In micromachining process, the most expensive thing isn’t the drill—it’s the scrapped workpiece it leaves behind.
When you’re working with diameters under $0.2mm$, the margin for error is zero. Most shops struggle with “The Snap” because of microscopic T.I.R. (Total Indicated Runout).

The Fix: Is your tool holder runout under $0.002mm$? If not, you aren’t drilling; you’re vibrating the tool to death. Stop blaming the carbide and start checking the spindle.

MSU offer high performance micro carbie drills which made by extra fine grain size carbide, and strictly controlled tolerance and runout during the production. it will be not break during the micro drilling process if your cutting parameters fixed well and achieve high efficiency drilling. 

Please click MSU carbide dirlls for detailed information. 

Micro Carbide Drills