Grinding system comprising: - a grinder comprising an actuating arm adapted to receive an abrasive grinding wheel, an actuator coupled to the actuating arm to rotatably drive or translate it along a driving axis, an electronic control unit operatively coupled to the actuator and a transceiver unit coupled to the control unit and adapted to transmit electromagnetic signals, and - the abrasive grinding wheel fixed to the actuating arm of the grinder, the grinding wheel comprising a body which has at least one abrasive surface intended to come into contact with a workpiece to be machined, a further surface opposite to the abrasive surface and a side wall separating said surfaces (11, 13), both surfaces (11, 13) being substantially circular with corresponding areas, and have a diameter greater than a height of the sidewall separating them, and an electronic unit which is integrated in the grinding wheel coupled to the body, said electronic unit comprising a resonant circuit, wherein the transceiver unit is located in the grinder separated from the abrasive grinding wheel in a position radial to the grinding wheel, characterised in that the transceiver unit of the grinder comprises a single resonant circuit arranged aligned along an axis parallel to the driving axis of the actuating arm, and is positioned at a distance in the order of centimetres from the side wall of the grinding wheel mounted on the actuating arm, and the resonant circuit of the electronic unit has a resonance frequency which differs by a maximum of 15%, preferably by a maximum of 10%, from a resonance frequency of the single resonant circuit, so as to allow an exchange of information between the electronic unit of the grinding wheel and the transceiver unit of the grinder, and wherein the resonant circuit of the transceiver unit is such to couple electromagnetically with the resonant circuit of the communication circuitry along the entire travel allowed, in use, to the abrasive grinding wheel fixed to the actuating arm. - a grinder comprising an actuating arm adapted to receive an abrasive grinding wheel, an actuator coupled to the actuating arm to rotatably drive or translate it along a driving axis, an electronic control unit operatively coupled to the actuator and a transceiver unit coupled to the control unit and adapted to transmit electromagnetic signals, and - the abrasive grinding wheel fixed to the actuating arm of the grinder, the grinding wheel comprising a body which has at least one abrasive surface intended to come into contact with a workpiece to be machined, a further surface opposite to the abrasive surface and a side wall separating said surfaces (11, 13), both surfaces (11, 13) being substantially circular with corresponding areas, and have a diameter greater than a height of the sidewall separating them, and an electronic unit which is integrated in the grinding wheel coupled to the body, said electronic unit comprising a resonant circuit, wherein the transceiver unit is located in the grinder separated from the abrasive grinding wheel in a position radial to the grinding wheel, characterised in that the transceiver unit of the grinder comprises a single resonant circuit arranged aligned along an axis parallel to the driving axis of the actuating arm, and is positioned at a distance in the order of centimetres from the side wall of the grinding wheel mounted on the actuating arm, and the resonant circuit of the electronic unit has a resonance frequency which differs by a maximum of 15%, preferably by a maximum of 10%, from a resonance frequency of the single resonant circuit, so as to allow an exchange of information between the electronic unit of the grinding wheel and the transceiver unit of the grinder, and wherein the resonant circuit of the transceiver unit is such to couple electromagnetically with the resonant circuit of the communication circuitry along the entire travel allowed, in use, to the abrasive grinding wheel fixed to the actuating arm.