Grading is by rollers, one bed of fixed bottom rollers and a top bed.  Every second roller moves vertically to make a grade. It is driven via variable speed motor. 

Feeding the rollers is a spreader section of 6 rubber-covered rollers to spread the product across the width of the machine.  The machine comes on adjustable legs but can be of any height.

Sizes vary from 1 metre wide with 2 grades up to 2.2 metre wide with up to 6 grades and any size in between.

Grading bands specifications are:

On plain rollers for carrots, parsnips or daffodil bulbs: 20mm – 89mm

On diabolos (bobbins) for potatoes and onions: 30mm – 100mm

Machines available in mild steel painted, hot dipped galvanised or stainless steel (INOX)

Machines can be manufactured to suit the customer’s requirements.

To find out more about lift roller graders please follow the link below:

http://www.tongpeal.co.uk/grading/2/index.phtml