... for repairing, grinding, polishing, crystallizing millstones.diamond floor grinding machine HWG 70 has the quickest ... to 2000 rpm. The motor is 15 hp, and working area is 700 mm, ... time and labor.Performance:1,With 15 hp motor, it is good for grinding the ... medium grinding, fine polishing, crystallization, preparation, maintenance.2, Polish concrete, marble, granite, terrazzo with various grit of diamond ...