What are the common shredder blades and how to choose them


Common types of shredder blades

According to the structure of the shredder classification, shredder blades can be divided into single-shaft shredder blades, multi-shaft shredder blades (including double-shaft shredder blades and four-shaft shredder blades).

In terms of material, the common materials of shredder blades are high-speed steel, carbide cutting tools, PCD, synthetic diamond, coated blades and so on. In addition, there are D2, SKD-11, Cr12MoV, 6CrW2Si, 9CrSi, 60Si2Mo, T10 and other materials.

单轴撕碎机刀片座 单轴撕碎机旋转刀片 单轴撕碎机固定刀片
Shredder blade holders Shredding motorized knives Shredder fixed blade

Difference between blades made of different materials

High Speed Steel (HSS): Shredder knives made of HSS have excellent characteristics such as wear resistance, heat resistance and corrosion resistance. Its high hardness, can withstand high-speed cutting and heavy load work, suitable for processing difficult to process non-metallic materials, plastics, rubber and so on. The main material composition of high-speed steel is carbon, chromium, tungsten, cobalt, molybdenum and other elements, these elements make high-speed steel has high hardness and toughness.

Alloy Steel: Alloy steel is a steel with alloying elements added on the basis of general carbon steel to improve the mechanical and chemical properties of steel. Shredder knives made of alloy steel have high hardness, good toughness, and are not easy to deform, and are suitable for cutting materials with high hardness and good abrasion resistance, such as metal materials and hard plastics.

Cemented carbide: Cemented carbide, also known as carbide steel, is made of tungsten, cobalt, titanium, niobium, zirconium and other high melting point metal powders mixed with carbide powders and so on in accordance with a certain ratio. The shredder knife made of cemented carbide has high hardness, good abrasion resistance and is not easy to deform, which is suitable for processing hard materials and non-metallic materials.

9CrSi, Cr12MoV, SKD-11: These materials belong to alloy tool steel or cold work die steel. 9CrSi has high hardness and wear resistance, but brittle, suitable for rubber, fiber, paper and other materials such as softer waste. Cr12MoV and SKD-11, on the other hand, have stronger abrasion and impact resistance, and are suitable for shredding wood, waste furniture, hard plastics and so on.


How to determine what kind of blade you need

Material Characterization:
Determine material type (metal, plastic, wood, etc.) and hardness, and analyze physical properties of material such as density and toughness.

Processing Requirements:
Determine processing goals (efficiency, accuracy, cost) and evaluate processing volume (material handled per hour or per day).

Blade type and material:
Select the appropriate blade type (straight edge, serrated, etc.) according to the material and processing needs, and select the blade material (high-speed steel, carbide, etc.) that suits the hardness of the material.

Cost Effectiveness:
Consider the initial purchase cost, service life and maintenance cost of the blade, and choose a cost-effective blade.

Benefits of choosing the right shredder blade

Improve work efficiency: the right blade can cut the material more quickly and reduce processing time, thus improving the work efficiency of the shredder.

Reduce energy consumption: the matching blade design can reduce the resistance in the cutting process, so that the motor and transmission system to complete the work with less energy consumption, reduce operating costs.

Extend the life of the equipment: the appropriate blade can reduce the burden on the equipment, reduce mechanical wear and tear and failure rate, thus extending the service life of the shredder.

Improve cutting quality: High-quality blades can provide more stable and precise cutting effect, reduce material blockage and residue, and improve product quality.

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