Metal shredding | © UNTHA shredding technology GmbH


Metal shredding is a necessary step in the recycling process, independent of whether your scrap metal comes from the metal-processing industry, the automotive industry, the electrical industry or the waste industry. Whatever your needs, we have the right shredding system for your recyclable materials!

Scrap steel against climate change

Recycling steel doesn’t just save billions in environment- and climate-related costs: Replacing the primary material with scrap saves millions of tonnes of CO2 emissions. This is not reflected in the price yet, but in future, consumers and politicians should be given the clear message that scrap minimises the use of raw materials, reduces environment-related costs and thus actively contributes towards climate protection.


What shredders are best suited for shredding metal?

There is no general answer to this question, as not every metal is the same. The right shredder will therefore depend on the shape, hardness and ultimate purpose of the metal recycling process. From reducing the metal volume in order to facilitate further processing in the smelting works to improved separation of varying metals and composites, we will always analyse your requirements together with you and determine the right unit with regard to input material, throughput and desired size of the granulate. The question of whether a single-shaft or four-shaft shredder is the best choice for your material also needs to be addressed.


Single-phase shredding of metal

The stationary or the mobile XR shredder is particularly suitable for the single-phase processing of metals and scraps. Minimum operating costs combined with maximum performance make the shredders of the XR series powerful partners for metal recycling. The single-phase shredding process makes this unit particularly efficient and economical to operate.


Your benefits when using the XR shredder

  • Lower transportation costs thanks to increased bulk density of the material
  • Perfect preparation for further processing thanks to defined fraction size
  • Excellent material breakdown for a high degree of purity
  • Straightforward processing of different types of metal
  • High level of plant availability as the cutting chamber is easy to clean before the input material is changed
  • Low energy cost and minimal noise and dust emissions thanks to UNTHA Eco Power Drive


Still not convinced of the benefits of the XR shredders? Then test one with your metal scrap directly at your facility.

Ask for a trial run now.


Metal- and scrap-shredding with a four-shaft shredder for defined grain size

A four-shaft metal shredder is used when defined and homogeneous granulate sizes of less than 200mm are required. Depending on the individual model, the four-shaft shredders of the RS series are used for metal turning and milling chips, for breaking down compound products, for shredding rejects, separating precious metals, scrap aluminium and light scrap steel.   

Thanks to its compact design, the unit is easy to integrate into existing plants.


What materials may be shredded on a single unit?

Wear and tear of the cutting system is particularly important when it comes to shredding scrap – the harder the metal, the more pronounced the wear and tear.  In principle, light metals as well as harder metals up to a certain wall thickness may be shredded efficiently.  This includes metals and alloys such as:

  • Aluminium
  • Magnesium
  • Al-Mg alloys
  • Copper
  • Nickel
  • Iron
  • Zirconium
  • Titanium
  • Steel plates up to a maximum thickness of 2mm

Product enquiry


Sheet metal waste is a valuable resource! Ideally, it is shredded by our sturdy rotary shears and recycled. Capitalize on our large selection of different shredding machines. We will always provide you with customized size reduction solutions that are adjusted specifically to your needs.

Shredding metal drums – whole, compressed, with or without content – is always beneficial. To be able to efficiently and reliably shred the metal drums, you will need particularly sturdy and durable shredding systems. With our powerful slow-speed 2-shaft and 4-shaft shredding machines you will have no trouble accomplishing this task. 

Metal bands, wires, and cables are a special challenge for shredding machines. Not every shredder is capable of meeting this challenge. UNTHA rotary shears are especially sturdy and were designed specifically for difficult applications.

Shredding sprues or runners from pressure die casting can be performed directly at the machine or decentralised at an in-house collection point. Recycling saves transport and storage costs. We offer customized metal shredding solutions especially designed for your specific application case.

The material must be pre-shredded to be able to efficiently recycle aluminium waste into high-quality casting and wrought alloy (sheet plate, profiles, shates, sheets, liquid aluminium, ingots, sows, ...).

We offer reliable and powerful aluminium can shredder as well as recycling solutions that are well suited for pre-shredding aluminium waste.

Metal shavings, bands, wires, and cables are a special challenge for shredding machines. Not every shredder is capable of meeting this challenge.

Our industrial metal shaving shredders are especially sturdy and were designed specifically for difficult applications. We can help you to reduce the volume of your metal swarfs to a minimum and reduce your disposal costs by increasing your dumping volume.

Punching scrap consists of hard abrasive materials. You will need reliable cutting units with a long service life to be able to economically shred these types of materials. Our four-shaft technology has proven itself well here a thousand times over.

Recommended shredding machines


RS30-40 Shredder
Power [kW]: 11 - 44
Cutting chamber width [mm]: 450/750/1000


RS50-100 Industrial shredder
Power [kW]: 44 - 150
Cutting chamber width [mm]: - 1.500


RS150 heavy duty industrial shredder  | UNTHA
Power [kW]: 180 - 312
Cutting chamber width [mm]: 1.500


Static waste shredder RDF SRF | XR3000
Power [kW]: 65 - 264
Cutting chamber width [mm]: 1.960/2.960

XR mobil-e

Power [kW]: 113 - 264
Cutting chamber width [mm]: 2.960


S25 Compact universal shredder | UNTHA
Power [kW]: 7,5
Cutting chamber width [mm]: 430


S120 Shredder | UNTHA
Power [kW]: 88
Cutting chamber width [mm]: 1.378