Seems to me I remember a magic 4000 linear feet per minute of
flow in a line to keep the bigger particles air born and moving
along. That works out to about 200 cfm of vacum cleaner, a HUGE
vac. My 2 hp Jet double bag dust collector is rated at 1200 (??)
cfm, works great on 4", starts getting bit wimpy on 5".

Jim Stewart wrote:

Harold & Susan Vordos wrote:

I'm not nuts about the appearance of concrete, so when we built the
current
shop, I chose to dye the concrete instead of paint it. I use a generous
amount of Oil-Dri, so my floor stays very clean, not oily. I also have a
built in vacuum cleaner system so it doesn't get dusty.


Did you use a purpose-build vacuum or a modified shop-vac?
I've been thinking about running 3" PVC around and connecting
it to a shop-vac in the loft. Do you know if there's a place
to get adapters to make something like this work? It probably
wouldn't be a big deal to turn adapters on the lathe if they
aren't readily available.