An onion size grader for common onion with capacity of 2 ton/h was developed. It has the components namely i) feeding chute, ii) grading drum, iii) collection chute and iv) power transmission system. The grader has three portions in which cushioned rods were mounted with a constant gap to grade onion less than 40 mm, 40.1 – 60 mm and 60.1 – 75 mm. The oversize onions greater
