principle-heading\">\n <div class=\"container\">\n <div class=\"section-label\">Operating Cycle<\/div>\n <h2 id=\"principle-heading\" class=\"section-title\">How a Four-Shaft Shredder Works<\/h2>\n <p class=\"section-desc\">The four-shaft shredder runs a continuous two-stage recirculating reduction cycle. Material fed in at the top passes through two counter-rotating cutter pairs before reaching the bottom screen \u2014 and anything that does not meet the aperture requirement is automatically returned to the cutting zone until it does.<\/p>\n <div class=\"steps-grid\">\n <div class=\"step-card\">\n <div class=\"step-number\">01<\/div>\n <h3>Feed Loading<\/h3>\n <p>Pre-shredded or light feedstock is loaded into the hopper by conveyor, grab, or direct feed. The open hopper geometry guides material onto the upper shaft pair \u2014 no ram, no metering required for most feedstocks.<\/p>\n <\/div>\n <div class=\"step-card\">\n <div class=\"step-number\">02<\/div>\n <h3>Upper Pair Primary Cut<\/h3>\n <p>The first pair of counter-rotating shafts grips and shears the feedstock, performing the initial size reduction. Particles small enough to pass the gap between shafts fall toward the lower cutting zone.<\/p>\n <\/div>\n <div class=\"step-card\">\n <div class=\"step-number\">03<\/div>\n <h3>Lower Pair Re-Shred & Screen<\/h3>\n <p>The lower shaft pair intercepts all particles above the screen aperture and re-shears them. Only material conforming to the specified maximum size passes through the bottom screen \u2014 oversized pieces are continuously recirculated.<\/p>\n <\/div>\n <div class=\"step-card\">\n <div class=\"step-number\">04<\/div>\n <h3>Uniform Discharge & PLC Control<\/h3>\n <p>On-spec particles exit through the screen directly onto a discharge conveyor below. The PLC monitors all four drives simultaneously; on any overload it auto-reverses all shafts to clear jams, then resumes \u2014 typically without operator intervention.<\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/section>\n\n <!-- \u2550\u2550\u2550 MATERIALS \u2550\u2550\u2550 -->\n <section class=\"materials\" aria-labelledby=\"materials-heading\">\n <div class=\"container\">\n <div class=\"section-label\">Feedstock<\/div>\n <h2 id=\"materials-heading\" class=\"section-title\">Materials Processed by a Four-Shaft Shredder<\/h2>\n <p class=\"section-desc\">The four-shaft shredder excels at secondary size reduction of light-to-medium fraction waste where uniform output quality governs the downstream process \u2014 from plastics and e-waste to paper archives, packaging, and SRF\/RDF fuel fractions.<\/p>\n <div class=\"material-cards\">\n <div class=\"material-card\">\n <div class=\"material-card-image\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/Rigid-Film-Plastics.jpg\" alt=\"Rigid & Film Plastics\" style=\"width:100%;height:100%;object-fit:cover;display:block;\">\n <\/div>\n <div class=\"material-card-title\">Rigid & Film Plastics<\/div>\n <\/div>\n <div class=\"material-card\">\n <div class=\"material-card-image\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/E-Waste-Processing-Centers-1.jpg\" alt=\"E-Waste & Hard Drives\" style=\"width:100%;height:100%;object-fit:cover;display:block;\">\n <\/div>\n <div class=\"material-card-title\">E-Waste & Hard Drives<\/div>\n <\/div>\n <div class=\"material-card\">\n <div class=\"material-card-image\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/Paper-Confidential-Documents.jpg\" alt=\"Paper & Confidential Documents\" style=\"width:100%;height:100%;object-fit:cover;display:block;\">\n <\/div>\n <div class=\"material-card-title\">Paper & Confidential Documents<\/div>\n <\/div>\n <div class=\"material-card\">\n <div class=\"material-card-image\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/Cardboard-Paper-Bales.jpg\" alt=\"Cardboard & Paper Bales\" style=\"width:100%;height:100%;object-fit:cover;display:block;\">\n <\/div>\n <div class=\"material-card-title\">Cardboard & Paper Bales<\/div>\n <\/div>\n <div class=\"material-card\">\n <div class=\"material-card-image\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/Plastic-Bottles-PET-HDPE.jpg\" alt=\"Plastic Bottles & PET\/HDPE\" style=\"width:100%;height:100%;object-fit:cover;display:block;\">\n <\/div>\n <div class=\"material-card-title\">Plastic Bottles & PET\/HDPE<\/div>\n <\/div>\n <div class=\"material-card\">\n <div class=\"material-card-image\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/SRF-RDF-Fractions.jpg\" alt=\"SRF \/ RDF Fractions\" style=\"width:100%;height:100%;object-fit:cover;display:block;\">\n <\/div>\n <div class=\"material-card-title\">SRF \/ RDF Fractions<\/div>\n <\/div>\n <div class=\"material-card\">\n <div class=\"material-card-image\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/Optical-Media-ID-Cards.jpg\" alt=\"Optical Media & ID Cards\" style=\"width:100%;height:100%;object-fit:cover;display:block;\">\n <\/div>\n <div class=\"material-card-title\">Optical Media & ID Cards<\/div>\n <\/div>\n <div class=\"material-card\">\n <div class=\"material-card-image\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/Light-Non-Ferrous-Scrap.jpg\" alt=\"Light Non-Ferrous Scrap\" style=\"width:100%;height:100%;object-fit:cover;display:block;\">\n <\/div>\n <div class=\"material-card-title\">Light Non-Ferrous Scrap<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/section>\n\n <!-- \u2550\u2550\u2550 APPLICATIONS \u2550\u2550\u2550 -->\n <section class=\"applications\" aria-labelledby=\"applications-heading\">\n <div class=\"container\">\n <div class=\"section-label\">Competitive Comparison<\/div>\n <h2 id=\"applications-heading\" class=\"section-title\">Why Choose ARZIR Four-Shaft Shredders<\/h2>\n <p class=\"section-desc\">See how ARZIR four-shaft shredders compare against conventional double-shaft machines across the metrics that matter most \u2014 material recovery, output uniformity, processing stages, and long-term return on investment.<\/p>\n <div style=\"overflow-x:auto; margin-top: 40px;\">\n <table style=\"width:100%; border-collapse:collapse; font-size:0.92rem;\">\n <thead>\n <tr>\n <th style=\"padding:14px 16px; text-align:left; font-weight:700; color:var(--primary); font-size:0.88rem; letter-spacing:0.3px; background:#f1f3f6;\">Comparison Item<\/th>\n <th style=\"padding:14px 16px; text-align:left; font-weight:700; color:var(--primary); font-size:0.88rem; letter-spacing:0.3px; background:#f1f3f6;\">ARZIR Four-Shaft<\/th>\n <th style=\"padding:14px 16px; text-align:left; font-weight:700; color:var(--primary); font-size:0.88rem; letter-spacing:0.3px; background:#f1f3f6;\">Double-Shaft Shredder<\/th>\n <th style=\"padding:14px 16px; text-align:left; font-weight:700; color:var(--primary); font-size:0.88rem; letter-spacing:0.3px; background:#f1f3f6;\">ARZIR Advantage<\/th>\n <\/tr>\n <\/thead>\n <tbody>\n <tr style=\"border-top: 2px solid var(--border);\">\n <td style=\"padding:14px 16px; font-weight:600; color:var(--primary);\">Material Liberation Rate<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">90\u201395% superior liberation<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">75\u201385% standard liberation<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">15\u201320% higher material recovery<\/td>\n <\/tr>\n <tr style=\"background:var(--bg-alt);\">\n <td style=\"padding:14px 16px; font-weight:600; color:var(--primary);\">Output Uniformity<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">95%+ uniform particle distribution<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">80\u201390% output consistency<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">Superior downstream processing efficiency<\/td>\n <\/tr>\n <tr>\n <td style=\"padding:14px 16px; font-weight:600; color:var(--primary);\">Processing Stages<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">Single-pass coarse to fine processing<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">Primary reduction requires secondary processing<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">Eliminates multiple processing stages<\/td>\n <\/tr>\n <tr style=\"background:var(--bg-alt);\">\n <td style=\"padding:14px 16px; font-weight:600; color:var(--primary);\">Fine Material Handling<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">Specialized for fine and precision processing<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">Optimized for primary size reduction<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">Superior fine processing capabilities<\/td>\n <\/tr>\n <tr>\n <td style=\"padding:14px 16px; font-weight:600; color:var(--primary);\">Material Contamination Control<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">Progressive separation maintains purity<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">Good separation with some mixing<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">Higher purity recovered materials<\/td>\n <\/tr>\n <tr style=\"background:var(--bg-alt);\">\n <td style=\"padding:14px 16px; font-weight:600; color:var(--primary);\">Investment Requirements<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">Higher investment for advanced capabilities<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">Lower initial investment cost<\/td>\n <td style=\"padding:14px 16px; color:var(--text-light);\">ROI through superior material recovery<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n <\/div>\n <\/section>\n\n <!-- \u2550\u2550\u2550 SCENARIOS \u2550\u2550\u2550 -->\n <section class=\"scenarios\" aria-labelledby=\"scenarios-heading\">\n <div class=\"container\">\n <div class=\"section-label\">Use Cases<\/div>\n <h2 id=\"scenarios-heading\" class=\"section-title\">Application Scenarios<\/h2>\n <p class=\"section-desc\">Four-shaft shredders occupy the secondary position in size-reduction lines \u2014 downstream of a primary twin-shaft shredder and upstream of sorters, washing systems, or fuel-preparation conveyors \u2014 where their screen-controlled output quality is the critical enabling factor.<\/p>\n <div class=\"scenarios-grid\">\n <div class=\"scenario-card\">\n <div class=\"scenario-card-image\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/E-Waste-Processing-Centers-1.jpg\" alt=\"E-Waste Processing Centers\" style=\"width:100%;height:100%;object-fit:cover;display:block;\">\n <\/div>\n <div class=\"scenario-card-body\">\n <h3>E-Waste Processing Centers<\/h3>\n <p>Secondary fine shredding of pre-processed electronics, PCBs, mobile phones, and hard drives into uniform flakes that maximize metal liberation and recovery in downstream optical and eddy-current sorters.<\/p>\n <\/div>\n <\/div>\n <div class=\"scenario-card\">\n <div class=\"scenario-card-image\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/Automotive-Shredder-Residue-1.jpg\" alt=\"Automotive Shredder Residue\" style=\"width:100%;height:100%;object-fit:cover;display:block;\">\n <\/div>\n <div class=\"scenario-card-body\">\n <h3>Automotive Shredder Residue<\/h3>\n <p>Fine shredding of ASR light fractions \u2014 foam, fabric, mixed plastics, and rubber \u2014 into a tight particle-size distribution that improves separation efficiency in downstream density, optical, and sensor-sorting stages.<\/p>\n <\/div>\n <\/div>\n <div class=\"scenario-card\">\n <div class=\"scenario-card-image\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/Complex-Plastic-Processing.jpg\" alt=\"Complex Plastic Processing\" style=\"width:100%;height:100%;object-fit:cover;display:block;\">\n <\/div>\n <div class=\"scenario-card-body\">\n <h3>Complex Plastic Processing<\/h3>\n <p>Producing uniform flakes from multi-layer film, rigid containers, composite packaging, and mixed polymer streams \u2014 meeting washing-line and extruder feed specifications without a separate downstream screening step.<\/p>\n <\/div>\n <\/div>\n <div class=\"scenario-card\">\n <div class=\"scenario-card-image\">\n <img decoding=\"async\" src=\"https:\/\/www.arzir.com\/wp-content\/uploads\/2026\/05\/Fine-Metal-Processing.jpg\" alt=\"Fine Metal Processing\" style=\"width:100%;height:100%;object-fit:cover;display:block;\">\n <\/div>\n <div class=\"scenario-card-body\">\n <h3>Fine Metal Processing<\/h3>\n <p>Secondary reduction of light non-ferrous scrap, aluminum foil, thin-gauge sheet, and cable offcuts into uniform pieces that improve bulk density and separation efficiency in downstream eddy-current and sensor-sorting stages.<\/p>\n <\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/section>\n\n <!-- \u2550\u2550\u2550 FAQ \u2550\u2550\u2550 -->\n <section class=\"faq\" id=\"faq\" aria-labelledby=\"faq-heading\">\n <div class=\"container\">\n <div class=\"section-label\">Knowledge Base<\/div>\n <h2 id=\"faq-heading\" class=\"section-title\">Frequently Asked Questions<\/h2>\n <div class=\"faq-list\">\n <article class=\"faq-item\">\n <h3>What is a four-shaft shredder?<\/h3>\n <p>A four-shaft shredder, also called a quad-shaft shredder, is an industrial size-reduction machine that uses two pairs of counter-rotating cutter shafts arranged in two stacked stages above an integrated bottom screen. The upper pair of shafts pre-tears the incoming feedstock; particles that are still oversized are returned by the lower pair and re-shredded until they pass through the screen aperture. This two-stage architecture delivers fine, uniform, screen-controlled output \u2014 making the four-shaft shredder the preferred choice for secondary size reduction of plastics, e-waste, paper, confidential documents, and SRF\/RDF preparation.<\/p>\n <\/article>\n <article class=\"faq-item\">\n <h3>What materials can a four-shaft shredder process?<\/h3>\n <p>Typical feedstock for a four-shaft shredder includes rigid and film plastics, plastic bottles and containers, HDPE and PET bales, electronic waste such as mobile phones, laptops, hard drives, and PCBs, confidential documents and paper archives, cardboard and paper bales, light aluminum profiles, cable offcuts, packaging waste, SRF\/RDF feed fractions, non-ferrous light scrap, pharmaceutical waste for destruction, and branded goods requiring certified IP destruction. Most four-shaft machines receive pre-shredded or relatively uniform feedstock from a primary twin-shaft shredder upstream.<\/p>\n <\/article>\n <article class=\"faq-item\">\n <h3>How does a four-shaft shredder differ from a double-shaft shredder?<\/h3>\n <p>A double-shaft shredder uses two counter-rotating shafts with no screen, producing coarse, irregular strips for primary size reduction of tough, bulky, and oversized feedstock. A four-shaft shredder adds a second pair of shafts and a bottom screen, creating a recirculating two-stage cutting cycle that re-shreds any particle too large to pass through the screen aperture. The result is fine, consistent, screen-controlled output suitable for downstream sorting, granulation, or direct fuel use \u2014 making the four-shaft shredder ideal for secondary or finish shredding, not primary reduction.<\/p>\n <\/article>\n <article class=\"faq-item\">\n <h3>What output particle size does a four-shaft shredder produce?<\/h3>\n <p>Because all output must pass through a fixed bottom screen, a four-shaft shredder guarantees a precise, upper-bound particle size. Typical screen apertures range from 15 mm to 80 mm, producing uniform flakes, strips, or granules depending on the cutter profile and feedstock. This screen-controlled output is a key advantage over double-shaft shredders \u2014 it eliminates oversized material and ensures consistent input quality for downstream optical sorters, air classifiers, washing lines, and granulators.<\/p>\n <\/article>\n <article class=\"faq-item\">\n <h3>What shaft size and motor power range is typical for a four-shaft shredder?<\/h3>\n <p>Industrial four-shaft shredders typically use shaft diameters between 150 mm and 400 mm with cutting chamber lengths between 500 mm and 2000 mm. Total installed drive power ranges from 15 kW on small document-destruction units up to 400 kW on heavy plastic and e-waste secondary shredders. Each of the four shafts is driven by its own motor-gearbox set, and rotational speed is kept low \u2014 typically 15\u201360 rpm \u2014 to maximize torque and minimize heat, dust, and noise.<\/p>\n <\/article>\n <article class=\"faq-item\">\n <h3>How does the bottom screen work in a four-shaft shredder?<\/h3>\n <p>The bottom screen in a four-shaft shredder sits directly below all four shafts. Particles small enough to pass through the screen aperture fall through and exit the machine on the discharge conveyor. Oversized particles are intercepted by the lower pair of shafts, which shear and re-tear them back up into the cutting zone between all four rotors. This recirculation continues until every piece is reduced below the screen aperture, guaranteeing 100% compliance with the specified maximum output size.<\/p>\n <\/article>\n <article class=\"faq-item\">\n <h3>Can a four-shaft shredder handle confidential document and data destruction?<\/h3>\n <p>Yes. The four-shaft shredder is widely used for certified confidential destruction of paper archives, hard drives, optical media, ID cards, currency, and branded or pharmaceutical products. The combination of a tight screen aperture (typically 15\u201325 mm for document destruction) and the recirculating two-stage cutting cycle ensures that no piece exits the machine above the certified destruction particle size \u2014 meeting DIN 66399 or equivalent security-level standards when the correct screen is fitted.<\/p>\n <\/article>\n <article class=\"faq-item\">\n <h3>Are the cutters on a four-shaft shredder replaceable?<\/h3>\n <p>Yes. Four-shaft shredders use individually bolted cutter discs and spacers on all four shafts. Each cutter can be removed, rotated to a fresh cutting edge, or replaced independently without dismounting the shafts. The bottom screen is also interchangeable \u2014 different aperture screens can be swapped to change the output particle size target for different products or campaigns. This modularity makes the four-shaft machine highly flexible and keeps wear-part downtime low.<\/p>\n <\/article>\n <article class=\"faq-item\">\n <h3>How does a four-shaft shredder protect itself from overload?<\/h3>\n <p>An integrated PLC continuously monitors the motor amperage and gearbox load on all four drives. On overload, the controller automatically reverses all shafts to clear any jammed or unshredable material, then resumes forward operation \u2014 typically without operator intervention. Torque-limiting couplings or shear pins provide final mechanical overload protection for gearboxes and shaft bearings on extreme shock loads. Four-shaft shredders are generally operated downstream of a primary shredder that removes the most damaging contraries.<\/p>\n <\/article>\n <article class=\"faq-item\">\n <h3>What maintenance does a four-shaft shredder require?<\/h3>\n <p>Routine maintenance includes daily visual inspection of the cutting chamber and screen condition, regular cutter rotation or replacement based on hourly wear data, screen aperture inspection for deformation, gearbox oil sampling on all four gearboxes, shaft bearing lubrication, PLC and drive system checks, and inspection of discharge conveyor components. Following manufacturer-recommended service intervals by shaft run-hours maximizes cutter and screen life, minimizes unplanned downtime, and protects the gearboxes and bearings on all four drive units.<\/p>\n <\/article>\n <\/div>\n <\/div>\n <\/section>\n\n <\/article>\n <\/main>\n<\/body>\n<\/html>\n\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n <meta charset=\"UTF-8\">\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n <title>Request a Quote \u2014 ARZIR Industrial Equipment<\/title>\n\n <link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n <link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n <link href=\"https:\/\/fonts.googleapis.com\/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@500;600;700&display=swap\" rel=\"stylesheet\">\n\n <style>\n *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }\n\n html, body {\n margin: 0;\n padding: 0;\n }\n\n :root {\n 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competitive quote within 24 hours.<\/p>\n <ul class=\"cta-points\">\n <li class=\"cta-point\">\n <span class=\"cta-point-icon\">\n <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.5\"><path d=\"M12 6v6h4.5m4.5 0a9 9 0 11-18 0 9 9 0 0118 0z\"\/><\/svg>\n <\/span>\n <span>Response within 24 hours<\/span>\n <\/li>\n <li class=\"cta-point\">\n <span class=\"cta-point-icon\">\n <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.5\"><path d=\"M9 12h3.75M9 15h3m-6.75 4.5h12a2.25 2.25 0 002.25-2.25V6.75a2.25 2.25 0 00-2.25-2.25H4.5A2.25 2.25 0 002.25 6.75v12a2.25 2.25 0 002.25 2.25z\"\/><\/svg>\n <\/span>\n <span>Free technical consultation & quotation<\/span>\n <\/li>\n <li class=\"cta-point\">\n <span class=\"cta-point-icon\">\n <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.5\"><path d=\"M9 12.75L11.25 15 15 9.75m-3-7.036A11.959 11.959 0 013.598 6 11.99 11.99 0 003 9.749c0 5.592 3.824 10.29 9 11.623 5.176-1.332 9-6.03 9-11.622 0-1.31-.21-2.571-.598-3.751h-.152c-3.196 0-6.1-1.248-8.25-3.285z\"\/><\/svg>\n <\/span>\n <span>ISO-certified factory & strict quality control<\/span>\n <\/li>\n <li class=\"cta-point\">\n <span class=\"cta-point-icon\">\n <svg viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"1.5\"><path d=\"M12 21a9.004 9.004 0 008.716-6.747M12 21a9.004 9.004 0 01-8.716-6.747M12 21c2.485 0 4.5-4.03 4.5-9S14.485 3 12 3m0 18c-2.485 0-4.5-4.03-4.5-9S9.515 3 12 3\"\/><\/svg>\n <\/span>\n <span>Shipped to 100+ countries worldwide<\/span>\n <\/li>\n <\/ul>\n <\/div>\n <div class=\"cta-form-card fade-in\">\n \t\t<div data-elementor-type=\"container\" data-elementor-id=\"29076\" class=\"elementor elementor-29076\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t<div class=\"wd-negative-gap elementor-element elementor-element-735539c e-flex e-con-boxed e-con e-parent\" data-id=\"735539c\" data-element_type=\"container\" 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type=\"hidden\" name=\"queried_id\" value=\"29183\"\/>\n\t\t\t\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-above\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-customer_name elementor-col-50 elementor-field-required elementor-mark-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-customer_name\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tName\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[customer_name]\" id=\"form-field-customer_name\" class=\"elementor-field elementor-size-sm elementor-field-textual\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-email elementor-field-group elementor-column elementor-field-group-customer_email elementor-col-50 elementor-field-required elementor-mark-required\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-customer_email\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tEmail\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"email\" name=\"form_fields[customer_email]\" id=\"form-field-customer_email\" class=\"elementor-field elementor-size-sm elementor-field-textual\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-text elementor-field-group elementor-column elementor-field-group-company_name elementor-col-50\">\n\t\t\t\t\t\t\t\t\t\t\t\t<label for=\"form-field-company_name\" class=\"elementor-field-label\">\n\t\t\t\t\t\t\t\tCompany\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"text\" name=\"form_fields[company_name]\" id=\"form-field-company_name\" class=\"elementor-field elementor-size-sm elementor-field-textual\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-tel elementor-field-group elementor-column elementor-field-group-customer_whatsapp 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class=\"elementor-button-text\">Submit Inquiry<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/form>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\n <\/div>\n <\/div>\n <\/div>\n <\/section>\n\n <script>\n document.addEventListener('DOMContentLoaded', function () {\n var fadeEls = document.querySelectorAll('.fade-in');\n if ('IntersectionObserver' in window) {\n var observer = new IntersectionObserver(function (entries) {\n entries.forEach(function (entry) {\n if (entry.isIntersecting) {\n entry.target.classList.add('visible');\n observer.unobserve(entry.target);\n }\n });\n }, { threshold: 0.1 });\n fadeEls.forEach(function (el) { observer.observe(el); });\n } else {\n fadeEls.forEach(function (el) { el.classList.add('visible'); });\n }\n });\n <\/script>\n\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"<p>Four-Shaft Shredder | Industrial Quad-Shaft Shredder for Uniform Fine Output \u2014 Plastic, E-Waste, Paper & Confidential Destruction Quad-Shaft Industrial 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