PortMatchMatch any tool dust port to any shop-vac or collector hose, with the exact reducer

Not a direct fit. Joining the DeWalt DWS779 / DWS780 miter saw port to a Makita 38 mm hose needs a 1-5/8 in to 38 mm step reducer. Measured OD and ID of each end, the real-world trap, and the exact reducer to buy.

Updated 05 September 2026.

CONNECTION

Connect a DeWalt DWS779 / DWS780 miter saw port to a Makita 38 mm hose

How to join a DeWalt DWS779 / DWS780 miter saw port to a Makita 38 mm hose, and what stops it leaking dust.

Reducer required

Not a direct fit. Joining the DeWalt DWS779 / DWS780 miter saw port to a Makita 38 mm hose needs a 1-5/8 in to 38 mm step reducer.

END A41 mmDeWalt DWS779 / DWS780 miter saw port (1-5/8 in OD, 41 mm OD)
END B38 mmMakita 38 mm hose (1-1/2 in ID)

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

The two ends

End ADeWalt DWS779 / DWS780 miter saw port (1-5/8 in OD, 41 mm OD)
End BMakita 38 mm hose (1-1/2 in ID)
Fit typemale port into hose cuff
Reducer needed1-5/8 in to 38 mm step reducer

Shop notes

Measured across the joint between the DeWalt DWS779 / DWS780 miter saw port and the Makita 38 mm hose, the port (41 mm) is 3 mm larger than the hose (38 mm), so it will not seat. A 1-5/8 in to 38 mm step reducer closes that 3 mm step so the two hold together instead of leaking at the gap.

A 3 mm mismatch feels close enough to force, and it will hold for a minute before it works loose under airflow. Fit the step ring rather than trusting friction on a gap this size.

The reducer to buy

Shop 1-5/8 in to 38 mm step reducer on AmazonaffiliateFind 1-5/8 in to 38 mm step reducer on eBayaffiliate

Related connections

Questions and answers

Connect a DeWalt DWS779 / DWS780 miter saw port to a Makita 38 mm hose?

Not a direct fit. Joining the DeWalt DWS779 / DWS780 miter saw port to a Makita 38 mm hose needs a 1-5/8 in to 38 mm step reducer.