Originally Posted by
Atomic_Sheep
Aluminium 2 Me 0... decided to drill along the cut to easily saw the bit, broke the drill bit, was a 3mm drillbit. Started with ~600mm/min plunge @9000rpm as per GWizard, the Z axis was jumping around like crazy... would bend under pressure when inserting, then it would bounce back once the drill bit penetrated the material, slowed it down to 400, still was jarring the Z-Axis, slowed it down to around 200mm/min (I think this is what HSMAdvisor recommended), seemed to be going better, but still broke the bit in the end.