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Shop Cleanup, Catch-Up, and Redo #4: Blast Gates - It works! It really does!

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Blog entry by sIKE posted 1023 days ago 3740 reads 1 time favorited 8 comments Add to Favorites Watch
« Part 3: Slow Progress but the Air Compressor line work is done (mostly) Part 4 of Shop Cleanup, Catch-Up, and Redo series Part 5: Dust Collection for Miter Saw Part I »

I was not very happy with my dust collection run and blast gate solution the last time around. So I put some thought into how I would make it better this time. First was I wanted gates that wouldn’t get clogged, and second I wanted to be able to easily open and close them without reaching under the bench. The first part was easy, I found some no clog gates a while back at WoodCraft.

As you can see I have drilled a hole on the side of the gate opposite of the wall. I am using a 2ft length of threaded rod and I have used three nuts to capture the rod on the gate. I then put the top back on the cabinet frame and drilled a hole through the top for the rod to go through. So you can guess my thinking is to use the rod to lift open and push close the blast gates. The challenge is gravity, when you lift up on the on the rod the gate it works as expected , but when you let go of the rod it falls back down and closes the gate. So I thought about several different solutions but this is the one I came up with. I bought 4 small Bessy spring clamps from the blue borg. I opened the clamp up with a piece wood that made the jaw roughly parallel to each other, and I then drilled a 15/32 hole as close to center on the end of the clamp as possible.

I then repeated this on the side of the clamp. You now should basically have a hole through the clamp. You should then open of the jaws of the clamp and place it over the threaded rod. I used my test clamp to keep the jaws open. I then pulled the rubber grip off of the bottom handled and then used a 1 1/2” screw with a finish washer through the hole in the handle. On the jaw end of the clam I used a flat washer and a Pocket Hole screw to hold the end of the clamp down onto the work bench. The main thing to be careful here is to make sure the bottom hole is not touching the threaded rod.

As you can see in the picture with the jaws closed the threaded rod is now in a bind.

To open the blast gate you would press down on the handle of the clamp and then use the handle on the threaded rod to lift up and open the blast gate, you would then let go of the clamp handle which would close and bind keep the handle in the up position, to close the gate you would just press down on the clamp handle and the threaded rod will fall closing the blast gate.

Let me know if you have any questions!

-- //FC - Round Rock, TX - "Experience is what you get just after you need it"



8 comments so far

View PurpLev's profile

PurpLev

8476 posts in 2244 days


#1 posted 1023 days ago

nice! I noticed in previous posts that you have quick a long run of DC pipes. I just rearranged my shop space today mainly because of poor DC performance that was caused by long runs of pipes (will post when done). ended up with a lot of LV blast gates (maybe use them in the future) hope this solution works for you. I reverted to relocating DC to right next to the machines.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View degoose's profile

degoose

6967 posts in 1950 days


#2 posted 1023 days ago

I have blast gates to all my machines… above…and have a cyclone… it all works great…
If I had my run under the bench then this would be a great addition…

-- Drink twice... and don't bother to cut... @ lazylarrywoodworks.com.au For lovers of all things timber...

View sIKE's profile

sIKE

1271 posts in 2349 days


#3 posted 1023 days ago

It is one straight run about 20 ft long. When done I will have only 4 blast gates. I am trying to keep this a simple as possible.

-- //FC - Round Rock, TX - "Experience is what you get just after you need it"

View sIKE's profile

sIKE

1271 posts in 2349 days


#4 posted 1023 days ago

Thanks larry! Next up is the plenum box for the Miter Saw based off of yours and Blankman’s solutions.

-- //FC - Round Rock, TX - "Experience is what you get just after you need it"

View Bearpie's profile

Bearpie

2584 posts in 1613 days


#5 posted 1023 days ago

Only problem I can see down the road is when you will need the table space and the dang clamp and rod are in the way! Good idea otherwise but I think I would have put the rod at edge of table?

-- Erwin, Jacksonville, FL

View sIKE's profile

sIKE

1271 posts in 2349 days


#6 posted 1023 days ago

Bearpie, They will be behind the board supports, this is Norms Miter Bench…..

Click for details

-- //FC - Round Rock, TX - "Experience is what you get just after you need it"

View PurpLev's profile

PurpLev

8476 posts in 2244 days


#7 posted 1023 days ago

Sike, I had 2 separate ~20 feet runs, 1 with a single large 90 bend, and 1 with 2 large 90 bends. I am now “downgrading” it to a 5ft-10ft run with blast gates per machine. I am interested to hear how this works for you down the line. for what it’s worth my run wasn’t very good, it went up above ceiling and back down to TS… performed pretty bad.

-- ㊍ When in doubt - There is no doubt - Go the safer route.

View sIKE's profile

sIKE

1271 posts in 2349 days


#8 posted 1023 days ago

Sharon,

My main problem was that my suicked :) really …

I did a lot of reading on the topic and at the time was concerened about the fire hazzard all the books talked about. So I dropped a nice dime on braided copper wire and ran it on the inside of my run. Just to let you know, all this did for me was to cause clogs. At the end of my run I used 45º elbows with 8” of straight pipe between them, then it is a straight shot up and then another long sweep 90 degree elbow. It of course is at the end of the run and is only for the belt sander and drill press. Neither produce copius amounts of saw dust/chips. The other devices are the RAS, Miter, Table Saws. The table saw solution is still forming, as for the RAS and Miter Saw I am going to deploy a plenum chamber based solution for them.

-- //FC - Round Rock, TX - "Experience is what you get just after you need it"

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