Drilling hole in hard steel: Speeds? Feed? Lube?

[Erich]

I was cross drilling a 13/64" hole in the 7/8" diameter Pin on the tow bar I use to flat tow the Bronco.
Anyway, I used poor technique, the hole got hot, I heard a SQUEEAK and the drill stopped drilling.
I have purchased a 13/64 solid carbide drill.
My questions are: What RPM should I spin the drill? Should I use oil or run it dry?
I have black cutting oil or tap magic that is like a light oil.
I just need to get through the final 1/4 of the way through the pin.

The hole location was not critical so I just center punched and drilled in the drill press. I really don't want to flip the part over and come in from the other side because the holes will never line up.

 

[nihilistic]

oops didnt read that you were using a drill press, please read post below ignore my suggestion lol

 

[tnmgcarbide]

if you are drilling a 1/4 hole in "hard" steel , say 45rc ? with a "drillpress" i think you'd
be better off not wasting a fragile, expensive drill . those work great in a milling machine, but not good in a drillpress. a drill chuck is seldom capable of better than .003 TIR, and a carbide drill does not flex. . i'd suggest an m-42 cobalt screw machine drill @ 400 rpm , and stand on the feed , w/ cutting oil.

 

[Erich]

Good info. I can move the part onto a vertical mill. Giving it a try...........

Put the part in the mill vise, Indicated the hole. Carbide drill at 400 rpm with some brushed on cutting oil.
It went through the part with no noise, no drama. Just nice chips.

Thanks!