Product Overview The CNC sink edge grinding and polishing machine utilizes the abrasive belt polishing principle. The abrasive belt is driven by an electric motor to conduct polishing on the edge of the welded sink, delivering a uniform, mirrored surface finish that meets the appearance standard required by kitchen sink buyers. Key Features Abrasive Belt Polishing: Electric-motor-driven abrasive belt polishes the sink edge evenly for a consistent finish. CNC Precision Path: