Development of low cost rotary disc size grader for fruits and vegetables

Grading of fruits and vegetables is an important operation affecting quality, handling & storage of produce. Manual grading is costly, time-consuming and inefficient. A low cost, on-farm rotary disc size grader was designed and fabricated for grading spherical fruits and vegetables using rubber balls of different diameters in the laboratory. It was observed that the disc speed of 60–70 rpm was the most suitable for proper separation of different grades. The grader shall be tested for various fruits and vegetables both in laboratory as well as in the field.