Dust collection

[fshenkin94]

Anyone know the impact of going from a 4" hose down to 2.5" on a dust collection system? I have a 1hp collector that has a 4" port coming off of it. I was going to run the hose to a lathe, bandsaw and floor collection point. Can I downsizer the hose to 2.5 going to each collection point or does that adversely impact the collection ability?

 

[ctEaglesc]

Yep.
It wont work.Not enough CFM's to keep the dust in suspenension.
In an earlier thread regarding dust collection(I thnk it was your psot) someone replied with a link to Bill Pentz's site.
Based on your question maybe you missed it.
If you read the info there you will have the answer to this and a lot of other questions.

 

[beamer]

Eagle said it all ... DC's operate differently than Vacuums. Vacuumes move a little bit of air really fast. DC's move a whole lot of air ... You need enough hose to supply that appetite. Bill's site's the place to go

http://billpentz.com/woodworking/cyclone/Index.cfm

 

[Russb]

Do the research even at 4" you need a lot of CFM and a good size dust collector to put a system together.

 

[jaywood1207]

I'm not looking for trouble but I personally go from 4" to 2.5" and yes you do lose some suction but it does work but my 2.5" hose is only between 3 and 5 feet long. If you go longer you will see a huge difference in the suction. This is from my own experience only and not doubting or arguing with anybody elses opinion or experience.