... .5HP 165kgs or 220KG 3)Siemens motor 4)One-body gearbox 5)gear and belt driven JS-550 top selling concrete polishers ... tool changing3,Counter rotating plates4,Siemens motor5,Aluminium alloy gearbox or steel gearbox as alternative, Both are thicker than others in the ... HRB bearing7,Wheel ajustable to different height8,Driven by both gear and belt9,With vacuum hose to connect a vacuum cleaner10 ...