Our factory hob phyletic annular gear hob, such hob, spline Bob, before shaving, and cut the hob top hob, sprockets hob, also produce all kinds of worm and worm.

By optimzing process measures during machining the gear hob and worm hob, the hob's accuracy could be raised obviously result in the part's accuracy could be raised.

This paper explains the design analysis and its practical application by using gear hob to processing worm gear.