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Radial grader

The radial grader is designed for grading. The product is transported and rotated over rollers. The distance between the rollers increases, so as the product is being transported, it will fall from small to large between the rollers. The product falls onto a belt which continues transportation. Several belts are mounted for several grading sizes. Adjustable angles are mounted to get the size faster and give product more time to drop on the belt.

Types and specifications

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R 80

Width of the roll (cm) 80
Height and length of the machine depends on the setup.
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R 120

Width of the roll (cm) 120
Height and length of the machine depends on the setup.
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Radial-grader-R150
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R 150

Width of the roll (cm) 150
Height and length of the machine depends on the setup.
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R 165

Width of the roll (cm) 165
Height and length of the machine depends on the setup.
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Radial-grader-R180
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R 180

Width of the roll (cm) 180
Height and length of the machine depends on the setup.
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Radial-grader-R-200
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R 200

Width of the roll (cm) 200
Height and length of the machine depends on the setup.
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Radial grader R 260
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R 260

Width of the roll (cm) 260
Height and length of the machine depends on the setup.
Drawing

Options

Radial graders come up with options that include brusher, electrical adjustment, rubber flap, rubber mat, size indication and safety switches. See More Images

​​Material and treatment (frame)

  • Painted mild steel
    Frame is made from painted mild steel. The bearings and drive/idle rollers are from mild steel

  • Stainless steel
    Frame is made from stainless steel. The bearings and drive/idle rollers are from mild steel

  • Painted galvanized mild steel
    Frame is made from thermal zinc sprayed and painted mild steel. The bearings and drive/idle rollers are from mild steel

Material and treatment (plating)

  • Zinc plating
    The plating is made from zinc plated steel

  • Stainless steel
    The plating is made from stainless steel

Electrical control

  • No electric
    Motors and necessary sensors only. Wiring, additional sensors and/or control panel are not included

  • Stand-alone
    Motors, necessary sensors, switch box and control box

  • Central control in line
    Motors and necessary sensors

Material and treatment (electrical panel)

  • Painted mild steel
    The electrical panel is made from painted mild steel

  • Stainless steel
    The electrical panel is made from stainless steel

Adjustment grading size

  • Manual
    The grading size can be adjusted manually by spindles. The grading size is adjustable on every belt except the last, because the largest size is always sorted on the last belt

  • Automatic
    The grading size can be adjusted automatically. The grading size is adjustable on every belt except the last, because the largest size is always sorted on the last belt

Belt movement

  • Fixed belts
    Belts can not be moved inside the radial grader

  • Manual
    Belts can be moved manually inside the radial grader

  • Automatic
    Belts can be moved automatically inside the radial grader

Alignment – brush on top

  • Brush on top
    A brush is included to align product

  • Anti-lift
    Anti-lift on every belt except the last. This option prevents that the rollers are lifted by produce, typically used for elongated products

Cleaning

  • Brush
    A brush is included to clean the rollers

  • Roll cleaning mat
    A roll cleaning mat is mounted inside the machine to clean the rollers

Spray tube

  • A spray tube is included to either disinfect the product or keep the rollers slippery.

Oversize valve

  • The machine shuts down when product gets stuck between the rollers.

Amount of outlets

  • The amount of outlets possible in a radial grader are: 2, 3, 4, etc.

Estimated capacity
(tons/hour)

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

Grading size (min – max in mm)

Roll diameter Pitch 63 mm Pitch 76.2 mm Pitch 80 mm Pitch 90 mm Pitch 100 mm Pitch 110 mm Pitch 125 mm
57 mm 6-69
70 mm 6.2-82.4 10-90 20-110 30-130 40-150 55-180
76 mm 14-104 24-124 34-144 49-174
84 mm 16-116 26-136 40-165

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