Customized Shredder Spacers And Shredder Blades

Double Shaft Shredder Blades & Precision Spacers: Core Components for Efficient Solid Waste Recycling

• Crushing efficiency

• Uniformity of output particle size

• Energy consumption

• Equipment service life and maintenance costs

How Double Shaft Shredder Blades Work

• Two independent, opposite-rotating shafts with spiral, staggered claw blades form a meshing crushing chamber.

• Blades grab materials quickly to avoid slipping or jamming.

• Powerful torque delivers shear and tear force, cutting large/irregular materials into small, uniform pieces (5.5–10 rpm, low-speed, high-torque).

• Staggered blades ensure constant shearing—higher efficiency than single shear. Shaft design and blade meshing precision affect stability.

Blade Structure: Strength & Easy Maintenance

Key Design Features

• Customizable Claws & Thickness

• Claw options: 2-claw / 3-claw / 6-claw / 8-claw / 12-claw (more claws = finer output)

• Thickness options: 10mm/20mm/40mm/50mm/75mm (thicker = better impact resistance for hard materials)

• Modular Quick-Change Design

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

• Replace worn parts with bolts—cuts downtime, ideal for industrial use

• Strong Torque Transmission

• Spline/hexagonal main shaft; blade inner hole fits perfectly

• Balanced force, no blade cracking or shaft deformation—suitable for high-load work

Blade Materials: Choose Based on Your Needs

• High Manganese Steel

• Tough, strong impact resistance; surface hardens during use

• Best for: municipal waste, construction waste, high-sand/impurity waste

• Alloy Tool Steel (9CrSi)

• Hard, wear-resistant; mature production, low cost

• Best for: soft waste (rubber, paper, fibers)

• Cold Work Tool Steel (Cr12MoV, SKD-11)

• Very wear-resistant, good impact resistance; little heat treatment deformation

• Hardness after quenching: HRC 58–62; longer life than ordinary materials

• Best for: medium-high hardness materials (wood, hard plastic, metal scraps, electronics, tires)

• Hot Work Tool Steel H13

• Excellent overall performance (wear + impact resistance)

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

Blade Application Range

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

• Synthetic Materials: PE/PP films, woven bags, plastic barrels, PE pipes, electronic casings, circuit boards, refrigerator shells

• Construction/Mixed Waste: Renovation waste, bulky waste, aged waste, landfill rejects (high-manganese steel handles sand/impacts)

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

• Special Industrial Materials: Whole tires (reinforced blades), industrial mixed waste (customizable for high-load use)

Core Blade Performance

• Long Service Life: SKD-11/DC53 blades can be reground 4 times; 4 rotatable cutting edges—lowers replacement costs

• Stable Operation: PLC control + overload reversal; 6-layer sealed bearings + high-manganese liners; low noise (<85dB), low dust, 24-hour continuous use

• Energy Saving: Blade structure + variable frequency drive cuts energy use by 15–30%—lowers operating costs

Blade Maintenance Tips

• Regular Regrinding: Regrind worn blades promptly to restore sharpness; high-quality blades can be reground 4 times

• Gap Adjustment: Check and adjust blade gaps (blade-blade, blade-liner) regularly to avoid low efficiency or uneven output

• Timely Replacement: Replace chipped/cracked blades or those that can’t be reground—prevents equipment failure and high energy use

• Daily Check: Tighten blade bolts before/after use to prevent loosening and ensure safety

Precision Spacers: Extend Blade Life

Why Precision Spacers Matter

• Shredding is high-torque shearing—even 0.1mm spacer error causes blade collision (chipping) or too much gap (material wrapping, heat buildup).

• We use parallel grinding for all spacers—ensures blades stay perpendicular, consistent shearing gap across the chamber.

Vacuum Heat Treatment: Better Durability

• Blades and spacers get advanced vacuum heat treatment.

• Spacers: No "compression set" (thinning under pressure).

• Blades: Uniform grain structure resists wear from plastics, tires, metal scraps.

• Vacuum-hardened steel stays dimensionally stable longer than surface-hardened types.

Buying Guide: Blades & Spacers

• Match Materials

• Hard materials (metal, hard plastic, tires): Choose SKD-11, Cr12MoV

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

• Soft materials: Choose 9CrSi alloy steel

• Spacers: Use vacuum-heat-treated steel for stability

• Choose Structure

• Priority: Modular quick-change + hexagonal main shaft (easy maintenance)

• Fine output: 8/12 claws; coarse crushing: 2/3 claws

• Hard materials: Thicker blades + parallel-ground spacers

• Cost-Effective Choice: Urban waste recycling—high-manganese blades + variable frequency drive + precision spacers (balances performance and cost)

• Customization Tips: Provide manufacturer with equipment model, shaft diameter, installation size, waste type, and desired output size

Bespoke Engineering, Direct from Factory

• Turnkey solutions for single-shaft to four-shaft shredders (all major brands)

• Our team uses your CAD drawings or existing samples for 100% fit