Abstract
Double roller gins are commonly used in India for ginning seed cotton. International Textile Manufacturers Federation's survey 2005 reported that degree of grease and oil contamination in cotton lint is serious in India1. Study revealed that the source of this contamination is the gearbox (power transmission system) of double roller gin as it is filled with grease/oil measuring about 20 kg. Prototype double roller gin has been designed and developed with new power transmission system which minimizes the use of oil and grease to a great extent. High Volume Instrument's results on fiber parameters indicated that quality of lint is at par with existing double roller gin with no prospect of oil and grease contamination. Developed machine is useful for cotton breeders, ginners, farmers to ascertain the ginning percentage and purity of seeds could be maintained. This prototype double roller gin could be the basis for design of modified double roller gin of a commercial size.