Yes, speed is everything when it come to drilling. Our drill press has 12 speeds but often there is nothing that is correct for the material being drilled so we then use the mill with infinitely variable speed. With the right speed most everything can be drilled with a HSS drill with no need for cobalt or carbide. Have drilled through leaf springs and spring steel bumpers without a problem. Usually use the old sulfur base cutting fluid for small jobs or hook up the fluid pump for big jobs. The fluid in the pump reservoir takes a cup of concentrate to a gallon of water and is much easier to clean up than oil base fluids.
