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Topic: How to I reduce the diameter of a disc-shaped piece of glass?  (Read 536 times)
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« on: February 19, 2011 06:43:34 AM »

Maybe you could point me in the right direction.  I have a thin, disc-shaped piece of glass from a watch face.  I want to use it for a project, but it's a few millimeters too wide to use, so I want to reduce the diameter by grinding it.  However it also needs to be perfectly round to fit into it's setting.  How would I do this?  I was thinking I could attach the disc to the end of a rotary tool attachment somehow, so that I could spin the disc at high speed against some sand paper, reducing the diameter.  Do you think that'll work? Thanks for the tips!
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« Reply #1 on: February 19, 2011 05:57:28 PM »

Maybe you could point me in the right direction.  I have a thin, disc-shaped piece of glass from a watch face.  I want to use it for a project, but it's a few millimeters too wide to use, so I want to reduce the diameter by grinding it.  However it also needs to be perfectly round to fit into it's setting.  How would I do this?  I was thinking I could attach the disc to the end of a rotary tool attachment somehow, so that I could spin the disc at high speed against some sand paper, reducing the diameter.  Do you think that'll work? Thanks for the tips!

Normally watch bezels are very hard glass. They make them that way so they do not easily break when wearing the watch.

Therefore the way you mentioned most likely will not work. The best way would be to use a glass grinder. Perhaps to do that go to someone who does glass work or stained glass in your area, and ask them if they would mind grinding the piece for you.
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