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Connect a DeWalt random-orbit sander stepped port to a Fein Turbo 35 mm hose

How to join a DeWalt random-orbit sander stepped port to a Fein Turbo 35 mm hose, and what stops it leaking dust.

Direct fit

These connect directly. A Fein Turbo 35 mm hose seats on the DeWalt random-orbit sander stepped port with no reducer.

END A35 mmDeWalt random-orbit sander stepped port (1-3/8 in OD, 35 mm OD)

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

The two ends

End ADeWalt random-orbit sander stepped port (1-3/8 in OD, 35 mm OD)
End BFein Turbo 35 mm hose (1-3/8 in ID)
Fit typemale port into hose cuff
Reducer needednone, direct friction fit

Shop notes

The port measures about 35 mm and the hose about 35 mm, the same, so the port seats inside the hose as a friction fit. No reducer is needed for this pairing, so the DeWalt random-orbit sander stepped port and the Fein Turbo 35 mm hose connect directly.

It is a push fit, not a lock. Seat it fully and check it has not crept loose after a few minutes of vibration before you trust it on fine dust.