Spiral grain separator, a manually-operated machine is cost-effective that requires minimum maintenance. All round-shaped grains like green gram, black gram, soybean, Bengal gram etc can be cleaned and graded at the range of 15–30 minutes per quintal with this machine. Being time-and labour-saving and drudgery-reducing farm implement it can be of best use to the farmers.
Field validation, drudgery, spiral grain separator