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4'' Metal Blast Gates

Add these heavy-duty Blast Gates to every tool in your shop and increase your dust collection system's efficiency!
Item #
20864
Rating:
86% of 100
(102)

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
Weight 1.0000
Tech Spec
  • OD: 4''
Size 4"
Material Metal
Type Blast Gate
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4.3 / 5.0
103 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
60
26
9
5
3
Metal is better
Spend the extra money over the plastic gates .
March 28, 2020
Purchased
 1 month ago
Woodworking Experience:
Intermediate
Works as expected.
March 21, 2020
Purchased
 1 month ago
Woodworking Experience:
Advanced
Nice quality and works great
March 13, 2020
Purchased
 1 month ago
Nice, sturdy gates. Do not have any mounting method to a wall, but sturdy enough to attach with wooden or metal bracket
March 2, 2020
Purchased
 1 month ago
Metal is far better than plastic and it is worth the price difference. I vote 5 stars.
February 23, 2020
Purchased
 2 months ago
Woodworking Experience:
Advanced
Purchase ONLY These
After each one of my previously purchased plastic blast gate inevitably broke, I replaced them all with the metal version.

Save your time and money and just spend the extra to get the metal blast gates the first time.
February 17, 2020
Purchased
 7 months ago
Woodworking Experience:
Advanced
Good quality and seals well
February 4, 2020
Purchased
 2 months ago
These are solid, reliable, and durable
Don't waste your money on plastic blast gates. These are strong, reliable, and durable.
January 29, 2020
Purchased
 2 months ago
Woodworking Experience:
Advanced
Great
Heavy duty and well built,great product
January 6, 2020
Purchased
 3 months ago
Woodworking Experience:
Intermediate
Just installed them two weeks ago. So far so good. Much better than the plastic ones i used in the past.
January 5, 2020
Purchased
 3 months 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 6 questions Browse 6 questions and 59 answers
Why did you choose this?
Rockler Store
To isolate zones
James Y on Mar 20, 2020
Durability over time
Raoul J on Feb 29, 2020
To isolate zones
James Y on Mar 20, 2020
Expecting them to seal better than my plastic ones.
marlin c on Feb 29, 2020
Durability over time
Raoul J on Feb 29, 2020
I have plastic ones bought from Rockler. They clog and will not close all the way.
Mike G on Feb 15, 2020
Better quality indicated in reviews than plastic ones
Happy customer on Jan 28, 2020
Metal
Diy_creator70 on Jan 14, 2020
Replacing old plastic gates.
Jimmie M on Dec 25, 2019
Relacing my old plastic gate. This should be an upgrade.
Jimmie M on Dec 24, 2019
Good reviews
Bob M on Dec 23, 2019
had others work great
joe s. on Dec 15, 2019
The plastic ones I've been using break too easily and are not sized properly. I've read good reviews on the metal blast gates.
Michael H on Nov 26, 2019
Read better reviews over the plastic variant
Jason L on Nov 11, 2019
there better than the plastic ones
Carla N on Sep 16, 2019
plastic breaks
R O on Sep 2, 2019
The plastic ones don’t have a lock on them, I am constantly fighting to keep them open.
stanley s on Jul 31, 2019
Tired of plastic gates moving and breaking, these should secure the new aluminum blast gates more cleanly and effectively.
Mike F on Jul 27, 2019
plastic set I have keeps breaking
Gary L on Jul 11, 2019
I have some blast gates that a bought locally, they bend very easy. Wanted a more rigid product.
Thomas D on Apr 16, 2019
trouble with plastic blast gates, metal has to be better
Harvey L on Mar 26, 2019
We ordered 4 a short time ago and require 2 more to finish system. Easy to install and like the durability.
Elaine H on Mar 13, 2019
extending vac system
Brenda K on Feb 24, 2019
This seems like it will last longer than the plastic ones.
Brandon W on Feb 21, 2019
Non clogging without an extension on backside of slide.
Elton S on Feb 17, 2019
they work
Greg M on Feb 9, 2019
Purchased to replace current plastic gates that tend to build up sawdust behind the slide gate inhibiting full closure and leakage of the gate.
Randall S on Feb 4, 2019
like metal better then plastic
sylvan fisher Y on Feb 4, 2019
Picked these over the plastic version for the quality and longevity.
Ron C on Jan 20, 2019
This is the first time I shop with Rockler, I selected this blast gate because it is the item I need.
Jesus R on Jan 18, 2019
Bought one before and liked it
Rodney S on Jan 11, 2019
Better than the plastic which easily clog and break
Michael C on Jan 11, 2019
Used this product before; works very well.
Brian H on Jan 4, 2019
I wanted to upgrade my plastic blast gates with something stronger and self clearing.
Zachary V on Dec 28, 2018
work better than the plastic gates.
tlm on Nov 22, 2018
to close off multiple machines on one line
Jesse B on Nov 16, 2018
a friend has them and said they were of excellent quality.
Richard U on Nov 9, 2018
needed for shop supplies
Keith R on Oct 24, 2018
They work well and I need just one more.
MICHAEL E on Oct 21, 2018
Greatly superior to plastic, which lacks durability.
JAMES P on Oct 15, 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
Expecting them to seal better than my plastic ones.
marlin c on Feb 29, 2020
I have plastic ones bought from Rockler. They clog and will not close all the way.
Mike G on Feb 15, 2020
Will these metal gates work with then wall 4" PVC pipe.?
Arlon M on May 19, 2018
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.
Has anyone tried these with 4" 30 ga galvanized HVAC duct? Will they connect?
Tyson H 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.
how do you attach these to the intake ports on a Jet DC 1100VX? What seals the connection of metal to plastic?
William L on Jan 10, 2020
BEST ANSWER: I used electrical tape to seal the connection. Two to three turns around the blast gate port is all it takes. Then I inserted the port into a section of pvc piping and secured with sheet metal screws.
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.
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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