In article ,
says...

If it was me I'd be talking to any local water-jet or laser cutting shops
in your area as this is probably the fastest and most cost effective
means of making large holes in I-beams.

Ian

I have a 4x7.7 I-beam I need to drill a series of 1 3/8, 2" and 2 1/2" holes
through the web. What is the most productive means to accomplish this. I
have tried the BLU-MOL hole cutters but the noise is incredible and it is a
slow process. Need to cut the noise and increase the speed. I see where
Travers has circle cutters ..( 57-071-001) was wondering if anyone has ever
tried these and how the hold up.
I do have access to an small lathe and mill and am open to other
alternatives.

Jesse L Zufall
Silt Co