The combined shredder blade features a modular design that enables rapid cutter head disassembly and individual blade replacement without removing the entire shaft assembly. Unlike traditional integrated blade sets where a single damaged blade forces complete rotor overhaul, this removable assembling system isolates wear to individual cutting segments. When one blade encounters extreme impact or abrasive conditions, operators can replace only the affected unit in minutes rather than hours. This modular architecture significantly reduces downtime, lowers long-term consumable costs, and extends overall rotor service life. The design has gained widespread adoption across plastic recycling, tire processing, and metal shredding operations where blade wear rates vary by material zone.

The quality and installation accuracy of the shredder blade, as its core component, directly determine the effectiveness and lifespan of the shredder. A professional spiral installation method is required, and the blade is separated in the middle by a spacer to reduce wear and ensure stability. The thickness of the blade is usually controlled between 0.2 and 0.3 millimeters, which can ensure the strength of the blade and effectively prevent collisions during operation. The specific thickness and number of teeth selection depend on the size of the shredder product and the expected shredding effect.

With the development and innovation of the blade industry, the quality of the raw materials of the blade is increasing. The shredder blades are commonly used in a variety of materials, and the materials are generally selected according to different processing objects:

Common materials used in the plastic industry are 42CrMo, W5SiCr, SKD-11;
Common materials used in the metal industry are: 6CrW2Si, Cr12Mov, LD, H13;
Common materials used in the wood industry are: 5WSiCr, 6CrW2Si, SKH, SKD-11, D2;
The heat treatment reached HRC 55-57.

According to the material of the shredder shredded product, choose the appropriate blade. For rubber, the shredding of the film generally adopts the blade of Cr12mov. For the shredding of wood and plastic, the blade of 55sicr is generally used, shredded scrap, popped flower and flower iron. A blade using H13 is suitable because H13 is a hot work die steel which is a steel formed by adding alloying elements to carbon steel. It has good comprehensive performance at medium temperature, high hardenability and low heat treatment deformation rate, high-temperature resistance, and low deformation. Therefore, it is more suitable for shredding metal products.

Commonly used twin-shaft shredder blades. The inner hole is generally an inner hexagon, and the outer circumference commonly has three claws, six claws, eight claws, and twelve claws. The number of jaws, the clearance and the distance from the blade to the spacer determine the size of the shredded material. Generally, the shredder blades are available in diameters from 200mm to 500mm and thicknesses from 20mm to 55mm. They can also be customized according to customer needs.

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