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That is the smallest dividing head that I know of. It fits on my larger milling machine but is too large for my Harbor Freight machine. For that I use a 4″ rotary table (in the vertical position) with the dividing plates and sector arm. The rotary table has a Morse taper hole in the center to accept a dead center. A centerdrilled shaft fixture goes on that end with a driving dog in contact with the table. The other end of the shaft fixture is held in by the tailstock. It accomplishes the same task. Roger Smith has a gear cutting video on Youtube using a shaft fixture but he has it mounted in a Schaublin Lathe. The concept is the same, just a different machine and setup.