Cutting test tubes

[Junkie]

Does anyone have any good methods for cutting test tubes ? I want to attempt to cast epoxy-graphite pistons in the test
tubes, but how can I cut the glass tube down to a usable size ?

[vile_fly]

This should be helpful.
http://www.machinistblog.com/cutting-gl ... ini-lathe/
other techniques are discussed, too.

[Longboy]

Thats the way I do it on the lathe but use a hand held diamond file to cut thru.

[Bidwell]

Ni-chrome wire wrapped around the tube once with voltage applied, turns red, heats it to breaking. Use a clothes pin to hold the wire tight, insulator where they might touch.

[Ian S C]

Look down the page a bit to Stirling 'first run' by Chriske, there is a photo of a test tube being cut with a Dremmel tool. Ian S C