A reaming device comprising a shaft with a mounting portion, the mounting portion having an outer surface a carbon fiber layer located on the mounting portion outer surface an injection molded interface element for mechanical coupling of an external device molded on the carbon fiber layer, the interface element having a mounting portion wherein the carbon fiber layer extends over the outer surface of the shaft mounting portion and having an outer surface, wherein the carbon fiber layer outer surface has a non-smooth surface structure wherein the injection molded interface element mounting portion is injection molded over the carbon fiber layer surface structure The method according to claim 12, further comprising preparing of shaft mounting portion before wrapping a carbon fiber layer for establishing a reliable connection between the shaft and the carbon fiber layer.
