dust collection pre-separator setup

[Joe Caff]

So I'm setting up the preseparator for my dust collector. In the picture, the center opening is straight, while the perimeter opening has an elbow inside the can. Should I direct my inflow to the center (straight) or into the elbow for maximum chip separation?

TIA,

Joe
pre-sep.jpg

[Mikail Khan]

Outer elbow. This will allow centrifugal force to keep the dust particles on the side of the drum while the center pipe sucks clean air.

MK

[Joe Caff]

Thanks, Mikail.

[Robert Delhommer Sr]

Check out this site http://www.jpthien.com, all you want to know about Thien style separators. They work great, love mine.

[Jim Dwight]

My experience is they work well to separate chips but don't do a lot to separate dust which clogs filters. Cyclones do better with the fine dust. But they cost more in dollars and space too.

[Bruce Wrenn]

Google "Another Vote for Phil Thiens Baffle" to see the first "Top Hat" design. Pictures show results of using it.