Concrete Grinders Floor Grinding Machines The .
A singledisc grinder has a working width of 10 to 12 inches while a dualdisc unit covers 20 or more inches in one pass. Disc rotation speeds range from about 250 to over 3,000 rpm. On multipledisc units, the discs usually are counterrotating to provide balanced torque so the grinder won''t pull from side to side. For more even grinding, some machines are also equipped with floating heads ...