Process

With drill thread milling, the combination tool pre-drills at the selected spindle speed and feedrate. The hole is produced in one operation down to the final drilling depth. The end point on the X and Y axes is calculated internally in the cycle. Optionally, a dwell time can be programmed at the end of the drilling operation.

The tool is then retracted at rapid traverse to the safety plane for chip evacuation. The tool is then prepositioned to machining depth less the pitch in rapid traverse. Milling then takes place in a helical motion G02/G03 until the specified machining depth is reached.

This is followed by the tool positioned in the drilling centre without dwell time at rapid traverse G00 and moved to the retraction plane.