Dissimilar Speed Double Concentric Auger Metering Mechanism

Acrison’s heavy duty Model 105 and 140 Series of Volumetric Feeders for dry solids feature a unique, dissimilar speed, double concentric auger metering mechanism designed to accurately and reliably meter a very wide variety of dry solid materials. The metering mechanism consists of a large ‘conditioning auger’ or Intromitter, concentrically mounted around a smaller, slower rotating ‘metering auger’, operating at dissimilar speeds in a fixed proportion to each other by a single variable speed gearmotor.


  • Unique Dissimilar Speed, Double Concentric Metering Mechanism – conditions material to a very consistent state while efficiently and reliably filling the metering auger from a full 360º
  • Common Drive Network – mechanically links the slower speed ‘conditioning auger’ with the metering auger via a single, variable speed AC or DC gearmotor.
  • All Steel Construction – provides long-term durability with minimal maintenance requirements
  • Wide Range of Model Sizes – for feed rates from 0.0012 to 3400 cubic feet per hour


  • All contact parts are 304 stainless steel including the feeder’s drive shafts and seal components
  • Variable speed AC or DC gearmotor drive with either a 30:1 or 50:1 speed range

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Dissimilar Speed Double Concentric Auger Metering Mechanism Options:

  • Various materials of construction
  • Sanitary construction to comply with USDA and FDA codes and requirements
  • High temperature and pressure construction
  • Quick-disconnect construction for ease-of-cleanout
  • Various AC and DC variable speed motor controllers and control modes
  • Available as the integral metering mechanisms for certain model Acrison Weight-loss Weigh Feeders

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