How to make an hourglass from two lightbulbs

Step 2 The tools

Tools you may need:

- A saw
- A pin
- A hammer
- A screwdriver
- Some sandpaper
- A pair of scisssors
- a diamond tool for rototool , one of those use for cutting glass and ceramics.

Comments

[Caodiie]

Is there anything else we can use instead of the diamond tool? Because I don't have it at home and I doubt my school has it... I'm making it for a school project.
Thank you a lot for posting this tutorial, totally awesome. :D

[XLY]

The diamond disc is the best option and you can buy really cheap on ebay. As a substitute you may try a metal saw holding the glass bulb with a rag and try not to hold it to tight. the saw should move really close to the place where the glass is melt. Light bulbs are made by joining two parts of glass one the has the bell shape and the second which holds the filament. I don´t recommend you to use a hot wire technique since it is really esay to have a crack during the procedure.
Maybe, and only maybe, after marking with the metal saw all the circumference where you want to have the cut , you can try to heat up that contour with an alcohol flame and let it cool down at room temperature. Some time that makes a quasi perfect crack, but I moved to the diamond disc because of the better results. Good luck¡¡¡

[Caodiie]

Alright, I'll see what my school have and I'll try your tips! :)
Thanks a lot!