Overhead blast gates

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Forum topic by Loren posted 692 days ago 2861 views 15 times favorited 9 replies Add to Favorites Watch
View Loren's profile


7400 posts in 2275 days

692 days ago

Here’s some blast gates I made. I cut up some of those black
plastic blast gates for the external fittings. The outside parts
are made out of 1/2” prefinished maple ply. The inside is 1/4”
markerboard, which I waxed. I’ve seen designs where the
builder used rubber gaskets but I wanted to keep it simple and
the rest of my ducting is far from airtight anyway.

The blast gates work really well and seal better than the
cheap plastic ones I made them from. Gates are accessible overhead
with a pull cord tied to each “ear”, I don’t have to walk around
my table saw to open the gate anymore. Also I can place
the gates closer to where the ducting makes a “Y” and thus
eliminate downstream leakage from having the gates at duct
drops at the ends of the ducting runs.


9 replies so far

View DIYaholic's profile


13271 posts in 1302 days

#1 posted 692 days ago

Nicely done.
I like the ease/convenience of operation. I’ll have to remember this one.
Thanks for sharing.

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procratination a bad thing?

View SASmith               's profile


1566 posts in 1614 days

#2 posted 692 days ago

This looks like a great solution, and self cleaning too.

-- Scott Smith, Southern Illinois

View Lee Barker's profile

Lee Barker

2163 posts in 1478 days

#3 posted 691 days ago

Elegant and clever. View Master Blast Gates. Nice work. I’m thinking of several places where these would be an improvement over what I have.



-- " his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

View Jerry's profile


2180 posts in 2174 days

#4 posted 691 days ago

Very nice work Loren. Glad to get to see these as we might be building blast gates of our own soon. I am on the fence with building blast gates or maybe purchasing blast gates. Great job!

Oh, and thanks for the tip on using Her-saf bits on that Panel Router. I have not purchased any bits yet but it is looking as though I will keep that Panel Router and so I will be getting it set up to take over dado cutting. Looking at the Her-saf bits looks like the way to go.

Hope things keep going great for your DC duct work.

-- Jerry Nettrour, San Antonio,

View Loren's profile


7400 posts in 2275 days

#5 posted 691 days ago

My cyclone isn’t all that powerful, so I’m obliged to try to keep
airflow only to one machine at a time… and also the filter clogs
quicker than I would expect. The reduction in suction sneaks
up on me since even when it’s pretty clogged it still gets
the nasty airborne dust pretty well.


View Andrew Pritchard's profile

Andrew Pritchard

9 posts in 475 days

#6 posted 39 days ago

How did you make the flanges to attach to the rest of the ductwork?

View NormG's profile


4094 posts in 1631 days

#7 posted 39 days ago

Great solution

-- Norman

View Loren's profile


7400 posts in 2275 days

#8 posted 39 days ago

Cannibalized plastic blast gates.


View TheWoodenOyster's profile


717 posts in 562 days

#9 posted 39 days ago

Like it. I might use those on my first DC system.

-- The Wood Is Your Oyster

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