Eccentric grinding device with: - an output shaft (20) rotatable about an axis of rotation, - A grinding plate (40) which is arranged eccentrically to the axis of rotation and is detachably fastened to the output shaft (20) by means of a screw connection, and - A flat grinding wheel (50), in particular an abrasive paper, which is interchangeably attached to the grinding plate (40), characterized in that the screw connection has a single fastening screw (36) which is formed from a light metal material.
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