Milling tool and method for chamfering flank edges of teeth on a cylindrical toothed workpiece

A milling tool for chamfering flank edges of internal or external teeth on a cylindrical toothed workpiece at opposite end faces of the workpiece the milling tool (1) comprising:

• an elongated tool body, which at a rear end has a rear part configured for attachment to a machine and at a distance from the rear part having a cutting part provided with cutting edges that, the tool body comprising:
• an elongated shank part which carries the cutting part and extends from the cutting part towards the rear part and which has a front end facing the cutting part, an opposite rear end and a peripheral surface extending around the shank part between the rear end and the front end thereof, wherein the shank part has a longitudinal central axis that coincides with an axis of rotation of the tool body;
• and
• the cutting part being provided with at least one pair of cutting edges consisting of a first cutting edge facing away from the rear part and a second cutting edge facing the rear part and located closer to the rear part than the first cutting edge, wherein:
• the first cutting edge has a rear end and an opposite front end, the rear end of the first cutting edge being located closer to the rear part of the tool body than the front end of the first cutting edge, wherein the front end of the first cutting edge is located closer to the axis of rotation than the rear end of the first cutting edge and the distance between the first cutting edge and the axis of rotation is gradually increasing as seen in a direction along the first cutting edge from the front end thereof to the rear end thereof, and
• the second cutting edge has a front end and an opposite rear end, the rear end of the second cutting edge being located closer to the rear part (6) of the tool body than the front end of the second cutting edge, wherein the rear end of the second cutting edge is located at a longer distance from the axis of rotation than a radially outermost part of the peripheral surface of the shank part, and wherein the rear end of the second cutting edge is located closer to the axis of rotation than the front end of the second cutting edge and the distance between the second cutting edge and the axis of rotation is gradually increasing as seen in a direction along the second cutting edge from the rear end thereof to the front end thereof;
• the cutting part having an extension in the axial direction of the tool body limited to an area between a first plane that extends perpendicularly to the axis of rotation and intersects the rear end of the second cutting edge and a second plane that extends perpendicularly to the axis of rotation and intersects the front end of the first cutting edge;
• and
• the cutting part constituting an axially foremost part of the tool body or the tool body includes a front part that projects from the cutting part on the side thereof facing away from the rear part, and wherein the front end of the first cutting edge is located at a longer distance from the axis of rotation than a radially outermost part of this front part.