Connect a Hobby CNC dust boot 2-1/2 in port to a Festool D27 antistatic hose
How to join a Hobby CNC dust boot 2-1/2 in port to a Festool D27 antistatic hose, and what stops it leaking dust.
Not compatible without stepping down. A Festool D27 antistatic hose is far larger than the Hobby CNC dust boot 2-1/2 in port, so it needs a 2-1/2 in to 27 mm step reducer.
Rings drawn to scale from the measured diameters in the table below.
The two ends
| End A | Hobby CNC dust boot 2-1/2 in port (2-1/2 in OD, 64 mm OD) |
|---|---|
| End B | Festool D27 antistatic hose (35 mm tip in OD, 7/8 in ID) |
| Fit type | male port into hose cuff |
| Reducer needed | 2-1/2 in to 27 mm step reducer |
Shop notes
The hose is about 23 mm and the port about 64 mm, a gap of 40 mm, so the port simply swallows the hose with no contact. A 2-1/2 in to 27 mm step reducer is needed, and even reduced the airflow is mismatched between the Hobby CNC dust boot 2-1/2 in port and the Festool D27 antistatic hose.
Wrapping tape to close a 40 mm gap never seals cleanly and chokes the airflow further. Step the sizes properly, or pair each end with a fitting closer to its own size.
The reducer to buy
Shop 2-1/2 in to 27 mm step reducer on AmazonaffiliateFind 2-1/2 in to 27 mm step reducer on eBayaffiliateRelated connections
- Hobby CNC dust boot 2-1/2 in port2-1/2 in OD shop-vac port
- Festool D27 antistatic hose27 mm nominal, tip 23 mm ID / 35 mm OD
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