What type of teeth on a broach are designed for final finishing cuts?

Finishing teeth on a broach are specifically designed to make final finishing cuts, which means they provide the smoothest surface finish and the closest tolerances. These teeth are typically located at the end of the broach and are engineered to remove just a small amount of material, refining the part's dimensions and surface quality after the rough cutting has been completed.

Cutting teeth, while important, serve primarily for the bulk removal of material rather than achieving precision finishing. Rough teeth, similar to cutting teeth, are optimized for rapidly removing larger amounts of material during initial passes. Leading teeth may aid in guiding the broach through the material, but they do not perform the specific function of achieving a final, polished finish.

Thus, finishing teeth are essential for producing the detailed and refined characteristics of a part after the initial machining processes, ensuring both dimensional accuracy and a superior surface finish.