DeWalt DWS779 12 Inch Miter Saw Dust Port Size and Vacuum Adapter Guide
DeWalt 12 in. Double Bevel Sliding Compound Miter Saw
Specifications
DeWalt DWS779 12 Inch Miter Saw Dust Port Size and Vacuum Adapter Guide
The DeWalt DWS779 is the 12 inch double bevel sliding compound miter saw. It plugs into the wall and makes clean crosscuts and angle cuts. A big saw like this kicks out a lot of dust behind the blade.
The saw has a round dust port on the rear, on the dust bag nozzle. The outer lip is about 41.5 mm across. That figure comes from a printable adapter made for this saw, so treat it as close, not exact. The inside is not confirmed yet, so measure your own port with calipers before you buy. A GulpDust PETG adapter is sized to that port on one end and your shop vac hose on the other end. No tape. No clamps.
DeWalt DWS779 Dust Port and Specs
Port size: please measure to confirm
Source verified, but only one side of the port was confirmed. Measure your port before you buy.
Source we cite: www.printables.com
| Dust port outer diameter | 41.5mm |
| Port shape | Round |
| Port location | Rear |
| Connection type | Friction fit |
| Blade size | 12 in. |
| Max speed | 3,800 RPM |
| Weight | 56.0 lbs |
DeWalt DWS779 Dust Port Size: About 41.5 mm at the Outer Lip, Round
The dust port on the DWS779 is round. The outer lip is about 41.5 mm across. That figure comes from a printable adapter made to fit the saw, so it is close, not a hard spec. The inside size is not confirmed yet.
This port is bigger than the ports on cordless saws and sanders. Most shop vac hoses are 1-7/8 inch or 2-1/2 inch, so they still do not fit this port on their own.
A GulpDust adapter is printed to match the saw port on one end and your vac hose on the other end. Measure your port first so you order the size that seals tight.
How to Measure Your DeWalt DWS779 Dust Port
Pull off the dust bag first so you can see the round port on the rear of the saw. Wipe out any sawdust so your reading is clean.
Close caliper jaws around the OUTSIDE of the port. That gives you the outer diameter in millimeters. Then slide the inside jaws into the port and open them until they touch the inner wall. That gives you the inner diameter. The outer tells you how snug the fit will be.
How to Connect a Shop Vac to the DeWalt 12 Inch Miter Saw
First, pull off the dust bag and look at the rear port. Wipe out any sawdust so the adapter seats clean.
Press the small end of the PETG adapter onto the port. It is a friction fit, so it holds with a firm push. Then press your shop vac hose onto the other end.
Turn the vac on before you cut. A miter saw throws dust straight back, so the vac needs to be running to grab it.
Best Vacuum and Dust Extractor Setup for the DeWalt DWS779
A miter saw makes a lot of chips fast. The dust bag fills up and lets fine dust escape. A shop vac on the port works far better than the bag.
If you cut a lot of trim, 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 DWS779 Dust Collection FAQ
What size is the dust port on the DeWalt DWS779?+
The port is round and about 41.5 mm at the outer lip, verified from a printable adapter made for this saw. The inside is not confirmed yet, so measure your own port before you buy.
Does the DeWalt DWS779 work with a regular shop vac?+
Yes, with the right adapter. A standard shop vac hose does not fit this port on its own. The GulpDust PETG adapter fits the saw port on one end and your vac hose on the other. Measure your port first so the fit is tight.
Do I need clamps or tape to attach the adapter?+
No. The adapter is a friction fit. You push it into the port and it holds. The same goes for the vac hose end.
Is a shop vac better than the dust bag?+
Yes. The bag fills up fast and lets fine dust slip out. A shop vac on the port pulls more dust and keeps the air cleaner.
Can I print this adapter myself?+
Yes. You can buy the printed PETG part shipped from the US, or download the STL file and print it at home. We suggest PETG with 3 walls and 25 percent infill.
Does the same adapter fit other DeWalt miter saws?+
Sometimes. The DWS780 and the DWS713 have ports close to this one in size, but each saw is a bit different and the DWS780 port is tapered. Check each tool page and measure before you buy.
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