DCS391B dust collection adapter and shop vac hose guide
Measure to order
Dust port
Look at the dust port on your DeWalt DCS391B. If it sticks out like a tube, measure the outside. On the DCS391B, if it is a hole, measure the inside. Use calipers.
Get the adapter for this tool. Printed to order from $12.99, 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
DeWalt 20V MAX 6-1/2" Circular Saw
Specifications
Connect your DeWalt DCS391B to your shop vac
Measure the DCS391B 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 DeWalt DCS391B is the 20V MAX 6-1/2 inch circular saw. It runs on the 20V MAX battery and cuts boards fast. Like most cordless saws, it throws a lot of sawdust when you cut.
The saw has a dust port on the rear. Measure the port and give us that number. If it is not a plain tube, send us the shape and we will tell you if we can make it.
DeWalt DCS391B Specs
| Port location | Rear |
|---|---|
| Connection type | Press on |
| Blade size | 6-1/2 in. |
| Max speed | 5,150 RPM |
| Weight | 6.5 lbs |
DeWalt DCS391B Dust Port: What Connects To It
The dust port on the DCS391B sits at the rear. Measure the port and give us that number. If it is not a plain tube, send us the shape and we will tell you if we can make it.
Most shop vac hoses are 1-7/8 inch or 2-1/2 inch. Neither one fits an AirLock port on its own. That gap is why dust blows past the hose and into the air.
Measure the port and give us that number. If it is not a plain tube, send us the shape and we will tell you if we can make it.
How to Connect a Shop Vac to the DeWalt 20V MAX 6-1/2 Inch Circular Saw
First, look at the rear port on the saw. Wipe out any sawdust so the adapter seats clean.
If we can make an adapter for this tool, press the tool end onto the port. Then press your shop vac hose onto the other end.
Turn the vac on before you cut. Let it run for a second after each cut so the hose clears. This setup catches most of the dust at the blade instead of on your bench.
Best Vacuum and Dust Extractor Setup for the DeWalt DCS391B
Any shop vac works. A vac with an auto-start outlet is even better, because it turns on when the saw turns on. You do not have to remember to flip a switch.
If you cut a lot, add a cyclone separator between the saw and the vac. The separator drops the heavy chips into a bucket so your vac filter stays clean longer.
Keep the hose short and straight when you can. Long, kinked hoses cut your suction and let dust settle inside.
DeWalt DCS391B Dust Collection FAQ
Will a GulpDust adapter fit the DeWalt DCS391B dust port?+
Maybe. Measure the dust opening on your tool. Send us the shape on the custom request form and we will tell you if we can make it.
Does the DeWalt DCS391B work with a regular shop vac?+
Maybe. A standard shop vac hose rarely fits this port on its own. Send us the shape on the custom request form and we will tell you if we can make an adapter for it.
Do I need clamps or tape to attach the adapter?+
Maybe. Whether it holds depends on the shape. Send us the shape on the custom request form and we will tell you if we can make it.
Will dust collection slow down the saw?+
No. The adapter only routes the dust the saw already makes. It does not touch the blade or the motor. The saw still spins at 5,150 RPM.
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.
Does the same adapter fit other DeWalt 20V MAX tools?+
Not always. Ports can differ between DeWalt 20V MAX tools, so measure the port on yours. The builder prints the adapter to the number you enter.
Related Guides
Drywall Sander With Vacuum Setup: Pole Sander Dust Collection and Hose Connections
Drywall dust is fine, fast, and bad for your lungs. A pole sander, a HEPA shop vac, and a snug hose connection keep more of it out of the air. This guide covers how to pick a setup, how to measure your sander port and hose, and the PETG adapter that joins the two.
9 min read
Concrete Grinder With Vacuum Setup: Dust Collection and Hose Connections
Surface grinding concrete is dirty work. OSHA Table 1 says you need a HEPA vacuum and a shroud. This guide covers hand-held and floor grinders, rental hookups, and how to measure for the PETG adapter that connects your shroud to your shop vac.
8 min read
DeWalt DCV517B vs DCV586B: Which Cordless Vac Should You Get?
DeWalt makes two popular cordless shop vacs. Here is how they compare, and what to measure before you connect your tools.
4 min read
Track Saw Dust Collection: Connect Yours to a Shop Vac or Extractor
Track saws collect dust better than any other circular saw. Port styles change between brands and models, so measure yours. Here is how to connect it.
5 min read
