Your advantages at a glance
- Rugged and compact construction
- High availability and process stability
- High resistance to foreign objects
- Low maintenance

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RS30-40 Shredder

Reliable shredding solution for recycling applications and data destruction

The UNTHA four-shaft industrial shredders of the RS30/40 series have been tested and proven over several decades and were specifically designed for a broad range of applications. The shredders can be operated as stand-alone machines or integrated into complex systems, where they are favored, thanks to their very compact design.

The high reliability of the small RS series is a result of the machine's rugged cast-iron frame and sturdy cutting unit. The low-speed four-shaft shredders are not sensitive to foreign objects and require very low maintenance. Thanks to the pull-in mechanism the shredder does not need a hydraulic pusher system, which further reduces the need for maintenance. The low speed of the cutting shafts ensures low noise and dust emissions in your operations.

The machines are particularly productive thanks to the high torque in combination with a large perforated screen surface and are a favorite for multi-shift operations. In the event that foreign objects are encountered, the shredder automatically shuts down, preventing greater damage to the cutting unit. The shredder is additionally equipped with an automatic reverse to prevent motor overload.

A maintenance-free sealing system prevents dust and dirt from entering the bearings and gears. A central lubrication system provides lubrication for all essential bearings thereby ensuring long service life.

These universal shredders can also be equipped with additional separating and conveyor technology, customized hoppers and substructures, and control options. We offer comprehensive solutions from one source!


Small RS series applications:

  • Files
  • Dashboards
  • Automobile interior lining
  • Plastic films
  • Rubber waste
  • Cardboard boxes
  • Cardboard tubes
  • Plastic drums
  • Plastic containers
  • Leather
  • Metal shavings
  • Paper
  • Plastic bottles
  • Production waste
  • Foam board
  • Punching scrap
  • Car bumpers
  • Aseptic packaging
  • Textiles
  • Packing materials

Do you need more power? 
Click here for the RS50-100
Click here for the RS150

More details available below in the downloads section

Four-shaft shredding system

As the innovator of the four-shaft cutting system (patent no. 319535), we have improved these products continuously and adapted them for new markets and applications. Due to their rugged design and high productivity, four-shaft shredders are often used for difficult to shred materials. Thanks to the unique design, both initial and final shredding occurs in just one step.

Reference: Lager 3000 Oliver Riemer (Managing Director)

"Our new file destruction system is very flexible in regards to the output material and the various security levels.”

Test center

TIP: Test your material at the UNTHA test center Do you want to be 100% certain that you get the best UNTHA shredder for your application and material? No problem! We will be happy to help you test your material in our facilities under real-life conditions!

Test center


We are also happy to provide infeed and discharge conveyor belts. These will be optimally adapted to the on-site conditions and the desired throughput performance of the shredder.

A ram device supports the shredder when processing bulky material. At the same time the ram device increases the machine's throughput.

The central lubrication system supplies all important bearing points with sufficient lubricant which results in a considerable reduction of maintenance effort for the operating personnel and of machine downtimes.

We are able to adapt the hopper exactly to your needs depending on the infeed. Regardless of whether you need a particularly wide hopper for a wheel bearing infeed or a hopper with flip-top lid. We offer customized solutions.