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In heavy-duty recycling operations, "chipping" is the leading cause of premature blade failure. While D2 steel is the industry standard, DC53 single shaft shredder blades offer a significant upgrade in durability, especially when processing materials with minor metal contaminants or high-impact plastic waste.
For shredder rotor knives, DC53 provides:
Higher Hardness: After heat treatment, DC53 reaches 60-62 HRC, maintaining a sharper edge for longer durations.
Double the Toughness: DC53 has twice the toughness of D2, drastically reducing the risk of "chipping" or "cracking" during high-impact shredding.
Superior Fatigue Resistance: Ideal for industrial shredding where constant vibration can cause lesser steels to fail.
NAME | SIZE | Material |
Single-shaft shredder blade size | 25x25x20/M12 | D2/DC-53 |
28x28x23 M12 | ||
30x30x20 M12 | ||
30x30x25 M12 | ||
34x34x20 M12 | ||
35x35x23 M12/M14 | ||
| 40x40x20 M12 | ||
40x40x23 M12 | ||
40x40x25 M12/M14 | ||
40x40x28 M14 | ||
45x45x30/M16 | ||
46x46x32 M16/M18 | ||
46x46x35 M16/M18 | ||
50x50x30 M16 | ||
60x60x30 M16 | ||
60x60x35 M16/M18 | ||
70x70x42/M20 | ||
70x70x45/M20 | ||
70x70x50/M20 | ||
80x80x35/M24 | ||
80x80x45/M24 | ||
25x25x20/M12 | ||
28x28x23 M12 | ||
30x30x20 M12 | ||
30x30x25 M12 | ||
34x34x20 M12 | ||
35x35x23 M12/M14 | ||
40x40x20 M12 | ||
40x40x23 M12 |
Single-shaft shredder blades are the key part of single-shaft shredders.
They cut and tear different kinds of waste materials.
Uses: Crushing and recycling plastics, wood, rubber, cables, light metals, paper fibers, etc.
Their performance affects the shredder’s work speed and output accuracy.
Made of high-wear alloy steel (precision-machined) – balances durability and cutting stability.
Good wear resistance (great for abrasive materials).
Hardness: HRC 58-60.
Stable structure and strong resistance to shear friction (good for continuous wear work).
Less tough and more brittle than DC53 – easy to chip (especially when processing materials with impurities).
Best for: Highly abrasive materials (e.g., hard plastic with fillers) if chipping risk is acceptable.
High hardness and toughness.
Key advantages: Good impact resistance and balanced wear resistance (best for heavy, complex work).
Toughness: About twice that of D2 – hard to chip or crack (safe for mixed/impure materials).
Hardness: HRC 62-63 (higher than D2) – better wear resistance.
Best for: Heavy continuous shredding (needs both toughness and wear resistance), e.g., mixed materials, PVC, rubber, tires, thick plastic sheets, light metals.
Blades are fixed to the blade holder (on the rotating main shaft) via a central hole.
Works with the fixed blade (on the machine body) to cut materials efficiently (using the main shaft’s torque).
Pros: Strong gripping ability, high cutting efficiency, easy to maintain.
High blade density, fine cutting.
Suitable for soft materials (e.g., plastic films, woven bags).
Output size: 20-25mm (for small/medium precision shredders).
Balances efficiency and versatility.
Handles solid blocks, waste cardboard, plastic bottles, rubber products.
Output size: 25-40mm (for most regular single-shaft shredders).
High strength, good impact resistance (uses D2/DC53 alloy).
Processes large, hard materials (e.g., wood, tires, thick plastic sheets, metal cans).
Output size: ≥50mm (needs high-power equipment).
Central hole types: Convex and flat (fits different blade holder needs).
Ensures blade stability during high-speed rotation and cutting (safe and stable operation).
Some blades have inward-cutting edges (optimizes gap with fixed blade, improves cutting accuracy).
Blanking & Forging: Choose high-quality alloy steel blanks, cut and forge them. Improves internal structure, toughness and strength (prevents breakage).
DC53: Quenched to HRC 62-63 (maximizes toughness and wear resistance).
D2: Multi-step heat treatment to HRC 58-60 (enhances wear resistance).
Eliminates internal stress (balances hardness and toughness, prevents chipping).
Precision Machining: Use CNC machines, wire cutting and precision grinding. Ensures size accuracy, flatness and sharpness (good gap with blade holder/fixed blade, better cutting stability).
Quality Control: Full inspection for each batch (hardness, size accuracy, surface defects). Ensures consistency and reliability (meets industrial continuous operation needs).
Regularly clean material residue on the blade surface.
Check for wear (extends blade life).
Single shaft shredder blades
Single shaft shredder knives
40x40 shredder blades
dc-53 shredder blades
Nanjing Alas International Co., Ltd. is a professional industrial tooling manufacturer focused on shear blades, bending dies, shredder blades, and custom wear parts. We offer full application engineering, material selection, setup guidance, and after-sales support to global customers.
Tell us your requirements, and our engineering team will provide professional solutions for blade specification, tool life optimization, and cost-effective production.