Sight glass for fuel tanks etc

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Io ho usato questo sistema, il tubo di vetro sul tornio con gomma nelle griffe
Poi col drimmel e lama al diamante con acqua, il tornio gira piano e il drimmel velocemente, sono riuscito a fare un cilindro di vetro con foro di scarico
 

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Lab glassware comes in all shapes and sizes, and doesn't cost much. All my sight glasses and oil reservoirs are made from cut down pyrex test tubes. they come in many sizes. My set up is as per the photo- dremel drill in the toolpost; the lathe rotates at a low reverse speed, with the bed covered. I use a diamond disc to cut, and then heat the finished piece to melt the sharp edges with a blowtorch.

As an interesting aside, chemists refer to the heating process as annealing!

-Andrew UK
 
Slightly off topic, but has anyone posted use of common household sink downers for tank main bodies? Nice thinwall brass 1.5" dia., various lengths, cheap and available. Nowadays unfortunately many of these are chrome plated.

Hi Canfly, yep i used the down pipe for my tank in the upshur engine. it was chrome coated brass. cost me about 7.00 US if i remember right. probably could have gotten 2 tanks out of it. it worked great. just used some emory cloth to sand the chrome coat off of the brass and everything soldered up just fine
 
I sandwich a few pieces of Polycarbonate between a couple pieces of plywood and pinch in lathe with tail stock and turn them to dia that I need.
 

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