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$17.99 Each
In stock
Attaches to both wall and gate.
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4'' Metal Blast Gates

Item #
20864
Rating:
86% of 100
76  Reviews
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Heavy-duty construction is longer lasting and less likely to jam than plastic blast gates. Designed to fit inside the 4" clear flexible hose. For more simple, convenient, and stable operation, use our blast gate wall bracket (sold separately). It attaches to both the wall and gate, eliminating the sloppy hose movement that occurs when opening an unanchored blast gate.

(1) 4'' Metal Blast Gate
More Information
Brand No
Manufacturer Part Number No
Weight 1.0000
Tech Spec
  • OD: 4''
Tech Docs No
Size 4"
Material Metal
Type Blast Gate
Prop 65 WarningWARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

Prop 65 WarningWARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood.
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4.3 / 5.0
76 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
42
20
7
5
2
Blast gates
They work great much better than my previous plastic ones that kept popping apart.
July 19, 2018
Purchased
 2 months ago
Woodworking Experience:
Advanced
Overdue
I should have bought these a long time ago. They work excellent and allow dust to be 'pushed' out of the gap on the bottom of where the gate seats. This was my reason for converting from the plastic to metal. The plastic one's track kept getting clogged with dust prevent a complete closure. The metal ones prevent this and work great.
May 14, 2018
Purchased
 5 months ago
Woodworking Experience:
Intermediate
Exceellent quality
Metal blast gates are well worth the cost. Much better functioning than plastic gates and far more durable.
April 8, 2018
Purchased
 6 months ago
Woodworking Experience:
Advanced
work great
slide easy, no clogging, and no appreciable leakage
February 13, 2018
Purchased
 8 months ago
Woodworking Experience:
Advanced
great gate at a good price. Disassembles for cleaning cause you know it's gonna need it someday
February 11, 2018
Purchased
 7 months ago
Woodworking Experience:
Advanced
Works great
This blast gate is well made and does just what it is supposed to do. Makes life much easier in the workshop.
November 9, 2017
Purchased
 11 months ago
Woodworking Experience:
Intermediate
Works great!
I have two of them attached to my Jet dust collector and so far they work great!
September 23, 2017
Purchased
 1 year ago
Woodworking Experience:
Intermediate
Just the right grit
Works perfectly... went on easy and has stayed
September 14, 2017
Purchased
 1 year ago
Woodworking Experience:
Advanced
well made gate
This type is far better if durability is priority than plastic ones.
September 4, 2017
Purchased
 1 year ago
Woodworking Experience:
Advanced
4" Blast gate
Works so much better than the plastic gates. Metal made so much difference. More expensive but will last a long time. Feel it was well worth the extra money.
July 26, 2017
Purchased
 1 year ago
Woodworking Experience:
Intermediate
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Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 5 questions Browse 5 questions and 56 answers
Why did you choose this?
Rockler Store
I needed it
George B on Jun 29, 2018
Metal blast gates are reported to last longer than plastic blast gates.
William A D on May 12, 2018
I needed it
George B on Jun 29, 2018
I have broken two of four plastic blast gates and after trying to glue them back together, with no success, decided it was time to go with metal, replace the broken ones and add two more machines to the system.
Tug L on Jun 10, 2018
Metal blast gates are reported to last longer than plastic blast gates.
William A D on May 12, 2018
I have used the plastic gates before and found that the have a tendency to break at the seams and in the long run this saves money and replacement time.
John A M on Apr 17, 2018
Previously purchased and worked reliably. Expanding shop.
Jennifer H on Mar 31, 2018
The metal blast gates are more reliable and less hassle in the long run.
Steve C on Mar 2, 2018
Reviews
Denise C on Feb 17, 2018
very durable and rugged, replacing the plastic ones
Neva S on Jan 6, 2018
I like metal blast gates
Gary L on Dec 25, 2017
quality construction
David Y on Sep 28, 2017
Heavier duty. I read the plastic ones won't seal after some use and they break.
Aaron T on Sep 24, 2017
Replacing plastic gates that are failing
BILL B on Sep 12, 2017
Great product, had to get another
Adam W on Sep 5, 2017
Dust collection for new edge sander.
Del B on Sep 3, 2017
Just what I needed.
Paul T on Jul 9, 2017
Setting up central vac system in barn
Scott W on Jul 8, 2017
Because the plastic ones I bought earlier all broke
Jim C on Jul 2, 2017
you sold me worthless 4 inch plastic blast gates that you might sell to your enemies not your favored customers. I truly deserve a full refund for the plastic gates. They leak, they break at the drop of a hat, and they rattle
Jay C on May 11, 2017
Never enough
scott k on Apr 30, 2017
More durability than the plastic gates with which I have experienced clogging issues.
Gregory H on Apr 23, 2017
Two collection lines and need to control one. Like aluminum better than plastic
David G on Apr 12, 2017
Blast gate isolates a section of my dust collection off.
James B on Mar 21, 2017
connect to existing dust control system
Chuck on Mar 11, 2017
Last longer than plastic
Kurt B on Feb 25, 2017
Dust control, can't run everything at once.
Terry R on Feb 23, 2017
Wanted to try it with my dust collection system, If works will purchase more
Tim Z on Feb 20, 2017
item was on sale,very good value.
Bruce H on Feb 3, 2017
Dust system
Terry H on Jan 24, 2017
I have the plastic gates and they clog with sawdust as other reviews state.
Larry W on Jan 24, 2017
for use on home built router table
richard d on Jan 24, 2017
durable
martin P on Jan 22, 2017
So I will be able to isolate part of the system I am not using .
Calvin C on Jan 15, 2017
New wood shop
Jay R on Jan 13, 2017
I've been making my dust collection more efficient and healthier for myself. I needed these 4 gates to give me a bakers dozen, plus they were on sale.
K E on Jan 13, 2017
It has better reviews than the plastic gates.
Levi K on Jan 8, 2017
needed it. plastic one broke
Mark C on Jan 7, 2017
I need them.
Dave on Jan 6, 2017
Need it.
JOHN Z on Jan 6, 2017
Needed to replace plastic gates.
John P on Dec 24, 2016
I am needing a gat that will completely shut off. The plastic ones get clogged up from the dust in the slide so it will not close completely
curtis F on Dec 14, 2016
For our dust collection system.
Chuck H on Dec 13, 2016
Improving my Dust Collection system
Jack Y on Nov 25, 2016
Sturdier than plastic. Rockler plastic ones break quite easily.
Wayne T on Nov 24, 2016
DURABILITY
Darrell R on Nov 23, 2016
Too many reviews of plastic blast gates coming apart.
R Robert M on Nov 17, 2016
I've got some plastic and some metal. Over time the plastic ones give out. Replacing my pastic with metal.
Keith P on Oct 27, 2016
Because the plastic one broke
Barry M on Oct 25, 2016
easy to take apart and clean
Dean M on Oct 14, 2016
works better than the plastice gates
J I on Oct 7, 2016
Best quality gate I could find at a reasonable price.
eman on Sep 23, 2016
I have broken two of four plastic blast gates and after trying to glue them back together, with no success, decided it was time to go with metal, replace the broken ones and add two more machines to the system.
Tug L on Jun 10, 2018
I have used the plastic gates before and found that the have a tendency to break at the seams and in the long run this saves money and replacement time.
John A M on Apr 17, 2018
Will these metal gates work with then wall 4" PVC pipe.?
Arlon M on May 19, 2018
Has anyone tried these with 4" 30 ga galvanized HVAC duct? Will they connect?
Tysom on Dec 6, 2015
BEST ANSWER: Solving the same problem now. They fit inside the non-crimped end of the 4" HVAC duct, but there are no screw holes, so I'm in a bit of a pickle since I wanted to use them on vertical sections of duct. Should be fine for horizontal runs.
I can't tell from the pictures: Are there mounting holes that allow mounting these flat on panel instead of a flange? I've got an Incra Router Table Combo (the works!) on the way and I'm running my dust collection for the fence through the dust collection cavity which will contain the router. 4" connection to my DC system, 2-1/2" hose from this cavity to the 2nd collection point on my fence. When router head is away from the fence, I'd like to be able to shut down the fence DC.

Alternatively, what type of metal is it? Easily weldable (So I can mount a couple of strips for mounting flat)?
Steven D on May 13, 2017
4'' Metal Blast Gates
4'' Metal Blast Gates
2-1/2'' Metal Blast Gate
2-1/2'' Metal Blast Gate
BEST ANSWER: There are flanges on both sides of the gates and are designed to be mounted in-line to hard or flex tubing.

They are made of aluminum except for the part that slides which is steel. There are no screw holes but they can be drilled for hard tubing and clamps can be used with flex tubing.
What's the ID and OD of these?
DaveR on Sep 5, 2017
BEST ANSWER: ID doesn't" matter in this case, there would be no way to keep it attached to the gate. OD, again doesn't matter, it will only fit a 4" hose. I found the flanges tobe some what narrow, so a spring type clamp seems to work best rather than the screw type. I also prefer these gates above the plastic ones because they can be used in any position & do not seem to get clogged as much. Hope this helps.
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  2. Available in value-priced four-pack.
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