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Connect a Makita LS1019L miter saw port to a Festool D50 antistatic hose

How to join a Makita LS1019L miter saw port to a Festool D50 antistatic hose, and what stops it leaking dust.

Reducer required

Not a direct fit. Joining the Makita LS1019L miter saw port to a Festool D50 antistatic hose needs a 1-3/8 in to 50 mm step reducer.

END B49.2 mmFestool D50 antistatic hose (1-15/16 in ID)
END A34.9 mmMakita LS1019L miter saw port (1-3/8 in ID)

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

The two ends

End AMakita LS1019L miter saw port (1-3/8 in ID)
End BFestool D50 antistatic hose (1-15/16 in ID)
Fit typehose cuff into female socket
Reducer needed1-3/8 in to 50 mm step reducer

Shop notes

Measured across the joint between the Makita LS1019L miter saw port and the Festool D50 antistatic hose, the hose tip (50 mm) is 15 mm larger than the port socket (35 mm), so it will not seat. A 1-3/8 in to 50 mm step reducer closes that 15 mm step so the two hold together instead of leaking at the gap.

A 15 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.