Drill and Facing in the process of machining centers

From Blogger Pictures

Meet again with my post, this time I want to discuss about the drill and facing. I find obstacles to use of the tool joint and drill facing (can be seen in the image above). At the same drill a hole through it is with the process of facing. Obstacle I faced was the age of the tools that I use can not last long (often broken)
Maybe it could be seen from the program like this:

N0300(INLET,S/F,D20.)
T3M6
G0G90G56X0Y0
G43Z10.H3S3300M3M8
G1Z3.F500T4
Z0.1F165
Z0S440F22
G4X0.5
G0Z50.
G91G28Z0M5M9M103

Note:
Z Zero To position contained in facing
Material is Aluminium casting

For that through this post I want to ask for help in finding a solution to the master's or designer of CNC tool