Overhead blast gates

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Forum topic by Loren posted 09-30-2012 04:24 PM 10781 views 19 times favorited 11 replies Add to Favorites Watch
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10388 posts in 3645 days

09-30-2012 04:24 PM

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.

11 replies so far

View DIYaholic's profile (online now)


19620 posts in 2673 days

#1 posted 09-30-2012 04:31 PM

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 procrastination a bad thing?

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1850 posts in 2985 days

#2 posted 09-30-2012 04:58 PM

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

-- Scott Smith, Southern Illinois

View Lee Barker's profile

Lee Barker

2170 posts in 2848 days

#3 posted 09-30-2012 11:10 PM

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 ,'s profile


2387 posts in 3544 days

#4 posted 10-01-2012 12:07 AM

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.

-- .

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10388 posts in 3645 days

#5 posted 10-01-2012 12:14 AM

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 1845 days

#6 posted 07-15-2014 01:26 AM

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

View NormG's profile


6111 posts in 3001 days

#7 posted 07-15-2014 01:33 AM

Great solution

-- Norman - I never never make a mistake, I just change the design.

View Loren's profile (online now)


10388 posts in 3645 days

#8 posted 07-15-2014 02:04 AM

Cannibalized plastic blast gates.

View TheWoodenOyster's profile


1317 posts in 1933 days

#9 posted 07-15-2014 02:12 AM

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

-- The Wood Is Your Oyster

View tyvekboy's profile


1752 posts in 3011 days

#10 posted 12-26-2014 08:24 PM

Hi Loren

How come you didnʻt post this in the projects section? Great idea.

-- Tyvekboy -- Marietta, GA ………….. one can never be too organized

View Fred Hargis's profile

Fred Hargis

4985 posts in 2491 days

#11 posted 12-26-2014 09:36 PM

I do like that. Well thought out!

-- Our village hasn't lost it's idiot, he was elected to congress.

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