DeWalt DWS780 Miter Saw Dust Port Size and Vacuum Adapter Guide
DeWalt 12 in. Double Bevel Sliding Compound Miter Saw (XPS)
Specifications
DeWalt DWS780 Miter Saw Dust Port Size and Vacuum Adapter Guide
The DeWalt DWS780 is a 12 inch double bevel sliding compound miter saw. The XPS light shows a shadow line so you cut right where you want. A saw this size throws a lot of chips and fine dust with every cut.
The saw has a tapered dust port on the rear. It is not a straight round port, it gets wider toward the lip. The lip is about 41.5 mm across. That figure comes from an 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 shaped to that taper on one end and your shop vac hose on the other end. No tape. No clamps.
DeWalt DWS780 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: toolcurve.com
| Dust port outer diameter | 41.5mm |
| Port shape | Tapered |
| Port location | Rear |
| Connection type | Friction fit |
| Blade size | 12 in. |
| Max speed | 3,800 RPM |
| Weight | 56.0 lbs |
DeWalt DWS780 Dust Port Size: Tapered, About 41.5 mm at the Lip
The dust port on the DWS780 is tapered, not straight. It gets wider toward the lip, and the lip is about 41.5 mm across. That figure comes from an adapter made to fit the saw, so it is close, not a hard spec. The inside size is not confirmed yet.
Most shop vac hoses are 1-7/8 inch or 2-1/2 inch. They do not fit this port on their own. The dust bag that comes with the saw catches very little, so most chips end up on the floor.
A GulpDust adapter is printed to match the saw taper 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 DWS780 Dust Port
Pull the dust bag off first so you can see the tapered port on the rear of the saw. Wipe out any sawdust so your reading is clean.
The port is tapered, so close caliper jaws around the OUTSIDE at the wide lip, then again near the base. Write down both numbers. Then take the inner reading at the lip. The taper is what lets a shaped adapter grip without clamps.
How to Connect a Shop Vac to the DeWalt DWS780 Miter Saw
First, pull the dust bag off and look at the tapered port on the rear of the saw. Wipe out any sawdust so the adapter seats clean.
Press the small end of the PETG adapter onto the tapered port. It is a friction fit, so it grips on the slope with a firm push. Then press your shop vac hose onto the other end.
Turn the vac on before you cut. A miter saw makes big chips fast, so a strong vac keeps the bench and floor clear.
Best Vacuum and Cyclone Setup for the DeWalt DWS780
A miter saw this size throws a high volume of chips. A plain shop vac fills up fast and the filter clogs.
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 and your suction stays strong.
Keep the hose short and straight when you can. Long, kinked hoses cut your suction and let dust settle inside.
DeWalt DWS780 Dust Collection FAQ
What size is the dust port on the DeWalt DWS780?+
The port is tapered, not straight round. The lip is about 41.5 mm across, verified from an adapter made for this saw. The inside is not confirmed yet, so measure your own port before you buy.
Does the DeWalt DWS780 work with a regular shop vac?+
Yes, with the right adapter. A standard shop vac hose does not match this tapered port. 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 the small dust bag enough on the DWS780?+
No. The bag catches very little. A shop vac on the port catches far more of the chips and fine dust, which keeps your shop and lungs 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 DeWalt DWS779 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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