Just like any other KIRSCH + MAUSSER roasting machine, the roasters of the G series are also based on the drum roasting method: special shovel blades inside a horizontally lying, rotating roasting drum ensure even mixing of the beans during the roasting process and a homogeneous product. The pneumatic openings on the machine hopper, roasting drum, and cooling screen outlet, which are already included as standard, enable convenient operation of the roasting machines. The G roasters with a capacity of 60 to 120 kg per batch are - also as standard - equipped with a manual control system via pushbuttons. Optionally, the G series roasters can be equipped with a semi- or fully automatic control solution with touch screen. All control options ensure reliable processing of green and roasted coffee.


The ideal diameter-length ratio of the roasting drum of the G roasters guarantees a homogeneous heat transfer onto the beans during the roasting process. In addition, the G roasters offer the following benefits:

  • even mixing of the coffee beans inside the roasting drum
  • Frequency converter to adjust roasting air volume (optional for drum drive and stirrer)
  • Function of the traditional "aroma wheel" via flap control
  • intensive cooling
  • powerful fans
  • reproducible product quality
  • independent drives for the drum, stirrer as well as roasting and cooling fan
  • additional separate cooling sieve outlet
  • easy to clean thanks to large maintenance openings
  • reduced dust emissions thanks to additional cooling exhaust air cyclone


Batch size (kg)
20 - 65
Roasting times (min)
10 - 20
Roasting capacity (kg/h)
100 - 195
Batch size (kg)
25 - 80
Roasting times (min)
10 - 20
Roasting capacity (kg/h)
125 - 240
Batch size (kg)
30 - 95
Roasting times (min)
10 - 20
Roasting capacity (kg/h)
150 - 285
Batch size (kg)
60 - 120
Roasting times (min)
10 - 20
Roasting capacity (kg/h)
240 - 360


The G roasters are equipped with thermocouples as standard to document the supply air, product and exhaust air temperature. The basic version is controlled manually. Optionally, the G roasters can be equipped with a semi- or fully-automatic control solution with a touch panel.

  • Recipe management with up to 20 user-definable recipes; saved setting can be reproduced safely and automatically (semi- and fully automatic control solution)
  • Visualization of the roasting curve on the touch screen (semi- and fully automatic control solution)
  • Burner output can be selected manually or automatically from a recipe (semi- and fully automatic control solution)
  • Interface for external software systems from Artisan and Cropster (semi- and fully automatic control solution)
  • Process safety through pneumatic opening flaps on the bean container, roasting drum and cooling sieve outlet (semi- and fully automatic control solution)
  • additional protective cover on the cooling sieve ( fully automatic control solution)
  • Emergency water quenching for the roasting drum (fully automatic control solution)
  • additional water quenching for the chaff collection container of the roasting cyclone (fully automatic control solution)
  • automatic heat switch-off when the desired final temperature is reached
  • automatic safety shutdown of the burner when the temperature limit is reached


The burner used in the G roasters can be configured for use with natural gas or propane, depending on customer requirements, and stands out due to the following features:

  • high capacity
  • continuously adjustable for a more flexible roasting process
  • state-of-the-art safety technology, including gas and flame monitoring

The G`s roasting cyclone features a large, wheeled chaff collection container made of aluminium, making it light and easy to empty. In addition, the cyclone offers the following features:

  • individually adjustable
  • manual emergency water quenching for the chaff collection container

The G roasters come as standard with an additional cyclone for the cooling exhaust air. This extra exhaust air treatment keeps the amount of dust particles that enter the environment to a minimum.

Even in the basic version, the roasting fan of the G roasters is equipped with a frequency converter. In addition, it stands out due to its particularly high performance and  connectivity to an exhaust air treatment system.


The KIRSCH + MAUSSER green coffee conveyors make it extremely easy to feed green coffee into the feed hoppers of the G roasters.

To further treat the visible exhaust gases released during roasting, the G roasters can be equipped with an afterburner specially designed for this process.

KIRSCH + MAUSSER destoners reliably remove foreign objects with a higher specific weight than roasted coffee.