Connect a Festool KAPEX KS 120 miter saw port to a 2-1/2 in shop-vac hose
How to join a Festool KAPEX KS 120 miter saw port to a 2-1/2 in shop-vac hose, and what stops it leaking dust.
Not a direct fit. Joining the Festool KAPEX KS 120 miter saw port to a 2-1/2 in shop-vac hose needs a 27 mm to 2-1/2 in step reducer.
Rings drawn to scale from the measured diameters in the table below.
The two ends
| End A | Festool KAPEX KS 120 miter saw port (1-7/16 in OD, 36 mm OD) |
|---|---|
| End B | 2-1/2 in shop-vac hose (2-1/4 in OD, 2-1/4 in ID) |
| Fit type | male port into hose cuff |
| Reducer needed | 27 mm to 2-1/2 in step reducer |
Shop notes
Measured across the joint between the Festool KAPEX KS 120 miter saw port and the 2-1/2 in shop-vac hose, the hose (57 mm) is 21 mm larger than the port (36 mm), so the port rattles inside without gripping. A 27 mm to 2-1/2 in step reducer closes that 21 mm step so the two hold together instead of leaking at the gap.
A 21 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 2-1/2 in step reducer on AmazonaffiliateFind 27 mm to 2-1/2 in step reducer on eBayaffiliateRelated connections
- Festool KAPEX KS 120 miter saw port27 mm and 36 mm dust ports
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