A boring bar for a non-rotating boring tool, the boring bar comprising: - an elongated main part configured for attachment to a support structure of a metal cutting machine, the main part having a rear end and an opposite front end ; and - a front part having a rear end facing the front end of the main part and an opposite front end , the front end of the front part being arranged to carry a tool part provided with a cutting element , wherein: - the boring bar comprises at least one damping module arranged between the front end of the main part and the rear end of the front part , wherein the at least one damping module has a rear end facing the main part , an opposite front end facing the front part and a centre axis extending between the rear end and the front end of the damping module; - the at least one damping module is provided with an electrically controlled vibration actuator for active vibration damping of the boring bar , wherein this actuator is configured to generate vibratory forces; and - the front part is connected to the main part via the at least one damping module , wherein the main part , the front part and the at least one damping module together form an elongated body , and wherein the at least one damping module constitutes a length section of the elongated body ; - characterised in that the at least one damping module is clamped between the main part and the front part by means of tie rods , wherein each one of the tie rods has a first end fixed to the main part and an opposite second end fixed to the front part , the tie rods preferably extending through passages in the at least one damping module . - an elongated main part configured for attachment to a support structure of a metal cutting machine, the main part having a rear end and an opposite front end ; and - a front part having a rear end facing the front end of the main part and an opposite front end , the front end of the front part being arranged to carry a tool part provided with a cutting element , - the boring bar comprises at least one damping module arranged between the front end of the main part and the rear end of the front part , wherein the at least one damping module has a rear end facing the main part , an opposite front end facing the front part and a centre axis extending between the rear end and the front end of the damping module; - the at least one damping module is provided with an electrically controlled vibration actuator for active vibration damping of the boring bar , wherein this actuator is configured to generate vibratory forces; and - the front part is connected to the main part via the at least one damping module , wherein the main part , the front part and the at least one damping module together form an elongated body , and wherein the at least one damping module constitutes a length section of the elongated body ; - characterised in that the at least one damping module is clamped between the main part and the front part by means of tie rods , wherein each one of the tie rods has a first end fixed to the main part and an opposite second end fixed to the front part , the tie rods preferably extending through passages in the at least one damping module . <EOS>