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Low Cost DC blast gates

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Project by Div posted 07-03-2010 10:00 PM 3479 views 11 times favorited 15 comments Add to Favorites Watch

Where I live there are no Woodcraft shops or similar. You guys are lucky to have them! Many times we have to invent our own devices. This is how I made my DC blast gates.

The wooden squares are ¾” plywood, hole size to suit pipe. I use 4” PVC piping from the building industry. The gates were made from some aluminum sheeting I had. I guess 1/8” plywood can also work. The one square is rebated to the same thickness as the gate. The two squares are screwed together with the gate in between.

I added a bolt to the gate to act as a stopper, thus preventing the gate from sliding out all the way. Screws and silicone attach the wooden squares to the pipe.

I am now toying with an idea for semi-automatic gates but I first have to try it out. In the meantime these ones are working just fine.

Hope someone finds this useful!

-- Div @ the bottom end of Africa. "A woodworker's sharpest tool should be his mind."





15 comments so far

View Cher's profile

Cher

936 posts in 1816 days


#1 posted 07-03-2010 10:13 PM

Hi Div, you are an asset to yourself. Night owls again.

-- When you know better you do better.

View sras's profile

sras

3911 posts in 1852 days


#2 posted 07-03-2010 10:22 PM

You have a feature that I wish my store bought gates have. That is a slot to push dust out. I happened to buy the type where I have to clean out the groove to get the gate to close all the way. Nice project!

-- Steve - Impatience is Expensive

View stefang's profile

stefang

13530 posts in 2057 days


#3 posted 07-03-2010 10:27 PM

Hi Div. That’s a fine idea. It’s one of those things that many would say ‘why didn’t I think about that?’ But you actually did. I also like to make stuff because it’s hard to find many things where I live too. Well done.

-- Mike, an American living in Norway.

View Div's profile

Div

1653 posts in 1663 days


#4 posted 07-03-2010 10:38 PM

Hey guys, glad you like the idea, that is the purpose of the posting!

Cher: Hello night owl… and goodbye. I am having an early(?) night, signing off now.

-- Div @ the bottom end of Africa. "A woodworker's sharpest tool should be his mind."

View Cher's profile

Cher

936 posts in 1816 days


#5 posted 07-03-2010 10:39 PM

Hi Div, you off to watch TV..lol

-- When you know better you do better.

View Chuck Anstrom's profile

Chuck Anstrom

72 posts in 1747 days


#6 posted 07-03-2010 11:54 PM

Looks great. How is the hose connected? It appears from the picture, the hose is connected to a female connection. How is it fastened? Thanks for sharing.

-- Chuck Anstrom - Virginia

View sras's profile

sras

3911 posts in 1852 days


#7 posted 07-03-2010 11:58 PM

You have a feature that I wish my store bought gates have. That is a slot to push dust out. I happened to buy the type where I have to clean out the groove to get the gate to close all the way. Nice project!

-- Steve - Impatience is Expensive

View woody57's profile

woody57

645 posts in 2150 days


#8 posted 07-04-2010 12:42 AM

great idea

-- Emmett, from Georgia

View PCM's profile

PCM

133 posts in 1768 days


#9 posted 07-04-2010 06:27 AM

Although your design is good, I have suggestion to improve it. Your stop bolt does not allow the gate to open fully which restricts air flow. Make the frame rectangular, and the notch the 4” circular cut out. The gate will fully open and yet still have stop to prevent it from coming out.

View lilredweldingrod's profile

lilredweldingrod

2495 posts in 1829 days


#10 posted 07-04-2010 09:22 AM

Not only did you come up with a great idea, yours will probably still be at work when the cheap plastic things are in the landfills. Rand

View Div's profile

Div

1653 posts in 1663 days


#11 posted 07-04-2010 05:50 PM

Chuck Anstrom, I have a female PVC connection on the machine side. This fitting comes standard with an internal rubber flange, meant for a push on watertight fit onto standard 4” PVC Pipe. The hose I use is a tight fit into this as well. There are many ways to skin this cat!
I have stretched and formed PVC pipe by carefully heating with blow torch. Keep flame far enough away so you don’t scorch and rotate pipe all the time untill soft.

PCM, very thoughtful input, especially if airflow is minimal. My DC system sucks like a hurricane, so I’m not too worried. Will definitely add your suggestion when I make more. Thanks for the idea.

-- Div @ the bottom end of Africa. "A woodworker's sharpest tool should be his mind."

View Monty's profile

Monty

12 posts in 1632 days


#12 posted 07-04-2010 10:14 PM

Hi Div ek is bly ons het ouens met goeie idees. Dit inelk geval atlyd beter en goedkoper is die gekoopte goed.

View BTKS's profile

BTKS

1971 posts in 2187 days


#13 posted 07-06-2010 02:55 AM

Good work. I’m about to start hardlining my DC in the shop. These are a great idea. Even with woodcraft and other retailers the

-- "Man's ingenuity has outrun his intelligence" (Joseph Wood Krutch)

View mafe's profile

mafe

9621 posts in 1812 days


#14 posted 07-19-2010 12:27 AM

Really cool, have to do some when I find the hours.
Thank you!

-- Mad F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

View nomercadies's profile

nomercadies

533 posts in 1061 days


#15 posted 11-07-2013 11:22 PM

Love it. Do you draw in air through the open slot on the side created by sliding the door open? Seems you would lose suction if there was a slot open like that, or do you cover the slot with something when the system is running?

I AM going to do that. Nice job.

-- Chance Four "Not Just a Second Chance"

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