I am starting to use my homemade milling machine with a 2.2 kw chinese spindle. I need some help about the parameters to use to drill holes with standard HSS-co twist drills. I have tried to drill with 4mm diameters at 10000 RPM and 20 mm/min feed. It works but it looks quite slow, in fact chips are almost dust.
Hi increased speed to 40 mm/min, but I broke the drill. To be fair, I have the doubt that the drill was already damaged, but I can't be sure and I don't want to break more before listening to your opinion.
So what speed and feed do you suggest to use?