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Picture of Ultra cheap pneumatic ram.

This Instructable will show you how to build a cheap air ram for holiday props, robotics or whatever else you want to do with em! You could just go out and get a screen door closer, but for the price of two and a few extra steps, you can make around 10 of them a foot long ! If needed, you can change the length of the cylinder as well as the diameter of the pipe used. Here I am using 1/2“ pvc. If you want to use larger pipe, you will have to do some trial fitting at the hardware store for a piston and seal. Let’s get to it!

 

Step 1: Materials and Tools

Picture of Materials and Tools
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1/2“ sch 40 pvc pipe

1/2“ end caps (2)

1/4“ steel/aluminum round rod

1/4“ 20 nuts (2)

Air fitting

Plastic bottle cap

5/8 o.d. 5/16 i.d. rubber grommet

5/8x1/4x3/8 nylon spacer

Pvc cement

 

3/8 drill

17/64 drill

1/4 20 die

Drill/drill press

Sand paper or belt sander

 

 
Nice, simple and accurate
oldmicah2 years ago
What do you use to lube the piston?
tobster9103 (author)  oldmicah2 years ago
Silicone spray or grease.