1）Adjust cutting condition according to the rigidity of machine or work clamp state.
2）Wet condition are for drilling with water soluble cutting fluid.
3）In non-water soluble cutting fluid, reduce the rotation and feed by 20%.
4）Non-step drilling is possibl
5）Non-step drilling is possible.
However, a work material and cutting condition to chip removal may be worse.
In that case, even if under predetermined hole depth, please step feed.
In step feed, return to the entrance hole.
Step feed interval is about 0.2~1×Dc.