Boring bar and a non-rotating boring tool and a boring arrangement comprising such a boring bar

A boring bar for a non-rotating boring tool, the boring bar comprising:

• an elongated body configured for attachment to a support structure of a metal cutting machine, the elongated body having a rear end and an opposite front end, the front end being arranged to carry a tool part provided with a cutting element;
• and
• at least two electrically controlled vibration actuators for active vibration damping of the boring bar, each of the at least two actuators including a moveably arranged damping mass and being configured, by movement of the damping mass, to generate vibratory forces in parallel or at least substantially in parallel with a working axis of the actuator that is perpendicular to a centre axis of the damping mass, wherein each of the at least two actuators is a single-axis actuator having one single working axis, and wherein the at least two actuators are arranged with their working axes angularly offset from each other, wherein the at least two actuators are arranged in a longitudinal series in the elongated body with the centre axis of the damping mass of each one of these actuators coinciding or substantially coinciding with a longitudinal axis of the elongated body.