About this project
Make a vacuum attachment that fits your hose. Pick the hose size and how it attaches, choose a tip, and print it as one piece standing on the hose end, with no supports.
The nozzle is a single shell: a round hose connector, a smooth transition, and a straight tip. The airway is the same shape offset inward by the wall thickness, open at both ends.
Hose connection
- Hose sizes: 1", 1¼", 1½", 2", 2½", 3", 4" and 4½", plus 32, 35, 38, 40, 50, 60 and 100 mm. Choose Custom to type any diameter from 15 to 150 mm.
- Inside the hose (plug): a tapered plug with a stop collar. Use the hose's inner diameter.
- Over the hose (socket): a tapered socket with a stop lip inside. Use the hose's outer diameter.
- Friction taper: the fit diameter runs a little under to a little over the chosen size along the connector, so one print grips hoses that are slightly off nominal. The default taper (1.5 mm) covers 33.5–36.5 mm on a 35 mm hose.
- Connector length and stop height set how far the hose goes on and how big the collar or lip is.
Tips
| Preset | Outer size | Default length | Notes |
|---|---|---|---|
| Slot | 40 × 7 mm | 40 mm | General-purpose flat slot |
| Wide floor | 140 × 10 mm | 25 mm | End bevelled 20° to sit on the floor |
| Crevice | 20 × 8 mm | 120 mm | End slanted 45° for gaps and corners |
| Round tube | Ø14 mm | 100 mm | Small round extension |
| Off-side flat | 70 × 15 mm | 40 mm | Tip offset so one face is flush with the connector side |
| Large rectangle | 70 × 50 mm | 30 mm | Big opening for loose debris |
| Long rectangle | 40 × 20 mm | 80 mm | Long reach with a larger airway |
| Custom | any | 50 mm | Width, height, corner radius, end-cut angle and direction, side offset |
These settings work with any tip:
- Tip length: overrides the preset length.
- Bend: angles the tip from the hose axis, from 0 to 90°.
- Transition length: sets the round-to-tip blend. It lengthens itself so the walls stay within 40° of vertical.
Printing
- Print it standing on the hose end, as modelled. The plug end has a lead-in chamfer and the socket has a bed chamfer, so the first layer starts cleanly.
- With the transition kept within 40° of vertical, the nozzle prints without supports up to about a 45° bend. Sharper bends overhang and thin the wall on the inside of the bend.
- The wall is 2 mm by default and adjustable from 1.2 to 4 mm. Go thicker for big hoses or heavy use.
UpdatedOct 24, 2026
Version23
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