Thanks for the replies! It looks like I will be saving the monster motor for yet another project.
No hard feelings here, I know how to cut and weld steel, I know nothing about cyclone`s. That is the reason I posted! I wanted/needed to find out from the one`s here that know about how Cyclones are built, and how they work.
The reason I was looking in to up sizing this was because sometimes two machines are running at once, and I thought that you add the 2 together to figure out how much dust collecting power one needs.
As for buying a large one, the one I looked at was more then $4500, and that did not include any duct work.
If you all (Mainly the resident expert Bill Pentz) think the 5 hp 18" is about right then, that is all bigger I want. I was not real excited about the 46 Amps that 15 hp motor was going to pull.
If I read you correctly Bill, you are saying that I need to neck down the duct some? If all the trunk line is 6", should I use the dust pickup that came with the machine? even if it is 2", 3", or 4"?
Thanks again!
one more thing, how about having it outside? Isn't the Leeson 5hp open drip proof? Would you recommend building a roof over it?