CONNECTION
Connect a Bosch 35 mm tool port to a 1-1/4 in shop-vac hose
How to join a Bosch 35 mm tool port to a 1-1/4 in shop-vac hose, and what stops it leaking dust.
Reducer required
Not a direct fit. Joining the Bosch 35 mm tool port to a 1-1/4 in shop-vac hose needs a 35 mm to 1-1/4 in step reducer.
END A35 mmBosch 35 mm tool port (1-3/8 in OD, 35 mm OD)
END B31.8 mm1-1/4 in shop-vac hose (approx 1-1/2 cuff in OD, 1-1/4 in ID)
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 | 1-1/4 in shop-vac hose (approx 1-1/2 cuff in OD, 1-1/4 in ID) |
| Fit type | male port into hose cuff |
| Reducer needed | 35 mm to 1-1/4 in step reducer |
Shop notes
Measured across the joint between the Bosch 35 mm tool port and the 1-1/4 in shop-vac hose, the port (35 mm) is 3 mm larger than the hose (32 mm), so it will not seat. A 35 mm to 1-1/4 in step reducer closes that 3 mm step so the two hold together instead of leaking at the gap.
A 3 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 1-1/4 in step reduceraffiliate searchRelated connections
- Bosch 35 mm tool port35 mm OD
- 1-1/4 in shop-vac hose1-1/4 in (approx 32 mm)
- DeWalt DWS779 / DWS780 miter saw port to 1-1/4 in shop-vac hoseneeds a reducer
- DeWalt random-orbit sander stepped port to 1-1/4 in shop-vac hoseneeds a reducer
- 35 mm EU power-tool port (DeWalt / Bosch / Makita) to 1-1/4 in shop-vac hoseneeds a reducer
- 1-1/4 in shop-vac hose to 2-1/2 in shop-vac hoseneeds a reducer
Sources: Bosch power-tool dust extraction accessories, 27 mm and 35 mm connections (catalogue) · Bosch VAC004 2-1/2 in hose to 35 mm dust hose port adapter (product spec) · Shop-Vac 1-1/4 inch Diameter Accessories (product spec) · 35 mm EU power-tool port convention (DeWalt / Bosch / Makita), retailer adapter data