3D Printed Air Knife Compressed Air Diffuser

Design preview. Rendered from the file, not a photo.
This model is not currently offered as a verified ready to buy print.
What it does
- Shoots a wide flat band of air so you can cool your workpiece faster and more evenly.
- Fits standard modular coolant and air pipes in your shop, so setup takes just minutes.
- Runs much quieter than regular nozzles, so your workshop stays calmer while you work.
- Works with compressed air or coolant, so one tool handles multiple jobs.
- Clamps securely to your existing system, so it stays put during heavy use.
Imagine a single tool that cools your CNC work better and keeps your shop quieter. This air knife does both. It shoots a wide, flat band of compressed air across your workpiece, spreading the cooling power evenly where you need it most.
The design clams around the coolant and air pipes already in your shop. No weird adapters. No waiting around. It works with compressed air alone or mixed with coolant. Unlike standard pointed nozzles, this flat blade design cuts noise by a lot, so you hear yourself think while the machine runs. Your hands and ears will thank you.
5.9k downloads in the maker community. That is interest in the design on the site it came from, not our sales.
What you get
- This design prints as one piece.
- Nothing else to print or buy for this to work.
What it is made of
Designs like this print well in PETG. Compare the materials.
Printed plastic is strong for its size, but it is not metal. We have not load tested this design, so we do not publish a weight rating. Keep it out of a hot car and away from open flame.
More like this

Precision Measuring Tool Set - 3D Printed Workshop Tools
Design library

Resistor Lead Forming Tool, 3D Printed Workshop Helper
Design library

Center Finder Tool for Wood, Mark Perfect Midpoints Every Time
Design library

Hot Glue Gun Stand for Small Glue Guns, Compatible with Prusa
Design library

Drilling Jig with Integrated Dust Collector
Design library

Support for Dremel 4000, 3D Printed Workshop Tool
Design library

Cross Tweezer for Soldering, Normal Spring Tension
Design library

Bit Organizer for Dremel Rotary Tool Bits and Discs
Design library
Who made this design
Designed by NeverDun. We did not draw it.
Shared under Creative Commons, credit and share alike. See the original design