This patent deals with a portable/small sized rice-polishing machine and specifically modifies the distance roller assembly by introducing V-shaped guiding notches/grooves at the interface section of the roller. The V-shaped guiding grooves/notches keep sloughed rice grains from sticking or pressing together or being stuck under friction, heat, and pressure at the interface point between the transport screw and the polishing unit, thus preventing debris accumulation within the machine and making an efficient discharge of polished white rice grains possible. With this patent, the economic and productivity aspects of operating a potable/small sized rice-polishing machine are much improved.
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