DEVELOPMENT AND EVALUATION OF A SQUARE WIRE MESH TYPE OF POTATO GRADER

Abstract

Grading is an important operation for preparing potatoes for seed and commercial purposes. An improved
square wire mesh type of potato grader, has been designed and developed. Major systems of the grader are the main frames,
grading mechanism and power transmission system. Grading unit consists mainly of three numbers of grading sieves
having 52, 32 and 20 mm size square openings made out of 8 SWG MS wire. Conveyor belt system (take in conveyor) has
been provided for uniform feeding of potatoes to the grading mechanism. The grader can grade the potatoes in four size
grades e.g. < 20 mm, 20-32, 32 -52 and > 52 mm. The output capacity of this grader is 5-6 t/h and its would reduce the cost
of grading by 68.18%.