Having problem with drilling 51 hole with 0.85mm drill. I tried to drill holes in one go I mean not turning detail, so i can be sure there will be no errors and top and bottom holes will be coaxial. But it is not working since Ive already broken 4 drillbits. Drill is OSG EX Gold drill cutting lenght is 5mm and shaft statrs only after 7mm. Any suggestions.
PS. there are 150 details to be machined.