Hi,

I am trying to drill 500 off 2.395mm dia holes in an ali casting but the drill I am using keeps building up with swarf on the drill flutes after just one hole has been drilled.

I am using a special sphinx drill for this job but would like some help with why the drill is building up with swarf.

I am using a horizontal milling machine to do this job and I have tried the following speeds and feeds

S10000 F600
S10000 F400
S6000 F300

I am using G83 peck cycle with pecks on 3.5mm and the hole is 10mm thru.

I have also tried using thru spindle coolant and still no luck.

Any help would be appreciated.