Heavy-Duty Double Shaft Shredder Blades

Heavy-Duty Double Shaft Shredder Blades FAQ

1. What materials are your double shaft shredder blades made of?

• Hard waste (metal, hard plastic): SKD-11/Cr12MoV

• High-impact waste: High-manganese steel

• Soft waste: 9CrSi

• Other options: D2, DC53, H13 tool steels (vacuum heat-treated)

• Harsh conditions: High-alloy wear-resistant steel (optional)

2. What hardness do the shredder blades reach?

• Standard hardness: HRC 58-62

• Balances hardness and toughness to avoid cracking, chipping or quick wear

• Hardness adjusts based on blade material (e.g., SKD-11/Cr12MoV for hard waste stays hard)

3. Can blades be customized in size and tooth shape?

Customization tips:

• Provide us your machine model, shaft diameter, waste type and desired output size

• Customizable details: thickness, outer diameter, inner hole, number of teeth, tooth height, cutting edge angle, surface coating

• Tooth count tip: More claws = fine output; Fewer claws = coarse crushing

4. What materials are suitable for these heavy-duty shredder blades?

• Solid waste, plastic, rubber tires, wood, cardboard

• Light metal scraps, household waste, industrial waste, construction waste

• SKD-11/Cr12MoV → Hard waste (metal, hard plastic)

• High-manganese steel → High-impact waste

• 9CrSi → Soft waste

5. How long is the service life of heavy-duty double shaft shredder blades?

• Depends on waste type, blade material and working hours

• Normal use: 3–12 months

• Examples: High-manganese steel (cost-effective for municipal waste); High-alloy/SKD-11/Cr12MoV (longer life for hard waste)

6. Can worn shredder blades be re-sharpened?

• Yes, our blades have enough margin for re-grinding

• Professional re-sharpening restores cutting performance and extends service life

• Saves cost, especially for 9CrSi blades (used for soft waste)

7. What heat treatment process do you use?

• Process: Vacuum quenching + tempering

• Benefits: Uniform hardness, less internal stress, better toughness, no brittle fracture

• Ideal for high-manganese steel (high-impact waste) and SKD-11/Cr12MoV (hard waste)

8. Do your blades fit mainstream double shaft shredder models?

• Yes, we match most mainstream brands and models

• Provide us your machine brand, model, shaft diameter, waste type and desired output size for a perfect fit

• Structure option: Modular quick-change + hexagonal shaft (easier to maintain)

9. What’s your minimum order quantity & delivery time?

• Minimum order: Small-batch trial orders are allowed

• Delivery time: Standard sizes (in stock, fast delivery); Custom sizes (7–15 working days)

• Cost-effective option: Municipal waste → High-manganese steel + variable frequency drive (saves energy, good performance)

10. What after-sales support do you provide?

• Strict quality check before delivery

• Free replacement or technical support for quality issues (normal use)

• Professional guidance: Installation, maintenance (including modular quick-change structure), re-sharpening

Double Shaft Shredder Blades & Twin Shaft Shredder Blades

What Are They?

• They are key cutting parts for solid waste recycling machines.

• Their wear resistance and impact resistance affect: crushing efficiency, output particle uniformity, energy use, machine life and maintenance costs.

• Two shafts rotate in opposite directions to mesh, shear and tear materials (better than single-shaft machines).

• They can handle hard-to-process materials: metal, plastic, construction waste, household waste.

• Choosing the right blades helps improve efficiency and cut costs.

Core Working Principle

• Two independent shafts rotate in opposite directions synchronously.

• Claw-type blades are arranged in a spiral, staggered way to form a crushing chamber (prevents slipping and jamming).

• Powerful torque provides shear and tear force to turn large materials into small, uniform pieces (works at 5.5–10 rpm: low speed, high torque).

• Staggered blades ensure continuous shearing, which is more efficient than single-shear mode.

Blade Structure Design

1. Customizable Claw 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 = stronger impact resistance for hard materials).

2. Modular Quick-Change Design

• Structure: blade body + clawed blade + auxiliary blade.

• Replace worn parts by loosening/tightening bolts (reduces downtime).

3. Enhanced Torque Transmission

• Main shaft: spline/hexagonal structure (matches blade inner hole perfectly).

• Balances force, prevents blade cracking and shaft deformation (suitable for high-load continuous work).

Blade Material Selection

High Manganese Steel

Tough, impact-resistant; good for municipal waste, construction waste, and waste with sand/impurities.

Alloy Tool Steel (9CrSi)

Hard, wear-resistant; low cost; good for soft waste (rubber, paper, fibers).

Cold Work Tool Steel (Cr12MoV, SKD-11)

Very wear-resistant and impact-resistant; little heat deformation; good for medium-hard waste (wood, hard plastic, metal scraps, tires); hardness HRC 58–62.

Hot Work Tool Steel (H13)

All-around performance; good for multi-scenario use, especially high-load industrial waste processing.

Applicable Materials

• Metals: Aluminum cans, paint cans, car shells, scrap steel, metal scraps.

• Synthetic Materials: Plastic films, woven bags, plastic barrels, electronic casings, circuit boards.

• Construction/Mixed Waste: Renovation waste, bulky waste, landfill screen rejects (use high-manganese steel).

• Organic Materials: Used furniture, branches, garden waste, dewatered kitchen waste.

• Special Materials: Whole tires (reinforced blades), industrial mixed waste (customizable).

Core Performance

• Long service life: SKD-11/DC53 blades can be reground 4 times; 4 cutting edges (reduces replacement costs).

• Stable operation: PLC control + overload reversal; low noise (<85dB), low dust; 24-hour continuous work.

• Efficient and energy-saving: Reduces energy consumption by 15%-30% (cuts operating costs).

Maintenance & Upkeep

• Regrind regularly: Restore sharpness (high-quality blades can be reground 4 times).

• Adjust gaps: Check and adjust blade gaps (prevents poor efficiency and uneven output).

• Replace worn parts: Replace chipped/cracked blades (avoids equipment failure).

• Check bolts: Tighten blade bolts before/after use (ensures safety).

Purchase Recommendations

• Match materials: Hard waste (metal, hard plastic) → SKD-11/Cr12MoV; high-impact waste → high-manganese steel; soft waste → 9CrSi.

• Choose structure: Modular quick-change + hexagonal shaft (easier maintenance); more claws for fine output, fewer for coarse crushing.

• Cost-effective options: Municipal waste → high-manganese steel + variable frequency drive (balances performance and energy saving).

• Customize wisely: Provide manufacturer with machine model, shaft diameter, waste type, and desired output size.

How to Choose Blade Thickness?

Key Rules

Material hardness

Soft (plastic, wood) → 15–25mm; Medium (rubber) → 30–40mm; Hard (metal) → 50–100mm.

Machine torque

Small machine → 15–30mm; Medium → 30–50mm; Large → 50–100mm.

Feed size

Large/heavy feed → thicker blades; Fine shredding → thinner blades.

Material match

H13 → 40–100mm; 9CrSi → 20–50mm; Cr12MoV → 15–40mm.