Abstract: There is described a grinding wheel (1), particularly for grinding operations carried out on sheets of glass (2), ceramic material or similar materials, comprising a disc-shaped support with abrasive material arranged on the circumferential profile of the support, and an opposing central hole (3) for attachment to a drive shaft (4) of the grinding wheel. The disc-shaped support comprises a pair of opposed disc-shaped grinding wheel bodies (5, 6) coupled in a facing position so as to define together the abrasive grinding surface (5c, 6c) along the circumferential profile, and each of the disc-shaped bodies (5, 6) has a predetermined resilience such that the disc-shaped bodies (5, 6) can be flexed away from each other in the zone of contact with the component being ground, for the purpose of consequently applying pressure to the component in the grinding operation.

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

Abstract: A grinding wheel is described, particularly for grinding work at a high feed speed, including a discoid body between the axially opposed faces of which an outside wall of cylindrical profile is defined, bearing the abrasive grinding material. The abrasive material is disposed circumferentially on the outside wall without a gap. The grinding wheel also includes a plurality of ducts extending radially in the discoid body, opening onto the outside wall and also passing through the abrasive material, so as to constitute ducts for conveying a cooling and/or lubricating liquid onto the abrasive outer surface of the outside wall.

Abstract: A tool for cutting stone materials, porcelaneous stoneware, glass and the like. The tool includes a support having a transverse thickness with respect to the direction of cutting and abrasive segments attached to the support and made from a mixture of abrasive material and binder. The segments are positioned in sequence along a cutting edge of the support, project from the support, and define a first and a second plurality of segments. One or more segments of the first plurality alternate with one or more segments of the second plurality in sequences which are repeated along the cutting edge. The segments of the first plurality have a greater thickness than the segments of the second plurality, and the abrasive material from which the segments of the first plurality are formed has a smaller particle size than the abrasive material from which the segments of the second plurality are formed.

Abstract: A tool, particularly for milling operations, capable of being driven in rotation about its own main axis. The tool has a core provided with a plurality of abrasive elements extending from the core radially to the axis and spaced apart from each other angularly. Between at least one pair of abrasive elements adjacent to each other is provided at least one respective gap in the form of a cut extending radially in the core to a predefined distance from the axis.