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Industrial Knives for Recycling

SIKNIVES for Recycling Industry

Industrial knives and wear parts for shredding, granulating and scrap metal recycling

SIKNIVES for Recycling Industry from SIJ Ravne Systems are industrial knives and wear parts for shredding, granulating and scrap metal recycling, made in different steels, hardness levels and executions.

Manufactured bySIJ Ravne Systems
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Triangular steel shredder knife with central slot and mounting holes on a blue background
SIKNIVES shredding knife.
30+ yearsRecycling industry experience
Up to 3×DURALIFE V+ knife lifetime
4 rangesShredding · Granulating · Scrap · Wear parts
ISO 9001Also ISO 14001 and ISO 45001
Overview

Knives and wear parts for recycling machines

SIKNIVES are industrial knives and wear parts made by SIJ Ravne Systems for recycling applications. The range covers knives for shredding, granulating and scrap metal recycling, together with related wear and spare parts.

The knives process municipal and industrial waste, RDF material, WEEE, tires, plastics, paper, cables, aluminum, copper, pulp, biomass, rubber, wood, pallets, medical waste, oil filters, textiles and batteries.

With more than 30 years of experience in the recycling industry, SIJ Ravne Systems customizes steels, hardness levels, heat treatments and executions to the machine type and the material processed, and supplies knives, holders, screens and fasteners from one source.

Product Range

Knives by recycling process

Close-up of toothed steel knives with pointed cutting teeth

Shredding knives

For shredders from Lindner, Vecoplan, MTB, Untha, Weima, Andritz Mewa, Precimeca, Amni, Granutech, BMH and Columbus McKinnon.

  • Rotor knives / rotor blades.
  • Shredding cutters / concave cutters.
  • Counter knives and circular shredding knives.
  • Spacers, cleaning sectors and hammers.
Two straight granulator knives with slotted mounting holes on a blue background

Granulating knives

For granulators from Herbold, Zerma, Previero, Tria, Cumberland, Guidetti, Folcieri, Profing, Wanner, STF, Piovan, Getecha and Erema.

  • Granulator rotor knives / fly knives.
  • Granulator static knives / bed knives.
  • Pelletizer knives.
Group of scrap shear knives and wear plates with mounting holes

Scrap metal recycling knives

For scrap cutting machines from Lefort, Lindemann, Taurus, LaBounty and Bonfiglioli.

  • Scrap shear and scrap chopper knives.
  • Knives for alligator, baler and demolition shears.
  • Shim plates and wear plates.

Wear and spare parts

  • Knife holders, with or without hard-facing.
  • Bolts, nuts and washers, DIN and non-standard.
  • Punched, laser-cut and drilled screens in Hardox, St 52 or hard-faced.
  • Wear plates, wear rings, rotors and welded constructions.
Configurations

Knife grades and executions

Granulator knives

DURALIFE V+

  • For problems with lifetime, throughput or cracking.
  • Lifetime up to 3 times longer than conventional knives.
  • Up to 3 times less re-grinding and service cost.
  • Less knife chipping.
Granulator knives

RAVMAX

For problems with the toughness of knives.

Executions

  • Through-hardened.
  • Case-hardened.
  • Nitrided.
  • Cemented.
  • Hard-faced.
Applications

Where SIKNIVES for recycling are used

Close-up of toothed steel knives with pointed cutting teeth

Shredding and volume reduction

Rotor, counter and circular knives for shredders in recycling plants.

Two straight granulator knives with slotted mounting holes on a blue background

Granulate production

Rotor and bed knives for plastic and PET granulators.

Group of scrap shear knives and wear plates with mounting holes

Scrap metal recycling

Shear knives for ferrous and non-ferrous metal and cast iron scrap.

RDF production

Knives for shredding municipal and industrial waste into RDF.

Tire and cable recycling

Knives for processing tires, rubber and cables.

Municipal solid wasteIndustrial wasteWEEE recyclingPlastic recyclingPET recyclingPaper recyclingAluminum recyclingCopper recyclingBiomass recyclingWood and pallet shreddingMedical wasteOil filter recyclingTextile recyclingBattery recyclingRecycling centers
Features

Steel, heat treatment and machine fit

Knife range

  • Knives for shredding, granulating and scrap metal recycling.
  • Complete package of wear and spare parts.
  • Custom-made to machine type and application.
  • Suitable for OEM replacement and process-optimized knife solutions.

Materials and heat treatment

  • Made from high-quality steels in different grades.
  • Different hardness levels.
  • Heat treatment in vacuum by knife specialists.
  • Through-hardened, case-hardened, nitrided, cemented or hard-faced.

Machine fit

  • Compatible with shredders, granulators and scrap shears of major global manufacturers.
  • Suitable for heavy-duty recycling environments.
  • Suitable for municipal, industrial waste and RDF processing.
Benefits

Why SIKNIVES for recycling

Less downtime. Reduces machine downtime and improves productivity.
Lower tooling cost. Lowers tooling and maintenance costs and extends knife lifetime.
Cleaner granulate. Helps produce cleaner, more consistent granulate with less dust, noise and vibration.
Matched steel. Custom steel selection matches knife toughness and hardness to the application.
Vacuum heat treatment. Vacuum heat treatment improves knife performance.
One supplier. Knives, holders, screens, fasteners and wear parts from one supplier.

Need support with these recycling knives?

Share your machine make and model, knife type and drawings, material processed and current knife lifetime, and our Performance Engineering team will support you with the suitable product information.

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