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Recycling Blades

Turn waste into consistent output—without frequent stoppages, edge chipping, or uneven particle size. YISHI supplies recycling blades and machine knives engineered for harsh, contaminated feedstock across plastic, rubber, paper, cable, and mixed waste processing.

Recycling Blades We Manufacture

YISHI recycling blades are manufactured for size-reduction equipment operating in abrasive, high-impact conditions. This category covers shredder knives, granulator rotors and stators, pelletizing cutters, and scrap metal shear blades. Material grades are selected for the contamination level and wear mechanism of the feedstock: D2 (Cr12MoV) for dry, abrasive regrind; M2 high-speed steel for elevated-temperature cutting zones; and H13 or modified HSS for shock-loaded metal recycling. Standard hardness is held at HRC 58–62 after vacuum heat treatment with deep cryogenic processing where specified. Every blade is ground to a dimensional tolerance of ±0.01 mm on the cutting edge profile, ensuring consistent knife-to-knife clearance and predictable throughput between change-outs.

Vacuum Heat-Treated Tool Steels
Blades are produced from D2 (Cr12MoV), M2, H13, or SKD11, achieving HRC 58–62 with a uniform microstructure that resists micro-chipping in contaminated feed streams.
Edge Profile Tolerance ±0.01 mm
Cutting edges are CNC-ground to a profile tolerance of ±0.01 mm, maintaining the OEM-specified shear gap and preventing premature wear from uneven knife loading.
Deep Cryogenic Treatment Option
For M2 and D2 grades, a deep cryogenic cycle (-120°C) is available to transform retained austenite, improving dimensional stability and edge retention by up to 30% in dry granulation.
Multi-Stage Edge Honing
Post-grinding edge preparation removes grinding burrs and creates a controlled micro-radius, reducing the risk of edge chipping during the first hours of operation.
Full Drawing-to-Blade Manufacturing
YISHI manufactures from customer-supplied 2D drawings or sample blades. Reverse engineering includes hardness mapping, material spectrometry, and CMM dimensional verification.
Bolt Hole and Mounting Slot Accuracy
Mounting features are machined to H7 tolerance on bolt holes and ±0.02 mm on slot width, ensuring direct fit on OEM rotor seats without rework.

Take a Closer Look

Plastic Recycling (Post-Industrial & Post-Consumer)
Scrap Metal Processing
Wood and Biomass Grinding
Tire and Rubber Shredding
Film and Fiber Pelletizing

Plastic Recycling (Post-Industrial & Post-Consumer)
Granulator and shredder knives for size reduction of HDPE, PP, PET, ABS, and mixed rigid plastics. D2 blades at HRC 58–60 provide wear life in dry, abrasive regrind operations.
Scrap Metal Processing
Shear blades and shredder hammers for ferrous and non-ferrous scrap. H13 and high-toughness HSS grades resist chipping when cutting sheet metal, profiles, and castings.
Wood and Biomass Grinding
Chipper knives and hammer mill blades for pallet recycling, MDF, and green waste. M2 or tungsten carbide-tipped edges maintain sharpness through silica contamination.
Tire and Rubber Shredding
Primary and secondary shredder knives for whole tire and crumb rubber lines. Cryogenically treated D2 or HSS blades withstand the high friction and heat of rubber processing.
Film and Fiber Pelletizing
Pelletizing rotors and bed knives for strand and underwater pelletizers. Tight flatness and parallelism tolerances ensure clean cuts without smearing on LDPE, LLDPE, and PET.

Technical Specifications

Dimensions	OD 150–800 mm, ID 20–200 mm, thickness 8–80 mm for circular knives; length 100–1200 mm, width 40–200 mm, thickness 10–60 mm for straight blades. Custom dimensions by drawing.
Materials	D2 (Cr12MoV), M2, H13, SKD11, HSS, tungsten carbide (tipped or solid), 9CrSi, 55SiCr
Hardness	HRC 58–62 for D2/M2; HRC 48–52 for H13; HRA 89–92 for tungsten carbide
Tolerances	Cutting edge profile ±0.01 mm; thickness ±0.02 mm; bolt hole position ±0.05 mm; flatness 0.02 mm per 100 mm
Surface Finish	Ground cutting faces Ra 0.4–0.8 μm; mounting surfaces Ra 1.6 μm; optional PVD coatings (TiN, CrN, AlTiN) on request
Customisation	Manufactured to customer drawing, OEM part number, or physical sample. Specify material grade, hardness, edge angle, mounting pattern, and coating requirement.

Why Choose Yishi

YISHI supplies replacement recycling blades with a focus on repeatable metallurgy and dimensional accuracy. Every batch is traceable to a mill certificate for the steel grade specified. In-house vacuum heat treatment and optional cryogenic processing are performed in digitally controlled furnaces, producing a hardness variation of ±1 HRC across a blade set. Edge geometry is verified on a coordinate measuring machine against the customer-approved drawing before shipment. This process eliminates the fit-up and premature wear issues common with commodity aftermarket blades. For buyers managing multiple recycling lines, YISHI maintains an open-die forging and CNC grinding capacity that supports scheduled blanket orders with consistent lead times.

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Frequently Asked Questions

What steel grade is best for recycling blades cutting contaminated plastic?

D2 (Cr12MoV) at HRC 58–60 is the standard recommendation for post-consumer plastic with moderate contamination from dirt, glass, or metal fines. The high chromium content (11–13%) provides good abrasive wear resistance. For heavily contaminated streams, M2 high-speed steel or a powder metallurgy HSS grade may offer better edge stability. The final selection depends on the specific contaminant type and particle size.
Can YISHI match the blade dimensions from my OEM part number?

Yes. Provide the OEM part number and machine make/model, and YISHI will cross-reference the dimensions from its existing database of recycling blade specifications. If the blade is not in the database, you can supply a 2D drawing or ship a used blade for reverse engineering. Dimensional verification is performed on a CMM, and a first-article inspection report is available on request.
What is the typical lead time for a custom recycling blade order?

Lead time depends on the steel grade, order quantity, and whether a new forging die is required. Standard D2 and M2 blades in common sizes ship in 4–6 weeks. Blades requiring new tooling or specialized carbide grades may take 8–10 weeks. Rush orders are evaluated on a case-by-case basis. Request a specific delivery schedule with your RFQ.
How do I prevent edge chipping on shredder knives?

Edge chipping is typically caused by impact with tramp metal, incorrect knife-to-knife clearance, or a hardness level too high for the application. YISHI addresses this by recommending a steel grade with appropriate toughness (such as H13 for high-impact applications), applying a controlled edge hone to remove grinding stress risers, and verifying the specified shear gap during installation. If chipping persists, a material and failure analysis of the returned blade can identify the root cause.
Do you offer re-sharpening services for recycling blades?

YISHI's primary business is manufacturing new replacement blades. However, for customers with high-volume, high-value blades (such as large shredder rotors), we can evaluate re-sharpening on a case-by-case basis. The blade must be returned for inspection to confirm that sufficient material remains above the minimum service thickness and that no subsurface cracks are present.
What information do I need to provide to get a quote?

To provide an accurate quote, we need the blade drawing with dimensions and tolerances, the specified steel grade and hardness, the required quantity, and the target delivery date. If a drawing is not available, provide the machine make, model, and OEM part number, or ship a sample blade for measurement. Photos of the worn blade and a description of the processed material help in recommending material upgrades.