Custom SKD-11 Double Shaft Shredder Blades for Plastic Recycling

High-Performance Custom SKD-11 Double Shaft Shredder Blades for Plastic Recycling 

Why SKD-11 Blades Are the Gold Standard for Plastic Recycling

Superior Material Properties of SKD-11

• High wear resistance to resist abrasion from plastics, fillers, and contaminants

• Excellent air-hardening characteristics for stable, long-lasting sharpness

• Hardness of 58–62 HRC after vacuum heat treatment

• Maintains edge far longer than conventional steel blades

Designed for High-Volume Plastic Waste

• Handles HDPE, PET, PP/PE films, hard plastics, barrels, pipes, and industrial waste

• Delivers consistent output size and reduces downtime

• Ideal for heavy-duty, continuous recycling lines

Precision Engineering & Custom Design

Blade Geometry & Shaft Compatibility

• Perfect interlock between two counter-rotating shafts

• Prevents material wrapping, jamming, and excess motor torque

• Customized to your machine’s exact specs: shaft diameter, spacing, rotation

Customizable Configurations

Claw Options (Cutting Performance)

• 2-claw / 3-claw: coarse shredding, high impact resistance

• 6-claw / 8-claw: balanced efficiency and output size

• 12-claw: fine shredding, higher shear frequency

Thickness & Durability

• 10mm / 20mm / 40mm / 50mm / 75mm thickness options

• Thicker blades = stronger impact resistance for hard plastics & mixed waste

How Double Shaft Blades Work: Core Principles

3-Stage Cutting Process

1. Grip & Feed: Spiral, staggered claw pattern grabs material instantly—no slippage

2. Shear & Tear: Dual counter-rotating shafts deliver powerful shear/tear force

3. Consistent Output: Continuous shearing for high efficiency & uniform particle size

Structure & Stability

• Meshing chamber design for maximum throughput

• Balanced load distribution reduces stress on shafts & motors

• Stable operation under heavy, continuous loads

Structure Design: Strength + Easy Maintenance

Modular Quick-Change Blade System

• 3-part design: blade body + clawed blade + auxiliary blade

• Replace only worn parts—no full disassembly

• Slashes downtime for blade changes & regrinds

Hexagonal / Spline Shaft Connection

• Precision inner hole matches shaft for zero slip

• Even torque distribution prevents cracking & deformation

• Built for high-load, 24-hour industrial use

Material Selection Guide (All Industrial Grades)

SKD-11 / Cr12MoV (Cold Work Tool Steel)

• Best for: hard plastics, metal scrap, wood, tires, e-waste

• Hardness: 58–62 HRC

• Top wear resistance & edge retention

High Manganese Steel (ZGMn13)

• Best for: construction waste, municipal solid waste, high sand/impurities

• High toughness & work-hardening under impact

9CrSi Alloy Steel

• Best for: soft waste—rubber, paper, fiber, cardboard

• Good hardness & cost-effective performance

H13 Hot Work Tool Steel

• Best for: multi-scenario industrial waste, high-load continuous use

• All-around performance: wear + impact resistance

Wide Material Applications

Key Recycling Applications 

• Plastics & Rubber: films, woven bags, barrels, pipes, casings, tires

• Metals: aluminum cans, scrap steel, alloys, sheet metal

• Construction & Mixed Waste: debris, bulky waste, landfill rejects

• Organics: wood, furniture, garden waste, dewatered kitchen waste

Core Performance Benefits

High Stability & Low Noise

• <85dB low-noise operation

• Six-fold sealed bearings & high-manganese liners

• PLC control + overload reversal for safe, trouble-free 24/7 run time

Energy Efficient

• Optimized blade geometry cuts energy use 15–30%

• Works with VFD drives for maximum savings

Maintenance & Upkeep Best Practices

Regular Maintenance Steps

Blade Regrinding

• Regrind promptly when dull to restore sharpness

• High-grade blades can be resharpened 4+ times

Gap Adjustment

• Check & adjust blade/liner gaps regularly

• Improper gaps reduce efficiency & increase energy use

Parts Replacement

• Replace chipped, cracked, or worn-out blades immediately

• Prevent equipment damage & higher operating costs

Daily Checks

• Tighten mounting bolts before/after use

• Ensure safe, stable operation

Buying Guide: Choose the Right Blades

Material Match Recommendations

• Hard plastics/metal/tires: SKD-11 / Cr12MoV

• Construction/municipal waste: High manganese steel

• Soft rubber/paper/fiber: 9CrSi

Structure & Configuration Tips

• Prefer modular quick-change + hexagonal shaft for lowest downtime

• 8/12-claw: fine output; 2/3-claw: coarse, high-impact crushing

• Thicker blades for hard, high-impact materials

Custom Order Information

• Equipment model & shaft diameter

• Installation dimensions

• Material type (hardness, impurities, moisture)

• Target output particle size