Crushing knives

Crushing knives and shredder knives from KN Knives are replacement rotor and counter knives for single-shaft shredders and industrial crushers that reduce plastic, wood, pallets and mixed recycling material – including concave rotor knives (cutting crowns), block knives and long counter knives. We have been manufacturing industrial machine knives in Slovenia since 1996 – every knife is CNC-machined, heat-treated and precision-ground in our own production, under ISO 9001:2015.

Shredder knives for Weima, Vecoplan, Lindner, Untha and more

Knives for Weima, Vecoplan, Lindner, Untha, Zerma, MTB, Mewa, Wagner, Weiss, Zeno, Reinbold, Gross, Robust and NGR machines. Filter by brand, purpose, industry, hardness or material – every knife shows its dimensions, a technical drawing and, where available, a 3D model.

Steel and hardness

• 1.2379 / K110 – high wear resistance, the standard for most rotor knives.
• 1.2360 / K329, 1.2343 – tougher steels for wood with nails and mixed waste.
• 1.7131 – case-hardening steel with a tough core and hard surface.
• Carbide (15 % Co) – for very abrasive materials.

Hardened to 52–62 HRc, depending on the knife and the material being shredded.

Machine brand names are trademarks of their owners and are used only to identify the machines our knives fit.