[114Klutz]

I'll begin this post by saying I'm an animator - and know little about hardware.

During the course of build season, I was instructed to drill 'speed holes' through sprockets. 3/2 inch thick sprocket hubs. The drill press worked fine - and although making quite a few screeching noises, drilled through the sprocket hub.

Alarmed by the screeching noise of the drill press, one of the more mechanically inclined members came in and tried to cool the superhot sprocket with cutting oil. He attempted to drill through it again, stalling the drill press.

Later - I realized the reason that I managed to drill through it so easily was that I didn't use the cutting oil - thus not hardening the steel. This allowed me to easily chew through it while the more mechanically inclined members stalled the press.