For grooving, high productivity is the goal. External grooving is generally less demanding than parting off and because of this, process security is easier to achieve. This allows the focus to be moved to improving productivity, especially for wide grooves since they take more time and make a bigger impact on the component’s total machining time than small grooves.
External grooving methods
For deep grooves process security can be a challenge due to the long overhangs required, difficulties with chip evacuation and difficulties ensuring coolant access to the cutting edge. Single cut grooving is the most economical and productive method of producing grooves. However, if the width of the groove is larger than the width of the insert, multiple grooving plunge turning, ramping or profiling can be used to make the groove. For external grooving, a tool with high precision coolant is first choice.