Ground Hoppers

PCinstall325Gruber Systems offers a variety of Ground Hoppers for a variety of applications - including Cultured Marble, Solid Surface, Polymer Concrete and other Bulk Powder metering or conveying requirements.

Find your Ground Hopper by application:
  • Cultured Marble/Onyx/Stone Manufacturing with an Autocaster™ or Batchmaster™ machine.

  • Solid Surface Manufacturing with an Autocaster or Batchmaster machine.

  • Polymer Concrete Manufacturing

  • Bulk Filler Metering for other Batching Applications

Gruber Standard Powder/Granule Ground Hopper

Our standard auger-driven transport system Ground Hopper provides reliable conveying of powders such as calcium carbonate blends, ATH blends, as well as granules and other fine particle or lightweight fillers to fill the metering hoppers of Autocaster and Batchmaster metering machines. Does not include self-metering.

Gruber Self-Metering Ground Hopper

The Self-Metering Ground Hopper combines a robust ground hopper containing combined with a sophisticated PLC control system that provides touch-screen control of a conveying and metering system to deliver bulk materials to any mixing vessel.

The Self-Metering Ground Hopper that can be calibrated and set to dispense specified amounts of filler in any desired mixing vessel. A touch screen interface allows the user to specify the desired amount of filler to be dispensed or use one of 4 preset amounts.

NOTE: Designed for use for material metering and/or dispensing applications, and are not used with Autocaster casting or Batchmaster batching machines.

Gruber Pneumatic Ground Hopper

Automated metering of lightweight powder bulk filler over extended distances utilizing a positive pneumatic pressure (air) transport system.

Automatically meter and transfer lightweight filler material over extended distances with a Pneumatic-transport Ground Hopper. This eliminates the requirement for an auger, and allows the Ground Hopper to be placed in a more remote location - out of the way of the Autocaster casting system or the Batchmaster mixing station.

newNow, you can supply lightweight powder fillers like CalCarb/Lightweight powder blends and ATH blends to TWO different metering hoppers from a single Pneumatic Ground Hopper with the Dual-Feed model!

Gruber Mobile Ground Hoppers

For situations where you need your Ground Hopper to be movable or portable.

In some cases, your bulk filler handling system is not required to be a fixed location, and you may benefit by moving your Gruber Ground Hopper to where you need it for a given use. Portability offers added convenience and added value to your Bulk Filler Handling investment.

Batchmaster-specific Ground Hopper and Bulk Bag Suspender Frame

Special version Gruber Ground Hopper and Bulk Bag Suspender Frame option for use with the Batchmaster III Metering System.

Gruber Polymer Concrete Aggregate Belt Drive Ground Hopper

Designed to handle the demanding requirements of metering large rock or highly abrasive aggregates for polymer concrete and other specialized cast polymer manufacturing applications.

Gruber Large Aggregate Ground Hopper

Auger-based Ground Hopper configured for processing of larger aggregates such as quartz, sand, pea gravel or small rock of up to 3/8” (7 mm) diameter often used in Polymer Concrete and other cast polymer manufacturing applications.

Small Aggregate PC Ground Hopper

Auger-based Ground Hopper configured for processing of smaller aggregates such as sand, small pea gravel, as well as powders such as calcium carbonate or dolomite often used in Polymer Concrete and other cast polymer manufacturing applications.

  • For any application requiring small aggregate and powder fillers
Small Aggregate PC Ground Hopper

For lightweight powders such as Calcium Carbonate blends or ATH blends, choose from our Standard Auger-driven Ground Hopper, or a Pneumatic Transport Ground Hopper that offers some advantages over the auger-driven model.

Ground Hopper and other Bulk Filler Handling related Accessories


The Ground Hopper is one element of a complete bulk filler handling system. All Gruber Ground Hoppers can accommodate either bulk bags (super sacks) or individual bags of filler.  

Review all bulk filler handling products here:

  • Bulk Bag Gantry - automate lifting and positioning of bulk bags over the Ground Hopper for efficient and convenient bulk filler handling.
  • Bulk Bag Roller Conveyor easily transports super sacks to the ground hopper.

  • Bulk Bag Suspender Frame allows suspension of extra bulk filler material (bulk bags) above the ground hopper for additional processing capabilities.

Gruber produces a variety of Ground Hoppers for metering and conveying of fillers of all types. We if don't have what you need, we can custom configure a Ground Hopper to your specific needs for other materials or applications. Please call to discuss your needs.