The major processes concerned in the composition of castor oil are cleaning of the raw materials, conditioning, pressing, cleaning and storage. Extraction of oil from castor seeds is similar to Sesame, rapeseeds, cotton seeds, sunflower seeds and other seeds. Castor oil includes gum element that affects utilization of the oil as a lubricant. It involves oil pressing which is done using high temperatures using an expeller which provides continuous screw press. The expeller breaks up the seed by subjecting it to pressure and therefore removing any oil from it. The extracted oil is then filtered and the material removed from the oil is fed back to the system along with fresh material. The product that is finally discharged from the oil mill is known as castor cake and contains around eight to ten percent of the oil.