CONNECTION
Connect a Bosch 27 mm tool port to a Makita 38 mm hose
How to join a Bosch 27 mm tool port to a Makita 38 mm hose, and what stops it leaking dust.
Reducer required
Not a direct fit. Joining the Bosch 27 mm tool port to a Makita 38 mm hose needs a 27 mm to 38 mm step reducer.
END B38 mmMakita 38 mm hose (1-1/2 in ID)
END A27 mmBosch 27 mm tool 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 A | Bosch 27 mm tool port (1-1/16 in OD, 27 mm OD) |
|---|---|
| End B | Makita 38 mm hose (1-1/2 in ID) |
| Fit type | male port into hose cuff |
| Reducer needed | 27 mm to 38 mm step reducer |
Shop notes
Measured across the joint between the Bosch 27 mm tool port and the Makita 38 mm hose, the hose (38 mm) is 11 mm larger than the port (27 mm), so the port rattles inside without gripping. A 27 mm to 38 mm step reducer closes that 11 mm step so the two hold together instead of leaking at the gap.
A 11 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 38 mm step reducer on AmazonaffiliateFind 27 mm to 38 mm step reducer on eBayaffiliateRelated connections
- Bosch 27 mm tool port27 mm OD
- Makita 38 mm hose38 mm (1-1/2 in)
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