Pro Co of use of using parabolic drill in 4140

[doug8cat]

I have to drill sevral 5" deep 0.25 dia. holes in 4140. I am worried about chip evacuation . Would a parbolic drill be a good choice. I have never used them before, any advise would be appreciated.

 

[Mtndew]

What machine is this on? If it's a lathe or horizontal mill, then you can use any type of drill with Parabolic being the 2nd best choice next to TSC solid carbide.
Vertical mill I wouldn't touch this unless I had TSC and a solid carbide drill,not worth the headaces.