Polishing drums in palm oil mills serves to clean the fiber or palm fiber that is still attached to the layer of palm seeds or nuts.
With the cleaning of the palm fiber, it will certainly maximize the clash (collision) of the seeds with a nut cracker wall.
In addition, the clean fiber in palm oil or nuts will maintain the cleanliness of the nut or silo seeds so that the structure of the seed silo is more durable and the nut/palm seeds can go down smoothly due to reduced waste disorders.