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DeWalt DWE7491RS rear dust port: measured 2-1/2 in OD rear port. What shop-vac hose fits it and the exact reducer to join it to a 1-1/4, 2-1/2 or 4 inch hose.

Updated 05 September 2026.

PORT / HOSE

DeWalt DWE7491RS rear dust port dust port size

The measured dimensions of the DeWalt DWE7491RS rear dust port and the hose sizes it mates with.

OD64 mm2-1/2 in, 64 mm

Rings drawn to scale from the measured diameters in the table below.

Measured port dimensions

Port typemale spigot (hose goes over it)
Outer diameter (OD)2-1/2 in, 64 mm
Manufacturer designation2-1/2 in OD rear port
Mating diameter (mm)64

Shop notes

Found on: DeWalt DWE7491RS and DWE7485 jobsite table saws (main rear collection).

The main rear port on the DeWalt jobsite saw is the 2-1/2 in outer-diameter size, so a standard 2-1/2 in shop-vac hose seats over it. The saw also has a smaller 1-1/2 in blade-guard port for the upper collection.

Connect this port

Questions and answers

What is the port type of the DeWalt DWE7491RS rear dust port dust port size?

male spigot (hose goes over it)

What is the outer diameter (od) of the DeWalt DWE7491RS rear dust port dust port size?

2-1/2 in, 64 mm

What is the manufacturer designation of the DeWalt DWE7491RS rear dust port dust port size?

2-1/2 in OD rear port

What is the mating diameter (mm) of the DeWalt DWE7491RS rear dust port dust port size?

64