Grading Machines



Products in this page

Radial Graders

The radial grader is fitted with laterally spaced stainless-steel grading rollers. The gap between the rollers increases gradually over the different grading phases. Conveyor belts, one for each grading size, are placed under the grading machine.

As the distance between the rollers increases over the size points, the second roller lowers in position to ensure that the product is well positioned between the rollers. The speed of the machine is adjustable by a frequency control unit, and the machine is equipped with a greasing system that ensure that the machine is always properly lubricated.


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Produce R 80 R 120 R 150 R 180 R 200 R 260
Carrots 3-4 8 14 20 25 35
Baby Carrots 3-4 5-8 10-12 14-16 18-22 25-30
Red Beet 5-6 8-10 14-16 22-30 35 45
Potatoes 6-7 8-10 15-18 22-30 35-40 45-50
Parsnips 2-3 3-4 6-8 12 18 24
Onions 6-7 8-10 15-18 22-30 35-40 60
Set Onions 3-5 6-8 10-12 14-16 18-22 25-30

Note: All capacities are in Tons/hour

Specs R 80 R 120 R 150 R 180 R 200 R 260
Length (mm) Depends on Model Depends on Model Depends on Model Depends on Model Depends on Model Depends on Model
Width (mm) 1250 1650 1950 2450 4500 2520
Ajustable Height (mm) 1720 1790 1790 2230 2266 1900
Drawing View View View View View View

Shake Graders

The shake grader is specially designed to grade potatoes according to their square size. The potatoes are fed on to the top sieve of the machine. The sieves shake at various frequencies causing the potatoes to move along them and drop in the slot that matches their size.

The sieves' motions are triggered by the front-side motor of the machine. This engine drives crankshaft that causes the sieves to shake. The machine's motor is a computer-controlled frequency inverter that enables the sieves to shake at multiple sequential frequencies.


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Produce SG 60 SG 80 SG 120
Table/Industrial Potatoes 4-6 12-15 25-30
Seed Potatoes 3-4 10-12 20-25
Onions 3-4 8-10 18-20

Note: All capacities are in Tons/hour

Specs SG 60 SG 80 SG 120
Length (mm) 3500 6000 6700
Width (mm) 2700 4200 3600
Width Net Screen (mm) 600 800 1200
Number of Seive Decks 4 4 5
Drawing View View View

Screen Sizer

​​The screen sizer is designed to grade produce according to their square or hexagonal size. The machine has a vibrating rubber bed with openings. If the product is smaller than the opening, it falls onto a belt beneath it.


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Produce SS 90 SS 120 SS 180
Potatoes 8-10 12-14 18-20
Onions 6-8 10-12 15-18
Seed Potatoes 5-8 10-12 15-18

Note: All capacities are in Tons/hour

Specs SS 90 SS 120 SS 180
Length (mm) Depending on Sections Depending on Sections Depending on Sections
Width (mm) 1100 1400 2000
Screen Width (mm) 900 1200 1800
Drawing View - -

Chunk / Length Grader

The chunk/length grader is especially made for sorting carrots and similar shaped products. The machine is designed to filter out oversized carrots, because they do not fit for packaging, and to take out the broken and undersized carrots. This machine can be delivered with various grading sizes and capacities.

The stainless-steel bed ensures that the machine is food grade and safe to use for your products. The frame is made of galvanized steel to guarantee a long service life for the machine.


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Model Capacity
L 100 2-3
L 120 3-5
L 150 4-7
L 180 6-9
L 200 8-11

Note: All capacities are in Tons/hour

Specs L 100 L 120 L 150 L 180 L 200
Length (mm) Depending on Sections Depending on Sections Depending on Sections Depending on Sections Depending on Sections
Width (mm) 1250 1450 1750 2150 2250
Bed Width (mm) 1000 1200 1500 1800 2000
Drawing View View View View View

String Grader

The string grader is built to pre-grade the undersized produce or stones to separate oversized produce like red beet. The unit has a minimum grading size of 40mm and a maximum size of 70mm.


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Specs PS 70-17
Width Belt (mm) 1200
Belts 17
Minimum Grading Size (mm) 50
Maximum Grading Size (mm) 75

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