SHREDDER BLADES

The main materials used for the production of shredder knives are hardened tool die steels and high-speed steels. These steels undergo specific heat treatment directly before sharpening, which significantly increases the wear resistance of this type of knife against abrasion, impact and other mechanical loads. Wear resistance can also be improved by applying special coatings such as titanium nitride.

However, it should not be forgotten that regardless of the quality of the materials used and the sharpening, knives are a consumable item and a spare set of knives is required for continuity of the working cycle.

The output fraction depends on the type of shredder — coarse (100+ mm), medium (25–100 mm) or fine crushing (1–25 mm), as well as the size of the fraction screen.

Shredders can shred almost any material regardless of thickness: metal, railway sleepers, wood, furniture, paper, thick-walled plastic, municipal solid waste, PET containers, glass waste, cable and virtually all existing types of hard and soft waste. Equipment will differ for different materials. There are certain general requirements that apply to all types of crushing machines: high blade hardness; wear-resistant knife edge; low weight; simple and quick removal and installation of knives; long service life.

Knives are made from high-strength alloyed or carbon steel. The choice of alloy depends on the conditions in which the equipment will be used and the cutting surface of the raw material being processed.

The best option when working with heavy impact loads are knives made from tool alloy steel grades 6KhS, 9KhS, 6KhV2S, 65G, 40Kh, U8A, U10A, Kh12MF, D2, SKD11. Hardness from 38 to 60 HRC. Hardening 57…64 HRC. This type of steel extends the service life of the product.

High-quality knives for crushers and shredders are the primary condition for efficient and uninterrupted operation of recycling equipment.