Tool, machine and method for producing roof ridge-shaped chamfers on teeth of an internally and externally toothed gearwheel

A method for producing roof ridge-shaped chamfers on the end faces of the teeth of an internal and external toothing of an internally and externally toothed gearwheel, wherein the method comprising the following steps:

• clamping two tools for producing roof ridge-shaped chamfers on teeth of an internally and externally toothed gearwheel respectively in a tool receptacle, wherein the tools comprise a finger-like tool carrier having a holding section, which is associated with an end face of the tool carrier and provided for fastening in a tool holder of a machine tool, and a chamfering tool chamfering tool, which is held on the end section of the tool carrier, said end section being associated with the other end face, and during use describes an impact circle with its cutting edge, the diameter of said circle being determined by the radial distance of the cutting edge of the chamfering tool from the axis of rotation of the tool, and wherein at least one further chamfering tool is attached in a middle section of the tool carrier which is offset relative to the end section provided with the chamfering tool towards the holding section of the tool carrier, said chamfering tool being held with its cutting edge at a radial distance to the axis of rotation of the tool, said radial distance being greater than the radial distance of the cutting edge of the chamfering tool held on the end section of the tool holder;
• adjusting the tools into a respective first working position, in which, having their chamfering tools seated on their end sections, they engage with the end faces of one of the teeth of the gearwheel, and
• adjusting the tools remaining in their tool holder into a respective second working position, in which, having their chamfering tools seated on their middle sections, they engage with the end faces of the other teeth of the gearwheel.