A generating process in which a cutter shaped like a gear strokes up and down across the blank while both rotate together as if meshing. Because the stroke needs very little runout, shaping cuts internal gears, cluster gears and teeth next to shoulders that a hob cannot reach. It is slower than hobbing for plain external gears.
Heard on the job
Cluster gear has a shoulder right up against the small teeth, so it has to go on the shaper, the hob will hit.
Also heard as
- shaping
- Fellows shaping
Related terms
Hobbing
Generating gear teeth with a rotating worm-shaped cutter that turns in step with the blank.
Internal gear
A gear with teeth cut on the inside of a ring, meshing with a pinion running inside it.
Power skiving
Cutting gear teeth with a gear-like cutter spinning at a crossed axis angle in continuous high-speed rotation.