Hi everyone,

I'm looking for advice on what drill bit material/coating I should purchase for use on a high-speed CNC router. I'm currently running an OmioCNC X8 capable of 24k spindle speeds, so any advice on whether cobalt, TiN, HSS, etc. would be appreciated.

98% of the time I'll be cutting 6061 Aluminum, 3/8" or thinner. Most holes drilled will be smaller than 1/4". A WD40 mist will be applied while drilling (and machining).

I'm pretty sure that the "best" solution for drilling using a CNC router is going to be carbide drill bits, but I'm trying to stay away from that for now due to the very high cost of carbide tools. The machine will cut about 100 holes per week as it's main purpose is prototyping, so tool life is important, but not critical.

Thanks in advance for everyone's help!