Twin Shaft Shredder Blade

High-Performance Twin Shaft Shredder Blades: Key to Large-Scale Waste Reduction

Why Blade Quality Matters for Your Recycling ROI

Metallurgy for High-Torque Use

• Deep-Core Hardness: Blades stay strong under high torque. No "mushrooming" or bending (common with surface-hardened blades).

• Balanced Toughness: Our vacuum cooling removes internal stress. Blades cut tough metals and plastics without breaking.

Precise Fit for Best Shearing Gap

• Our blades go through precision CNC machining and grinding.

• Each hook and cutting edge lines up perfectly.

• Tight tolerance cuts motor energy use and ensures consistent shredded material size.

Custom Spares Direct from the Factory

• Alas Machinery is a dedicated manufacturing facility.

• We make high-performance, long-lasting spares ready for immediate use.

• Our parts fit perfectly and last longer than standard ones.

• Less frequent maintenance means you can focus on boosting recycling output.

What Are Twin Shaft Shredder Blades?

Key Impacts of Blade Quality

• Shredding speed

• Consistency of shredded material size

• Energy use

• Machine lifespan

• Maintenance costs

How They Work

• Two shafts spin in opposite directions.

• Blades mesh, shear, and tear materials (better than single-shaft machines).

• Easily handle hard-to-process materials: metals, plastics, construction waste, municipal solid waste.

Core Working Principle

Dual Shaft Design

1. Two independent shafts spin in opposite directions at the same speed.

2. Claw-type blades are arranged in a staggered spiral to form a shredding chamber.

3. Materials are grabbed instantly to avoid slipping or jamming.

4. High torque lets blades shear and tear large, irregular materials into uniform small pieces.

5. Works at 5.5–10 rpm (low speed, high torque).

6. Staggered blades ensure continuous shearing for higher efficiency.

Structural Design: Strength + Easy Maintenance

Customizable Specifications

• Claw options: 2-claw, 3-claw, 6-claw, 8-claw, 12-claw. More claws = finer output.

• Thickness options: 10mm, 20mm, 40mm, 50mm, 75mm. Thicker blades = better impact resistance (for hard materials like thick metal, hard plastic).

Modular Quick-Change Design

• Blades have 3 parts: blade body + claw cutter + auxiliary blade.

• Replace worn parts by loosening/tightening bolts.

• Reduces downtime and boosts maintenance efficiency.

Strong Torque Transmission

• Main shaft: splined or hexagonal design.

• Blade’s inner bore matches the shaft perfectly.

• Even force distribution = no blade cracking or shaft bending.

• Suitable for high-load non-stop operation.

Material Selection (Match to Your Needs)

High Manganese Steel

• Tough and impact-resistant.

• Surface gets harder during use.

• Best for: municipal solid waste, construction waste, materials with sand/impurities.

Alloy Tool Steel (9CrSi)

• Hard and wear-resistant.

• Mature production, low cost.

• Best for: soft materials (rubber, paper, fiber).

Cold Work Tool Steel (Cr12MoV, SKD-11)

• Very wear-resistant and tough.

• Little deformation after heat treatment; stays sharp longer.

• Hardness: HRC 58–62 (after quenching).

• Best for: medium-to-hard materials (wood, hard plastic, metal scrap, e-waste, tires).

• Longer service life than regular materials.

Hot Work Tool Steel (H13)

• Balanced performance: wear-resistant and tough.

• Versatile for many materials.

• Best for: high-load non-stop industrial solid waste processing.

What Materials Can They Shred?

• Metals: Aluminum cans, paint pails, car shells, scrap steel, aluminum profiles, metal shavings.

• Synthetic materials: PE/PP film, woven bags, jumbo bags, plastic barrels, pipes, electronic housings, circuit boards, refrigerator shells.

• Construction/mixed waste: Renovation waste, bulky waste, expired waste, landfill screenings (use high manganese steel blades).

• Organic materials: Waste furniture, branches, garden waste, dewatered kitchen waste.

• Special materials: Whole tires (reinforced blades), mixed industrial waste (custom blades available).

Core Performance Benefits

• Long service life: SKD-11/DC53 blades can be reground 4 times. Each blade has 4 usable cutting edges (rotatable). Cuts consumable costs.

• Stable, low-noise operation: PLC control + overload protection, sealed bearings, high manganese steel liners. Noise <85dB, low dust. Works 24/7 non-stop.

• Energy-saving: Optimized blade shape + variable frequency drive. Cuts energy use by 15%–30%.

Maintenance Tips

1. Regrind regularly: Regrind worn blades to restore sharpness. High-quality blades can be reground multiple times.

2. Adjust gaps: Check and adjust blade-to-blade and blade-to-liner gaps. Too much gap reduces efficiency and consistency.

3. Replace when needed: Replace blades if chipped, cracked, or unable to be reground. Prevents machine failure and higher energy use.

4. Check bolts: Tighten blade bolts before and after use. Prevents loosening and ensures safety.

Buying Guide

Match Material to Your Waste

• Hard materials (metal, hard plastic, tires): Choose SKD-11, Cr12MoV, or cold work tool steel.

• High-impact/impurity materials (construction waste, MSW): Choose ZGMn13 high manganese steel.

• Soft materials: Choose 9CrSi alloy tool steel.

Choose the Right Structure

• Prefer modular quick-change blades + hexagonal main shaft (easier to maintain).

• Fine output: 8–12 claws. Coarse shredding: 2–3 claws.

• Hard materials: Use thicker blades.

Cost-Effective Choices

Customization Tips

• Machine model

• Shaft diameter

• Installation size

• Waste type (hardness, impurities, moisture)

• Desired shredded size