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Home Recycling Blades Shredder Blocks
  • Wear-resistant cutting block for industrial shredder machine waste material crushing operations
  • Industrial blocks for material shredding
  • Durable components for shredding machines
  • Heavy-duty blocks used in shredding systems
Non-Standard Shredder Blades

Shredder Blocks

Shredder blocks are critical wear components used in industrial shredders for size reduction of tough materials such as scrap metal, plastics, rubber, wood, and electronic waste. These blocks are mounted in the shredder housing and work in conjunction with rotating knives or hammers to break down materials into smaller, manageable pieces.
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Customized sizes are available, according to your drawing or sample.

  • Fully Custom
  • Expedited Production Processing

Shredder blocks are stationary wear components installed in the housing of single-shaft, dual-shaft, and quad-shaft industrial shredders. They work in tandem with rotating knives or hammers to shear, tear, and fracture input materials—ranging from scrap metal and plastics to rubber, wood, and electronic waste—into uniform output sizes. YISHI Machinery manufactures custom shredder blocks from high-alloy tool steels such as D2, H13, and M2, vacuum heat-treated to HRC 58–62 for maximum abrasion resistance and impact toughness. Each block is precision-ground to tight tolerances, ensuring consistent clearance with the rotor and extended service life in demanding recycling and size-reduction operations.

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  • Scrap Metal Recycling
  • Plastics Recycling
  • Wood Waste Processing
  • E-Waste Recycling
  • Tire Recycling
  • Scrap Metal Recycling

    Used in hammer mill and shear shredders to break down aluminum profiles, copper wire, and light-gauge steel scrap into furnace-ready chips.

  • Plastics Recycling

    Installed in single-shaft shredders for size reduction of HDPE drums, PVC pipes, and nylon purgings before granulation.

  • Wood Waste Processing

    Mounted in wood chippers and pallet shredders to fracture hardwoods, MDF, and particleboard into biomass fuel or mulch.

  • E-Waste Recycling

    Employed in dual-shaft shredders to liberate components from printed circuit boards, hard drives, and mixed electronic assemblies.

  • Tire Recycling

    Integrated into primary shredders for reducing whole passenger and truck tires to 50–100 mm chips, withstanding high-impact loads.

Technical Specifications

Dimensions Length 50–800 mm, width 30–300 mm, thickness 10–100 mm. Bolt-hole diameters and counterbore depths per customer specification.
Materials D2 (Cr12MoV), H13 (SKD61), M2, 9CrSi, tungsten carbide (inserts)
Hardness HRC 58–62 for tool steels; HRA 89–92 for carbide
Tolerances ±0.01 mm on critical mounting surfaces; ±0.05 mm on non-critical dimensions
Surface Finish Ra 0.8–1.6 µm on ground surfaces; as-forged or milled finish available for non-contact areas
Customisation Manufactured to customer drawings, 3D models, or OEM part numbers. Reverse engineering from samples available. Bolt patterns, counterbores, and edge profiles fully customisable.

Why Choose Yishi

YISHI Machinery operates an in-house vacuum heat treatment facility with digital process control, ensuring batch-to-batch hardness consistency within ±1 HRC. All shredder blocks are CNC-ground on 5-axis machines, achieving flatness within 0.02 mm. Material certificates are provided with each shipment, and we maintain a library of over 2,000 custom blade geometries for repeat orders. Lead times for custom blocks average 15–20 working days from drawing approval, with no minimum order quantity.

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Frequently Asked Questions

  • What steel grade is best for shredder blocks processing scrap metal?

    For scrap metal with moderate abrasion, D2 (Cr12MoV) at HRC 58–60 offers an optimal balance of wear resistance and toughness. For high-impact loads, such as shredding thick steel sections, H13 (SKD61) at HRC 50–54 provides greater shock resistance. Our engineers can recommend the grade based on your feedstock analysis.

  • Can you manufacture shredder blocks to fit my existing shredder model?

    Yes. We produce blocks to match OEM specifications for brands such as Vecoplan, Weima, Lindner, Untha, and SSI. Provide the machine model, serial number, or a sample block, and we will replicate the geometry and mounting pattern.

  • What is the typical service life of a shredder block?

    Service life depends on material processed, throughput, and maintenance practices. Under normal conditions processing post-consumer plastics, blocks in D2 steel can last 600–1,200 operating hours before requiring resurfacing or replacement. Regular gap adjustment extends life.

  • Do you offer regrinding or reconditioning services?

    We do not offer regrinding services directly, but we can advise on acceptable wear limits and provide replacement blocks when the wear land exceeds 3–5 mm. Some customers choose to resurface blocks locally using our original hardness specifications.

  • What information do you need to provide a quotation?

    Please supply a dimensional drawing with tolerances, material preference, quantity, and any surface coating requirements. If a drawing is not available, send a sample block or the shredder model and part number, and we will create a manufacturing drawing for your approval.

  • Are your shredder blocks compatible with both single-shaft and dual-shaft shredders?

    Yes. We manufacture stationary blocks for single-shaft, dual-shaft, and quad-shaft shredders. The design—such as the number of cutting edges, bolt pattern, and thickness—is tailored to the specific machine type and rotor configuration.

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