Jesse L Zufall wrote:

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

Sounds to me like it's time to find a magnetic base drill. Try a tool
rental outfit. Try calling any local contracters that deal in steel
construction.

Alternatives:
Template and a plasma cutter- relatively clean cuts, fast, probably
going to require a small hole to start.
Oxy -Acet cutting torch - cheap and available, holes can be ugly if
operator is unskilled.

Cheers
Trevor Jones