CON ROD

A con rod for a hammer drill characterized in that the con rod (206) is made in a one piece construction from sintered steel. The con rod (206) can be impregnated with a lubricant. The lubricant is oil and/or grease. Such a con rod can be used in a hammer drill comprising; a housing (2); a tool holder 98) mounted on the housing (2) which is capable of holding a cutting tool (12); a motor (48) mounted within the housing (2); and a hammer mechanism comprising: a crank plate; a con rod pivotally connected at one end to the crank plate and pivotally connected at the other end to a piston; wherein the piston (204) is slideably mounted in the housing and which is reciprocatingly driven along a longitudinal axis (154) by the motor via the crank plate and con rod when the motor is actuated;a ram mounted in the housing forward of the piston, which is reciprocatingly driven on the longitudinal axis by the reciprocating piston via an air spring (170); a beat piece (156) supported in an axially slideable manner on the longitudinal axis within a beat piece support structure (150, 210) which, during the normal operation of the hammer mechanism, is repetitively struck by the ram and which transfers the impacts to a cutting tool when held by the tool holder.