Improvement of nesting tool

Good cutting performance, this is common, including the selection of tool materials, reasonable tool geometry parameters, but at the same time must take into account the unique personality of each tool, otherwise it will be inconvenient to use, or even unable to use. I have a product in our factory. I have to drill a φ24mm hole in a φ45mm, 2mm wall tube in one process. The special nesting knife shown in Figure 1 was then designed.