What is broaching?

Broaching is a metal-cutting production method using a multi-toothed tool, the geometrically defined cutting edges of which lie one behind the other and are graduated by one cutting thickness each time.

  • The relative cutting motion of the tool and workpiece with respect to each other is straight (vertical or horizontal) or helical.
  • The forward feed motion is realised by the rise per tooth.
  • The broaching process assigned to the tool is completed with one passage of the broaching tool.

In general, a distinction is made between two types of broaching:
Internal Broaching and Surface Broaching.

The superb advantages of broaching lie in the combination of the following properties:

  • High cutting performance
  • High reproducibility (dimensional accuracy)
  • High level of automation

For this reason, broaching is one of the most productive processes for highly-accurate and complex profiles in large series production involving metal cutting.

Broaching machines always have simple kinematics, require relatively low control complexity, provide short cycle times and have a very robust overall design.