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Air Cannon v3

Step 3Make a Filler Valve Fitting

Make a Filler Valve Fitting
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  • cap_tire_valve.JPG
  • tire_valve_detail.JPG
Using a dremel (or even a regular drill) -- cut a hole in the center of your cap. Chamfering the inner edge will help greatly in getting the stem on.

Tire stems are a press (or pull :P) fit. So make the hole as small as you possibly can. .5" caps are a tight fit, but it fits nontheless.

When you think you're ready -- push the stem through the back of the cap. Then pull it through as hard as you can. Pull one way and then another direction until you notice an edge pop out and set itself on the outside of the cap.
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Author:trebuchet03
I'm an Engineer in San Francisco. Mass producer. Former Intern. Rapid Prototyper. Sometimes, I post Instructables. My Favorite number: 42 By profession - I am an energy engineer. I count electrons p...
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