<![CDATA[This study aims to analyze the effect of variations in roll gap distance and silver thickness on surface roughness in the cold rolling process using jewelry rolling press, as well as compare the rolling results with manual drive systems and electric motors. The study used an experimental method with sterling silver materials with an initial thickness of 2 mm and 1 mm. At a thickness of 2 mm, roll gaps of 1.7 mm, 1.5 mm, and 1 mm were used, while at a thickness of 1 mm, 0.5 mm, and 0.3 mm gaps were used. The surface roughness was measured using the Surface Roughness Tester three times in each specimen and calculated as a Ra value (Roughness Average). The results showed that the variation in the spacing of the roll slit affected the roughness of the surface, but the change in the Ra value did not show a linear relationship. The change in roughness was related to the deformation of the plastic, the contact pressure between the roll and the material, and the roughness of the transfer during the rolling process. The use of an electric motor produces a more stable roll rotation so that the surface quality tends to be more uniform than that of the manual system. So that the regulation of the roll gap distance and material thickness are important parameters in producing silver surface quality according to the needs of the jewelry rolling press process.]]>
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