Connect a Benchtop jointer 2-1/4 in port to a 1-7/8 in shop-vac hose
How to join a Benchtop jointer 2-1/4 in port to a 1-7/8 in shop-vac hose, and what stops it leaking dust.
Not a direct fit. Joining the Benchtop jointer 2-1/4 in port to a 1-7/8 in shop-vac hose needs a 2-1/4 in to 1-7/8 in step reducer.
Rings drawn to scale from the measured diameters in the table below.
The two ends
| End A | Benchtop jointer 2-1/4 in port (2-1/4 in OD, 57 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 | 2-1/4 in to 1-7/8 in step reducer |
Shop notes
Measured across the joint between the Benchtop jointer 2-1/4 in port and the 1-7/8 in shop-vac hose, the port (57 mm) is 9 mm larger than the hose (48 mm), so it will not seat. A 2-1/4 in to 1-7/8 in step reducer closes that 9 mm step so the two hold together instead of leaking at the gap.
A 9 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 2-1/4 in to 1-7/8 in step reduceraffiliate searchRelated connections
- Benchtop jointer 2-1/4 in port2-1/4 in OD (approx 57 mm)
- 1-7/8 in shop-vac hose1-7/8 in (approx 48 mm)
- 1-7/8 in shop-vac hose to 2-1/2 in shop-vac hoseneeds a reducer
- DeWalt DWS779 / DWS780 miter saw port to 1-7/8 in shop-vac hoseneeds a reducer
- DeWalt miter saw dust elbow (1-1/2 in outer) to 1-7/8 in shop-vac hoseneeds a reducer
- DeWalt random-orbit sander stepped port to 1-7/8 in shop-vac hoseneeds a reducer