9404 dust collection adapter and shop vac hose guide
Measure to order
Dust port
Round port, friction
Look at the dust port on your Makita 9404. If it sticks out like a tube, measure the outside. On the 9404, if it is a hole, measure the inside. Use calipers.
Published size
Makita lists the vacuum connection as 25 mm in, 31 mm out. (makitauk.com, checked Oct 10, 2026)
Your port can differ. Measure yours and use that number.
Get the adapter for this tool. Printed to order from $11.99, plus $7.95 shipping.
- Made in the USAPrinted to order
- PETGTougher than PLA
- Push onPrinted to your two sizes
- Print defectPhoto within 30 days, reprint or refund
Makita 4 in. Belt Sander
Specifications
Connect your Makita 9404 to your shop vac
Measure the 9404 port and the hose or duct you want on it. We print the adapter between those two numbers. Made in the USA.
Build an adapter for this toolPopular starting points
Full port and fit detail for this tool
The Makita 9404 is a 4 inch belt sander. It hogs off stock fast and levels big surfaces in a hurry. All that fast cutting throws a lot of dust and grit.
The sander has a dust port on the side. We print our adapter to the size you measure there. Our PETG adapter plugs into that port and steps it up to any standard shop vac or dust extractor hose.
Makita 9404 Specs
| Port shape | Round |
|---|---|
| Port location | Side |
| Connection type | Press on |
| Belt width | 4 in. |
Makita 9404 Dust Port: What Connects To It
The 9404 has a dust port on the side of the tool. Our adapter is printed to plug into it.
The 9404 comes with a small dust bag, but a bag fills fast and lets fine dust escape. Most shop vac hoses are 1-7/8 inch or 2-1/2 inch, and a hose taped to this port leaks.
A GulpDust adapter grips the sander port on one end and your vac hose on the other end. Firm push.
How to Connect a Shop Vac to the Makita 9404
Take the dust bag off and clear any dust out of the port first. A clean port gives the best grip.
Push the tool end of the PETG adapter into the port. We print it to the size you measure, so it holds with a firm press. Then press your shop vac or dust extractor hose onto the other end.
Turn the vac on before you start sanding. A belt sander makes dust fast, so a running vac keeps up far better than the small bag.
Why Dust Collection Matters on a Belt Sander
A belt sander removes stock fast. That means a lot of dust in a short time. The stock dust bag cannot hold it all and lets the fine part blow into the air.
Pulling the dust at the port with a vac keeps the bench and the air clean. It also keeps your view of the work clear so you sand flat and even.
For the best result, run a steady vac while you sand. Any shop vac with the right adapter beats the small bag.
Makita 9404 Dust Collection FAQ
What size is the dust port on the Makita 9404?+
Measure it with calipers. It is on the side of the sander. Enter that number in the builder and we print the adapter to it. You pick the hose end you need.
Does the Makita 9404 work with a regular shop vac?+
Yes, with an adapter. A shop vac hose and a tool port rarely match, so measure both. The GulpDust PETG adapter is sized to the sander port on one end and to your vac hose on the other.
Is a shop vac better than the dust bag on the 9404?+
Yes, in most cases. The bag fills fast and lets fine dust escape. A vac pulls steadily and catches more of the dust at the port.
Do I need clamps to attach the adapter?+
Usually not. We print the adapter to the size you measure, so you press it into the port and it holds. The vac hose end works the same way. Add a wrap of tape at any joint that sees heavy use.
Do you sell the design file?+
No. We sell the finished part. Each one is printed to order in PETG and ships from the US.
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