AN ABRASIVE DISC FOR A MULTIPLE DISC GRINDING MACHINE, AND A GRINDING MACHINE INCLUDING SAID DISC

摘要

An abrasive disc for a multiple disc grinding machine is described, comprising a disc-shaped support having a circumferential rim on which the abrasive material is placed and an opposing central hole for fitting on to a driving shaft of the grinding machine, the hole extending through the thickness of the disc-shaped support. A portion of the central hole has a diameter greater than the diameter of the connection to the shaft, such that an annular chamber is formed in the thickness of the support. The disc includes at least one radial recess formed on a front surface of the disc-shaped support and extending from the annular chamber towards the circumferential rim of the disc, in such a way that a coolant fluid fed into the driving shaft can accumulate in the annular chamber and then flow through the radial recess towards the abrasive edge of the disc.