I have serious troble drilling holes in 15n20, 3-5mm, i have tried 200-700rpm with coolingfluid and with different force but nothing seems working?
Steels like 01 and AEB-L is a pice of cake compared to this 15n20...?
Fortunately i know how to resharp my drills and to stop drilling before they turn blueotherwise i had to buy drills by the hundreds.
any tips would be appreciated!