shop dust control : building a pre sepperation drop box - Striper Talk Striped Bass Fishing, Surfcasting, Boating

Rockfish9 · 11-11-2011, 07:09 AM

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Rockler sells the kits to do this. $20

Dust Right Vortex 4'' Dust Separator Components, with FREE Downloadable Plan! - Rockler Woodworking Tools

I had one of those on the 850... it's way too small for a system with a 6" main trunk...but worked fine on the smaller system..

Rockfish9 · 11-14-2011, 10:02 AM

the blue print and calculations came from woodshop dust control..

I had a space planned out where i wanted to fit the box after relocating some of the machines and re routing some of the branch drops..

I would advise anyone making a box or using a store bought cyclone to be sure your collector can handle it a 1 -2" drop in static pressure will be encountered... you may have to up grade your duct work ( going up one size in main trunck and branches and keeping the runs straight makes huge differance) a single 4" 90 has the equivilant to 6' of straight pipe.. 5" the same as 9' of pipe and 6" the same as 12' of pipe... although as diameter increases the amount of resistance decreases.. these are the values of the straight pipe.. 4" = .055 ..5"=.042 and 6" .035 )..these values are for main branch pipe.. branch values are slightly higher..

after crunching the numbers ( Blower cfm divided by 500 then multiplied by 144) this number was then divided by my known number(desired depth of the box -24")..I figured my 1500 cfm blower could handle a 24 X 36 X 18" box... the bin size can be as large as you desired... for convieince... I went with a 24" X 24 box... the size of the baffle is directly equal to the size of the box.. .. which I made 18"..These formulas came curtosey of information obtained from the book wood shop dust control.

I made the entire unit out of left over scaps of 7/16 sheathing.. 3/4 ply wood would have been eaiser to work with ( less bracing and gussets) but I did this on the cheap.. buying only hinges 2" casters ( for the chip bin) a counter sunk pull handle , some weather stripping and two 6" 90 take offs as well as a few tubes of liquid nails and silacone...
The total cabinate is 2'X2' X4'.. the air chamber is 24X24 X 18... the baffel is centered and is 18" X 23 3/8..the entied box is glued, screwed ( the strength and seal is in the glue.. use plenty) and sealed...

internaly I have set cleats to rest the chutes on. the rear chute provides and edge above the bin.... these are set @ the 18" mark from the top... thus extending below the baffell.... the chute boards are set @60 degree angle... after installing opposing 6" take offs ( glued and screwed) I sealed the top of the box...

aftter attaching sealing cleats to the sides and botton.. it alowed for a 20" X 20" chip box with 2" castors... a 60 gallon trash can liner fits the inside.. i found by lightly spraying the inside I can form the bag to the corners of the box ...

First set of pictures show the top the air box portion of the cabinate.. as I said... the chutes ( which look flat in the picture but are not) angle down @ 60 degrees towards the center.. the top of the chute is set @ 18" ( or even with the bottom of the baffell)..

also shown are the door seals and door locking /sealing set up

Rockfish9 · 11-14-2011, 10:04 AM

these picturs are of the chip bin... it is made to just fit the lower chamber

Rockfish9 · 11-14-2011, 10:08 AM

these show the unit in place and all hooked up.. and the bin in place.... in the bag a. the debris i swept from the floor and sucked into the box via my floor speep... included in the trash... two 1" hole saw cut offs... a woodedn q tip ( used to clean my air brush) scres, metal shaving and sawdust from the project..