Mass damper device, working tool and working tool holder comprising a mass damper device

A mass damper device comprising:

• a tubular housing having a first and a second longitudinal end;
• at least one damping mass which is received in the tubular housing with a circumferential clearance and which exhibits a central bore;
• a first resilient element and a second resilient element,
• at least one end closure arranged at the first or second longitudinal end and exhibiting a respective central through opening,
• a coolant media tube which extends with a radial clearance through the central bore and is received in the central through opening of the at least one end closure, wherein
• the housing and the end closure have cooperating mounting surfaces which define a longitudinal mounting position of the end closure;
• and wherein
• the mounting surfaces are arranged such that the first and second resilient elements are compressed to a predetermined compression rate between the damping mass and the end closure, to thereby achieve a correct tuning to a desired nominal Eigen frequency of the damping mass, by mounting the end closure, at the longitudinal mounting position, to the housing.