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Custom industrial shredder spares: single and double shaft rotor blades and precision machined shafts by Alasmachinery

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Custom Single and Double Shaft Shredder Blades & Shafts

Custom Double Shaft Shredder Blades And Shafts

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Custom Single and Double Shaft Shredder Blades & Shafts

What Are Custom Shredder Blades & Shafts?

Custom single and double shaft shredder blades & shafts are key parts for solid waste recycling machines. They control how well the machine works, how even the shredded pieces are, how much energy it uses, and how long the machine lasts.

Double shaft: Works by two opposite-rotating shafts that mesh, cut, and tear materials
Better than single-shaft machines: handles hard materials (metal, plastic, construction waste, household waste) easily

How They Work

Two shafts spin in opposite directions, with claw-shaped blades arranged in a spiral, staggered pattern
Blades grab materials quickly to stop slipping or jamming
Uses high torque to cut large, irregular materials into small, even pieces (runs slow: 5.5–10 rpm, high power)
Staggered blades work non-stop, so they’re faster than single-shaft machines

Blade Design (Simple & Easy to Maintain)

1. Customizable Blades

Claw options: 2, 3, 6, 8, 12 claws (more claws = finer pieces)
Thickness options: 10mm, 20mm, 40mm, 50mm, 75mm (thicker = stronger for hard materials)

2. Easy to Replace

Modular design: blade body + claw blade + auxiliary blade
Replace worn parts with bolts – no long downtime

3. Strong Shafts

Hexagonal or splined shafts (matches blade holes perfectly)
Even force distribution – no blade cracks or shaft damage

Blade Materials (Choose Based on Your Needs)

High Manganese Steel: Tough, resists impact. Good for municipal waste, construction waste (high sand/impurities)
9CrSi Steel: Hard, wears well, low cost. Good for soft waste (rubber, paper, fiber)
Cr12MoV/SKD-11/DC53: Very hard, resists wear/impact. Good for wood, hard plastic, metal, tires
H13 Steel: All-purpose – tough and wear-resistant. Good for heavy industrial waste

What Materials Can They Shred?

Metals: Aluminum cans, car parts, scrap steel, metal scraps
Plastics/E-waste: Plastic bags, barrels, pipes, circuit boards, appliance shells
Construction Waste: Renovation waste, large waste
Organics: Old furniture, branches, dewatered kitchen waste
Special: Whole tires (reinforced blades), industrial mixed waste

Key Benefits

Long life: SKD-11/DC53 blades can be sharpened 4 times (4 usable edges each)
Stable: Low noise (<85dB), low dust, runs 24/7
Saves energy: Uses 15–30% less energy vs. standard blades

How to Maintain

Sharpen blades when worn to keep them sharp
Check and adjust blade gaps regularly (too big = poor results)
Replace blades if chipped, cracked, or worn out
Tighten blade bolts before/after use

How to Choose the Right Blades

Hard materials (metal, tires): Choose Cr12MoV/SKD-11
High-impact waste (construction/municipal): Choose high manganese steel
Soft waste: Choose 9CrSi
Pick modular blades + hexagonal shafts for easy maintenance
For custom blades (single or double shaft): Provide machine model, shaft size, material type, and desired particle size

Custom Single & Double Shaft Components

Single Shaft Components (Precision & Speed)

Single-shaft shredder blades are the core part of single-shaft shredders. They cut and tear different wastes, such as plastics, wood, rubber, cables, light metals and paper fibers. Their quality directly affects how fast the machine works and how precise the output is. They are made of high-wear alloy steel, balancing durability and cutting stability.

Single-shaft Shredder Blade Materials: D2 and DC53 Alloys

D2 and DC53 are high-hardness alloys commonly used for single-shaft shredder blades, ideal for heavy work. Their key features and differences are simple:

D2 Alloy:

Wears very well, great for materials that cause friction
Hardness: HRC 58-60
Stable structure, resists friction and wear during continuous work
Less tough and more brittle than DC53 – easy to chip if processing materials with impurities. Good choice if you mainly process abrasive materials (like hard plastic with fillers) and can accept chipping.

DC53 Alloy:

Hard and tough – great for heavy, complex work. Main advantages: strong impact resistance and balanced wear resistance.
Twice as tough as D2, hard to chip or crack. Works well for mixed materials with impurities.
Wears better than D2, with hardness up to HRC 62-63 (higher than D2).
Good for heavy continuous work (mixed materials, PVC, rubber, tires, thick plastic, light metals).

DC53 is better for most work, especially mixed materials, materials with impurities, or work needing impact resistance. It balances toughness, hardness and wear resistance, reducing downtime from chipping and extending blade life. It’s an upgraded alternative to D2, suitable for more heavy-duty work.

Single-Shaft Shredder Blade Design

Structure & How It Works

Blades are fixed to the rotating main shaft’s holder via a central hole. They work with the machine’s fixed blade to crush materials using the shaft’s torque. Easy to maintain, with strong gripping and cutting ability.

Shape & Size

Most are small square blades. Main sizes: 40×40mm, 60×60mm, 35×35×25mm, 80×80×30mm. Sizes match different needs:

Small (35×35×25mm): Dense blades, fine cutting. Good for soft materials (plastic film, woven bags). Output: 20-25mm, for small/medium precision machines.
Standard (40×40×25mm, 60×60mm): Balances efficiency and versatility. Handles solid blocks, cardboard, plastic bottles, rubber. Output: 25-40mm, for most standard single-shaft machines.
Large (80×80×30mm): Strong, impact-resistant. Made of D2/DC53. Handles large hard materials (wood, tires, thick plastic, metal cans). Output: 50mm+, needs high-power machines.

Mounting Hole & Stability

Central holes are convex or flat, fitting different holders. Keeps blades stable during high-speed rotation and cutting, ensuring safety. Some blades have inward-cut edges to improve cutting precision with the fixed blade.

Single-Shaft Blade Manufacturing Process

The manufacturing process affects blade hardness, precision and wear resistance. Key steps:

Blanking & Forging

High-quality alloy blanks are cut and forged. This improves the material’s internal structure, making blades tougher and stronger, preventing breakage.

Heat Treatment

D2 and DC53 use different heat treatment. DC53’s hardness is controlled at HRC 62-63 (max toughness/wear resistance). D2’s hardness is HRC 58-60 (better wear resistance). Heat treatment removes internal stress, balancing hardness and toughness to avoid chipping.

Precision Machining

CNC machines, wire cutting and precision grinding ensure blade size, flatness and sharpness. This ensures proper fit with the holder and fixed blade, improving cutting stability.