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

Not a direct fit. Joining the Mirka DEROS sander port to a DeWalt DWV012 32 mm hose needs a 27 mm to 32 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 Mirka DEROS sander port to a DeWalt DWV012 32 mm hose

How to join a Mirka DEROS sander port to a DeWalt DWV012 32 mm hose, and what stops it leaking dust.

Reducer required

Not a direct fit. Joining the Mirka DEROS sander port to a DeWalt DWV012 32 mm hose needs a 27 mm to 32 mm step reducer.

END B32 mmDeWalt DWV012 32 mm hose (1-1/4 in ID)
END A27 mmMirka DEROS sander port (1-1/16 in OD, 27 mm OD)

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

The two ends

End AMirka DEROS sander port (1-1/16 in OD, 27 mm OD)
End BDeWalt DWV012 32 mm hose (1-1/4 in ID)
Fit typemale port into hose cuff
Reducer needed27 mm to 32 mm step reducer

Shop notes

Measured across the joint between the Mirka DEROS sander port and the DeWalt DWV012 32 mm hose, the hose (32 mm) is 5 mm larger than the port (27 mm), so the port rattles inside without gripping. A 27 mm to 32 mm step reducer closes that 5 mm step so the two hold together instead of leaking at the gap.

A 5 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 27 mm to 32 mm step reducer on AmazonaffiliateFind 27 mm to 32 mm step reducer on eBayaffiliate

Related connections

Questions and answers

Connect a Mirka DEROS sander port to a DeWalt DWV012 32 mm hose?

Not a direct fit. Joining the Mirka DEROS sander port to a DeWalt DWV012 32 mm hose needs a 27 mm to 32 mm step reducer.