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SR Shredders

Secondary shredder 
Powerful 
Low maintenance

High-performance secondary shredding for alternative fuel production

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Technical specifications

  • kW
    Driving power
  • mm
    Fraction sizes
  • mm
    Rotor diameter
  • t/h
    Maximum throughput capacity

Meet our most powerful secondary shredder, perfect for processing pre-treated materials to produce high-quality substitute fuels. With its proven XC cutting system and generous screen area, it delivers fine, homogeneous particles at a throughput of up to 20 t/h.

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Key Features

  • The XC cutting system is central to the SR shredder’s exceptional output quality, purpose-built for processing pre-treated or iron-separated materials from municipal, commercial, industrial, and plastic waste streams.

    Welded, wear-resistant blade holders bring high resistance to contaminants, and the absence of a secondary cutting bar keeps maintenance requirements to a minimum. Plus, since both rotor and stator blades are able to be reused up to four times, the machine brings a significantly longer service life with greater cost per tonne.

  • The newly developed FlowGuide controls material flow inside the cutting chamber, preventing premature overflow and reducing dwell time. The result is a consistently stable, uniform output – exactly what RDF production demands.

  • The SR shredder’s beltless direct drive with planetary gearbox and maintenance-free safety clutch eliminates tensioning mechanisms, shaft stubs, and flywheels. With fewer wear-prone components comes fewer interventions, keeping downtime to a minimum.

UNBEATABLE BENEFITS

Engineered for secondary shredding that never stops.

Pusher-free operation

The SR shredder's self-feeding mechanism reduces mechanical complexity and the associated maintenance, while keeping material flowing consistently into the cutting chamber.

Unmatched rotor performance

Combining low speeds with the largest rotor diameter available for secondary shredders, the SR delivers exceptional torque, reliable intake, and reduced wear on cutting components.

Defined particle output

Quick-change screens produce precisely defined output fractions between 10 and 60 mm, providing a high-quality material for thermal recovery in alternative fuel production.

Maximum machine availability

With minimal wear-prone components, robust rotor balancing weights inside the body, and an efficient direct drive, the SR shredder runs continuously with minimal downtime.

Intuitive rotor cooling

Our patented rotor cooling system stabilises temperatures and reduces steam formation when processing heat-sensitive materials, protecting output quality and machine internals alike.

Real-time machine data

Through the MyUNTHA platform, operators can view detailed information on maintenance cycles and identity and order spare parts directly through the integrated 3D catalogue.

What the SR can shred

A high-performance secondary shredder, the SR Class processes pre-shredded, screened material – with ferrous and non-ferrous metals removed – transforming complex waste streams into homogeneous feedstock for the main burner.

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Municipal solid waste

Household and mixed residual waste following metal separation.
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Commercial and industrial waste (C&I)

Diverse residues born from trade and manufacturing operations.
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Plastic waste streams

Films, rigid packaging, and mixed post-consumer plastics.
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SRF/RDF fractions

Recovered fuel materials destined for further size reduction.
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Production waste

Process offcuts and residues generated during manufacturing.
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Bulky waste

Large and difficult refuse, such as mattresses and pulper ropes.

Flexible financing for every shredder

UNTHA Finance helps you get any shredder into operation without large upfront costs. Flexible payment plans and tailored financing options let you optimise cash flow, scale operations, and start shredding efficiently from day one.

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SR Class FAQs

If you still can’t find the answer you’re looking for, reach out to our customer support team  – we’re happy to help.

  • The SR2000XC and SR3000XC feature the largest rotor diameter on the market at 1,000 mm, combined with a low rotational speed, pusher-free self-feeding operation, and the FlowGuide material flow system. Together, these deliver higher throughput, more homogeneous output, and significantly lower wear costs than competing secondary shredder designs.

  • The SR is designed for pre-shredded, screened material with ferrous and non-ferrous metals removed – including municipal solid waste fractions, commercial and industrial waste, plastic waste streams, and SRF/RDF pre-processed fractions. It is not intended for primary shredding of unprocessed waste. If you need help shaping an end-to-end solution, talk with our experts.

  • Depending on the screen selected, the SR produces a precisely defined output between 10 and 60 mm. The hydraulic quick-change screen system allows segments or cassettes to be swapped easily by a single operator without extended downtime.

  • The outward-opening maintenance door gives direct access to the cutting chamber, and rotor balancing weights are housed inside the rotor – making them completely wear free. Real-time machine data, maintenance scheduling, and spare parts identification are all available via the MyUNTHA customer platform too, putting total control at your fingertips.

  • Both SR models use the beltless UNTHA Power Drive with a planetary gearbox and maintenance-free safety clutch. By eliminating belt tensioning, shaft stubs, and flywheels, the number of wear-prone components is significantly reduced, which directly translates to lower maintenance requirements and higher overall plant availability.

  • UNTHA Finance offers flexible procurement packages including hire purchase, finance lease, operating lease, contract hire, and asset refinance. Whether you want to own the equipment long term or prefer a fully managed solution with servicing included, there's a structure to suit your operation and cashflow needs.

Request a quote

Tell us about the materials you need to process, your throughput requirements, and any site-specific considerations. Our experts will review your needs and recommend the most suitable shredding solution, helping you improve efficiency, reduce waste, and get the best performance from your equipment.

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