LCT Paintball wrote:
I was poking fun, there are machines that require 660 VAC 3 phase, but
unless you are turning barrels for gunboats you aren't likely to need one.
Dan, U.S. Air Force, retired
Wow. I've seen lots of machines that run on 440, but never 660.
Dave Lyon
Bragging about his 4000 sq foot machine shop. 
Check out your local large ship building facilities. I visited the
Newport News yard when I was stationed near there in the 1970s. It made
me wonder about the shops they subcontracted to. Um, what is the
combination to the lock on your machine shop door?
Dan, U.S. Air Force, retired