Drilling and Countersinking Endmills

[Winters636 (Pete)]

Drilling 5/64" Hole with 1/16" Endmill in Aluminum

Anyone have any recommendations for this? Material thickness is .190". I need to drill a large assortment of 5/64" holes and would prefer to us the CNC. I tried pocketing and got to my 4th hole and broke the cutter. I was stepping down about .019" at a time. It seemed to be going well and then it broke. Anyone have any suggestions or recommendations?

I used their drill mills for this project. They work very well and one endmill has drilled 1000’s of holes for me with no signs of stopping.