In recent years, the automotive industry has been demanding high-efficiency processing of
gears in terms of the trend in the increase in the number of transmissions shipped and the number
of stages for multistage automatic transmissions. This trend is prevailing over not only the
automotive industry, but also manufacturers in all fields including construction machinery and
various reduction gears. With such a background, skiving cutting that mainly uses an internal gear
has been attracting significant attention recently. Mitsubishi Heavy Industries Machine Tool Co.,
Ltd. also developed the MSS300 super skiving machine, which has both the optimum machine
rigidity and control technology for skiving cutting. In addition, we developed a super skiving
cutter, which is advantageous for tool life, which tends to be a problem in skiving cutting. This
paper presents these gear cutting systems.
