ABSTRACT
An internal work gear-to-cutting tool mesh can also be employed for designing a gear cutting tool for machining an internal gear. The determination of a set of design parameters of a work gear is the start point in designing a gear cutting tool. The location of the gear body with respect to the tooth surfaces is the major difference of the geometry of an internal gear from the geometry of an external gear. Two principal reference systems are used when determining the generating surface of the gear cutting tool for machining an internal gear. Hobs for machining internal gears are produced by the industry. The line of action in the work gear-to-cutting-tool mesh is used to construct the continuous HS cutting edge CE of the gear-finishing tool. Internal gears can be shaved on special machines in which the work drives the shaving cutter or by internal shaving cutter head attachment on external shaving machines.
