| 409 / | HD | GEAR CUTTING, MILLING, OR PLANING | 
| 1 | DF | GEAR CUTTING {11} | 
| 10 | DF | .~ Gear tooth shape generating {7} | 
| 11 | DF | .~.~ Hobbing {5} | 
| 17 | DF | .~.~.~ Including infeed means {2} | 
| 22 | DF | .~.~.~.~ To infeed radially of axis of work rotation {1} | 
| 23 | DF | .~.~.~.~.~ Infeed of cutter {1} | 
| 24 |  | .~.~.~.~.~.~ And infeed tangentially of work axis |