For some reason, the drill press and I can't seem to get along. I was drilling some 5/16th holes in 3/8" steel plate the other day(with 1/8" pilot hole), and i could not get them to drill correctly. . The first hole went great. quiet and smooth. the rest I barly got drilled. The bit screeched, and would not cut. I tried another bit with similar results...lots of noise, very little drilling. I tried cutting oil...didnt help. Ii tried speeding up and slowing down the spindle speed, and that didnt help either. Any suggestions? Thanks.