Don't be frightend of feed.
Running at 3500 rpm, with flood coolant after drilling a 5mm hole in stainless steel
I accidentally (by not re zeroing the tool) I plunged a coated drill 6mm down into the 5mm hole at 1500 mm/min (60 IPM) and there was a hell of a shudder as the HP went up, but it seemed to finish the last 2mm of depth without any drama so I let it run.
Examined the hole. Perfect !
Examined the drill. Perfect !
That was a chip load of 0.2mm (0.008") per flute. Worked fine !
I think I am probably HP limited.
I have had a few rapid sequences before, (due to brain in neutral) and the only exciting one that busted a cutter was carbide 10mm cutter (ouch !) into a clamping bolt. The bolt unscrewed and the cutter shattered.
Same chip load in steel is a bit high for that size cutter.
Screaming through aluminum at 700mm/min (27 IPM) with a DOC of 1/3rd cutter diameter above appears quite exciting on my SX3.
Flood coolant must hide the impending noise is a must. I have rubber curtains, so I only know what happens after the noise !:withstupi
It is surprising how hard you can push things. The only thing that seems to limit you is the bending loads on smaller diameter cutters.
WIND UP THE FEED ! Wheee.....:wee:
Super X3. 3600rpm. Sheridan 6"x24" Lathe + more. Three ways to fix things: The right way, the other way, and maybe your way, which is possibly a faster wrong way.