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Connect a Makita 24 mm tool cuff to a 1-7/8 in shop-vac hose

How to join a Makita 24 mm tool cuff to a 1-7/8 in shop-vac hose, and what stops it leaking dust.

Reducer required

Not a direct fit. Joining the Makita 24 mm tool cuff to a 1-7/8 in shop-vac hose needs a 24 mm to 1-7/8 in step reducer.

END B47.6 mm1-7/8 in shop-vac hose (1-7/8 in ID)
END A24 mmMakita 24 mm tool cuff (15/16 in OD, 24 mm OD)

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

The two ends

End AMakita 24 mm tool cuff (15/16 in OD, 24 mm OD)
End B1-7/8 in shop-vac hose (1-7/8 in ID)
Fit typemale port into hose cuff
Reducer needed24 mm to 1-7/8 in step reducer

Shop notes

Measured across the joint between the Makita 24 mm tool cuff and the 1-7/8 in shop-vac hose, the hose (48 mm) is 24 mm larger than the port (24 mm), so the port rattles inside without gripping. A 24 mm to 1-7/8 in step reducer closes that 24 mm step so the two hold together instead of leaking at the gap.

A 24 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.