Crumbler® Rotary Shear

Save Costs and Improve Feedstock Quality

Size reduction is a key processing step for feedstocks. Traditional methods include hammermills, grinders, and chippers. However, these methods typically are either limited to producing ½” and larger particles or require pre-drying of biomass at a substantial energy cost. Additionally, these methods may produce large amounts of fines with wide particle distributions and poor flowability.

Forest Concepts developed the Crumbler® rotary shear to address these common problems and produce a superior result.

Key Benefits: 

  • Processes any moisture content – no pre-drying necessary
  • Scalable for both small & industrial-scale operations
  • Tested on many materials – wood, recyclables, corn stover, hemp & more (see the complete list)
  • Results in evenly shaped highly-flowable particles with less fines 
  • Efficiently produces particles as small as 1mm
  • Quiet performance – our in-house experience demonstrates that Crumbler® operates at 85 db versus traditional hammermill at 110-120 db
  • Low carbon footprint (learn more)
We are pleased to offer our Crumbler® rotary shear in a range of models to suit your project. Each of our Crumbler® models can be customized as needed. Not sure which Crumbler® model is right for you? One of our engineers can help – just ask.

Read more about our Crumbler® technology:

Crumbler Cutterset

Beneficiation of Chipped and Shredded Woody Biomass

Abstract Forest Concepts, with funding from USDA NIFA SBIR program, developed methods and equipment to reprocess low-value dirty forest chips, tree service chips, and hog fuel into high value clean wood fiber and other valuable fractions. Traditional clean sources of

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Crumbles with Hand

Shear Processing of Wood Chips into Feedstock Particles

Abstract We have an objective to convert cellulosic biomass raw materials into small particles that are optimized for biochemical and/or thermochemical conversion to liquid transportation fuels. As a side effort, we are interested in producing feedstocks for composite bioproducts, solid

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