This pump is made from readily available materials and has been shown to achieve a .022 TORR vacuum!!!!
Use extreme caution when working with vacuum
This pump needs a "Roughing" pump to get down to a near vacuum then it will work as described.
No a refrigerator compressor will not work as a "Roughing" Pump for this
No a vacuum cleaner will not work either!
You will need a refrigeration service type pump for the "Roughing" of the vacuum.
Yes you may have to go to IKEA to get some of the parts!
Step 1: Materials
Some 1/4 inch copper tube and
stainless steel flat sections.
I found that the local scrap yard had lots of stainless steel parts. Selecting the right few took a couple of trips.
You will also need to know how to braze. I used stainless brazing rod for joining all parts.
I used a stainless 2.75 od exhaust pipe adapter for the body. Some scrap stainless flats for the ends.
All cutting was done with a Dremel and cut-off abrasive wheel.
Several Ikea stainless cups were sacrificed for this build!
Step 2: Lower end
This was then brazed to the center of the exhaust pipe.
a 1/2 inch hole was drilled into the exhaust pipe for a vacuum port. This was about 1 inch from the bottom edge.