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Woodworking Machines > Shredders > Robust SD90 Shredder
Robust SD90 industrial shredder machine in green and dark grey with a large open-top hopper feed
A large pile of pale, rough-cut timber offcuts and wood scraps scattered loosely together
Close-up of triangular carbide cutting teeth mounted along the steel shaft of a Robust SD90 Shredder rotor
A hand holding a handful of pale golden wood shavings over a large pile of shredded wood material
Close-up of a perforated metal shredder screen with circular holes revealing worn cutting blades beneath
Close-up of a metal shredder intake funnel surrounded by loose dry straw and wood chip debris on a dark metal surface
  • Robust SD90 industrial shredder machine in green and dark grey with a large open-top hopper feed
  • A large pile of pale, rough-cut timber offcuts and wood scraps scattered loosely together
  • Close-up of triangular carbide cutting teeth mounted along the steel shaft of a Robust SD90 Shredder rotor
  • A hand holding a handful of pale golden wood shavings over a large pile of shredded wood material
  • Close-up of a perforated metal shredder screen with circular holes revealing worn cutting blades beneath
  • Close-up of a metal shredder intake funnel surrounded by loose dry straw and wood chip debris on a dark metal surface

    Robust SD90 Shredder

    Robust
    A compact single-shaft shredder for joinery and timber workshops that need a repeatable, largely hands-off shredding process. Handles standard offcuts, panel waste, and pallets, with sieve-controlled output size to suit downstream briquetting or biomass use.

    Typically chosen by

    • Joinery and timber workshops producing consistent offcut and panel waste who need a reliable, repeatable shredding process
    • Operations considering downstream briquetting or biomass use, where consistent chip or shred size matters
    • Businesses wanting a machine with an intelligent control system and hydraulic feed to reduce operator intervention
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    Key specification considerations

    Motor Power
    18.5 kW or 22 kW
    Two motor options are available — discuss your duty cycle and shift pattern with us to determine which suits your load.
    Throughput
    4–7 m³/h
    Output varies with material type and the sieve aperture fitted — finer sieves reduce throughput rate.
    Knife Configuration
    38 hardened knives, four cutting edges each
    Four cutting edges per knife means the blade can be rotated rather than replaced each time it dulls, extending usable service life and reducing consumable costs.
    Machine Weight
    2,050 kg (machine only)
    At over 2,000 kg, floor loading should be checked before installation — consult your structural engineer if siting on anything other than a ground-level concrete slab.
    See full specifications
    SpecificationValueNotes
    Control System
    BOVER BASIC intelligent control system (BOVER PREMIUM available as upgrade)
    The intelligent control system manages motor start-up and operational sequencing automatically, reducing operator error and wear on the drivetrain.
    Motor Start-Up
    Star/triangle system
    Star/triangle start-up reduces the inrush current when the motor starts, which can be important for workshops on a constrained electrical supply.
    Drive System
    Electric motor with reduction gear and belt transmission
    Feed System
    Filling hopper with hydraulic pressure unit (larger hopper available as upgrade)
    Motor Power (kW)
    18.5 kW or 22 kW
    Two motor options are available — discuss your duty cycle and shift pattern with us to determine which suits your load.
    Electrical Supply
    Three-phase — confirm exact supply requirements with IWM before ordering
    At 18.5–22 kW this machine requires a three-phase supply; verify available amperage and cable run with your electrician before specifying.
    Throughput / Output
    4–7 m³/h (material and sieve aperture dependent)
    Output varies with material type and the sieve aperture fitted — finer sieves reduce throughput rate.
    Filling Hole (mm)
    1,445 × 1,565
    Rotor Working Length (mm)
    870
    Rotor Diameter (mm)
    270
    Number of Knives
    38
    Sieve Hole Diameter (mm)
    10–50 (selectable)
    Sieve aperture determines output particle size — specify the aperture that matches your downstream process when ordering.
    Knife Type
    Hardened knives with four cutting edges
    Four cutting edges per knife means the blade can be rotated rather than replaced each time it dulls, extending usable service life and reducing consumable costs.
    Cleaning Knives
    Hardened cleaning knives
    Cutting Racks
    Hardened cutting racks
    Sieve Material
    HARDOX
    HARDOX is a wear-resistant steel grade, which is relevant if you are processing harder or abrasive timber species that would degrade a standard sieve more quickly.
    Machine Dimensions (mm)
    2,000 × 1,600 × 1,780 (L × W × H)
    Allow additional clearance beyond the machine footprint for feed access, extraction ducting, and operator movement.
    Machine Weight (kg)
    2,050 (machine only) / 3,200 (SD90 + interface + P130 with hopper)
    At over 2,000 kg, floor loading should be checked before installation — consult your structural engineer if siting on anything other than a ground-level concrete slab.
    Noise Level
    Contact IWM for confirmed figure
    Noise output is not published in manufacturer specifications — talk to us before specifying if your site has acoustic constraints or if operators will be working in close proximity for extended periods.
    Optional Upgrades
    BOVER PREMIUM control system; larger filling hopper; pre-shredder P100 or P130
    The pre-shredder option is worth considering if your waste includes larger-dimensioned timber that would otherwise need manual reduction before feeding.
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    Is this the right
    machine for you?

    Choose the Robust SD90 Shredder if...

    • Your waste volumes suit a compact, single-rotor shredder and you do not need the higher throughput of larger models in the range
    • You want a machine with an intelligent control system and hydraulic feed as standard, with the option to upgrade as your operation grows
    • You are processing standard joinery or panel offcuts rather than bulky, oversized timber sections
    • You want the flexibility to add a pre-shredder (P100 or P130) later if your feed material becomes less consistent

    Consider an alternate model if...

    • Your waste volumes are significantly higher — the Robust SD450, SD600, or SD700 are designed for larger-scale continuous throughput
    • You are processing particularly bulky or large-dimensioned timber and need a wider feed opening from the outset — the Robust SD90 XL offers a larger filling hole (2,030 × 1,565 mm) within the same machine family
    • Your throughput and material requirements are unclear — talk to us before specifying, as the right machine in the range depends heavily on your actual waste profile
    Still not sure? We're happy to help
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