In the right application, using a thread forming extrusion tap can improve quality and productivity.
The most commonly accepted method of creating a threaded hole is to use a cutting tap
However, you can often produce better threads using a forming or extrusion tap.
The main advantages of using forming taps rather than cutting taps can be summarised as follows
- No material is removed during thread forming instead the material is displaced to form the thread.
- The thread formed has a smoother burnished finish.
- The threads produced are stronger.
- Thread forming taps are better suited for use in holes that are interrupted by longitudinal slots such as the ones commonly found in some Aluminium T Slot Extrusions.
- Actual thread sizes are usually closer to gauge limits
- The life expectancy of the tool is usually 20 times longer for an extrusion tap.
- Higher spindle speeds used with extrusion taps translate into higher productivity when cutting threads.