Abstract: A grinding unit assembly, a plurality of which is placed around a cylinder (12) of a grinding machine. Each assembly comprises a grindstone unit (1) and a metal fixture (16). The grindstone holder (3) has on one side face a positioning cutout (7), and a thinly cut grindstone (2) attached to one end of the grindstone holder (3). The metal fixture (16) has a metal body (17) having a protrusion (18) adapted to fit in the cutout (7) and a locking bolt (21).
Abstract: A grinding unit assembly, a plurality of which is placed around a cylinder (12) of a grinding machine. Each assembly comprises a grindstone unit (1) and a metal fixture (16). The grindstone holder (3) has on one side face a positioning cutout (7), and a thinly cut grindstone (2) attached to one end of the grindstone holder (3). The metal fixture (16) has a metal body (17) having a protrusion (18) adapted to fit in the cutout (7) and a locking bolt (21).