Nut calibration

Profit from our know-how in nut processing and increase your productivity in all processes.

Sort nuts into various sizes.

Calibrate smaller nut amounts according to size.

The dry nuts are sorted into various size classes during calibration. This simplifies not only the subsequent cracking of nuts, but also their sale.

For smaller amounts of walnuts, the calibration sieve is suitable. In this way, the walnuts can be sorted into 3 sizes with the help of a sieve-like attachment. For larger nut amounts, the multi-functional washing and calibration machine is used. This calibration machine has exchangeable drum rollers, so that drying, calibration, and separating can take place.

Machines for calibrating nuts from Feucht Obsttechnik

Calibration sieve

Separate nuts according to three sizes.

The calibration sieve is used to sort nuts into 3 different sizes. The calibration sieve is placed over 3 fruit crates. The openings of the sieve, i.e. the calibration size, becomes larger from left to right.

For calibration, place the walnuts on the left side and slide them from left to right over the calibration sieve. The calibration sieve is also available for hazelnuts. With the calibration sieve for hazelnuts, the calibration sizes are considerably smaller and this means they are adapted to hazelnuts.


Details on the calibration sieve


  • very simple handling
  • fast calibration of the nuts
  • simple transport thanks to light weight
  • other calibration sizes possible upon request

Technical data

26 cm
100 cm
7 cm
8 kg
Calibration size:
28 mm, 30 mm, 32 mm (walnut)
14 mm, 16 mm, 18 mm (hazelnut)

Other sizes are available upon request
Scope of delivery:
1 x sieve (walnut or hazelnut)

Washing and calibration machine

Cleaning, calibrating and separating shells from walnuts.

This washing machine cleans and calibrates the nuts and separates the raw shells from the nuts. In this way, the machine removes up to 95% of raw shells. To clean the nuts, a special washing drum is used (oval design). For the calibration of the nuts, the roller/drum is exchanged and replaced by a round hole sieve.

You can choose between two calibration sizes. The washing and calibration machine is driven by a standard drill. Optional with nut feeder or electric motor with 230V.

Details on the washing and calibration machine


  • multi-function combination device for washing, calibrating, and dividing
  • easy transport due to light weight
  • various calibration sizes possible
  • special calibration sizes possible upon request
  • Optional: Nut feeder or electric motor with 230V

Technical data

160 cm
65 cm
105 cm
65 kg
Washing – approx. 100 – 120 kg/h (20kg/drum every 10 minutes)
Calibrating – approx. 150 kg/h (in two sizes)
Scope of delivery:
1x washing and calibration machine
1x wash drum
1x calibration sieve (diameter – 28/30)
1x calibration sieve (diameter – 30/32)
Other sieve sizes are available upon request, e.g. 14/16 or 18/20
The drill is not included in the scope of delivery