Thread Milling with Helical Interpolation

Thread milling with helical interpolation is a process that allows the ability to machine threads as an alternative to rigid tapping. Sometimes, rigid tapping is not feasible due to the power requirements to machine the specified thread size or simply the hardness of the material.

Using a form shaped milling cutter with the same pitch as the thread and combined with helical interpolation, the form of the thread is generated. In order to machined threads using this method, a live tool is required. In other words M or Y specification is required in any CMZ lathe series.

If the hole to be machined is in the centre of the spindle, Y axis can be removed from the machine specification. In this case, a special program would need to be written to combine the Z and C axis movement together with the tool rotation. In any other case Y axis is necessary.

To help with the programming of this machining feature, CMZ supplies a standard macro program in all CNC lathe series with M or Y specification.