homemade blast gates

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Project by Greedo posted 12-19-2010 10:38 PM 7821 views 12 times favorited 7 comments Add to Favorites Watch

here are the 2 blast gates for my new dust colection system that i made,
they are made of left over plywood, it’s relatively simple to make.
i made a template first, wich allowed me to copy the round opening on the 11 parts that i needed to make using the router table.

7 comments so far

View wdh's profile


55 posts in 4119 days

#1 posted 12-19-2010 11:55 PM

Nice job on the blast gates. I made several for my dust system too but they were a little simpler. What’s your new dust system like?

-- Wayne,Saint John,NB

View jockmike2's profile


10635 posts in 4725 days

#2 posted 12-20-2010 04:17 AM

very good idea.

-- (You just have to please the man in the Mirror) Mike from Michigan -

View Robsshop's profile


921 posts in 3453 days

#3 posted 12-20-2010 10:31 AM

I don’t know why I haven’t made these for Myself considering how much store bought ones cost ? After seeing Your well crafted design I will make the effort to do the same ! Thanks for the inspiration . Nice work !!

-- Rob,Gaithersburg,MD,One mans trash is another mans wood shop treasure ! ;-)

View Greedo's profile


473 posts in 3439 days

#4 posted 12-20-2010 01:20 PM

thank you for the nice comments!
my new, and first proper dust collection system is based on water pvc pipes 100mm. i know of the suspected danger of this, but a thorough internet search made me come to the conclusion that it’s in fact harmless.
my 2hp DC sits above the workspace, and there is one line of pipes that ends between the jointer planer and tablesaw. and in the middle it goes down along the wall between the miter saw and mortiser.
there are only 2 blast gates, one for the tablesaw and one for the miter saw and mortiser, the planer jointer is always connected.
what is funny is that the succion is greater when all the gates are open, the cyclonic motion of the dust in the transparent bag decreases as soon as i close any of the gates. so i may just leave them all open.

View Bluepine38's profile


3387 posts in 3564 days

#5 posted 12-20-2010 08:56 PM

My 1 HP DC has a 6in or 152cm inlet pipe on it, your 100 cm inlet on a 2 HP motor could be cutting the air
intake back to the point that it would operate better with all the blast gates open. The experts say that
the pvc can cause static electricity and a spark can cause wood dust to explode. As one man said if it was
not for bad luck, I would not have any luck at all. Remember Murphy’s law “Whatever can go wrong will
go wrong at the worst possible time.” and also Gus’s fact,”Murphy was an optimist.” I am not saying you are
wrong, just that the odds are not in your favor.

-- As ever, Gus-the 80 yr young apprentice carpenter

View Ken90712's profile


17707 posts in 3667 days

#6 posted 12-21-2010 11:42 AM

Well done, Looks good.

Research says were more likely to get a fire in the colloction area of our dust collection systems or inside the table saw than the pvc pipes from static electricity. It would be almost impossible to achieve the fuel air mixture required for the pvc to cause this type a fire. I have read all kinds of info on this like you and talked with my buddy who is the head Bomp Tech for the FBI here in Los Angeles and he agrees. I figure he’s pretty up to date being he’s retiring soon and he is still alive. Nice work.

-- Ken, "Everyday above ground is a good day!"

View Speednork's profile


65 posts in 3871 days

#7 posted 12-21-2010 04:33 PM

Nice job.
I am with you. The dangers of using PVC is a myth.

-- In the time it takes some people to plan a project they could have built the project. Work from within not from paper.

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