Connect a Bosch 35 mm tool port to a 1-7/8 in shop-vac hose
How to join a Bosch 35 mm tool port to a 1-7/8 in shop-vac hose, and what stops it leaking dust.
Not a direct fit. Joining the Bosch 35 mm tool port to a 1-7/8 in shop-vac hose needs a 35 mm to 1-7/8 in step reducer.
Rings drawn to scale from the measured diameters in the table below.
The two ends
| End A | Bosch 35 mm tool port (1-3/8 in OD, 35 mm OD) |
|---|---|
| End B | 1-7/8 in shop-vac hose (1-7/8 in ID) |
| Fit type | male port into hose cuff |
| Reducer needed | 35 mm to 1-7/8 in step reducer |
Shop notes
Measured across the joint between the Bosch 35 mm tool port and the 1-7/8 in shop-vac hose, the hose (48 mm) is 13 mm larger than the port (35 mm), so the port rattles inside without gripping. A 35 mm to 1-7/8 in step reducer closes that 13 mm step so the two hold together instead of leaking at the gap.
A 13 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
Search Amazon for 35 mm to 1-7/8 in step reduceraffiliate searchRelated connections
- Bosch 35 mm tool port35 mm OD
- 1-7/8 in shop-vac hose1-7/8 in (approx 48 mm)
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