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2014-10-04, 6:56pm
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Bernhard Riegler
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Join Date: Jun 03, 2010
Location: Northland - New Zealand
Posts: 452
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mixing metal with glass
I would like to make some doorknobs and for this I would need to embed a metal fitting with a thread. Is it possible and are there any tricks to do this? I have tried it before, but sadly it cracked. Is any special metal better/easier than others? Any feedback is greatly appreciated - best regards - Bernhard 
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Bernhard Riegler - Bay of Islands - New Zealand
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2014-10-04, 8:14pm
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Senior Member
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Join Date: Jun 14, 2005
Location: The Rocky Coast State!
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Sue Walsh
The past is history,
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and the present is a gift.
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2014-10-04, 8:32pm
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Bernhard Riegler
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Join Date: Jun 03, 2010
Location: Northland - New Zealand
Posts: 452
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Just to show, what I would like to implant into the glass orb. Is that possible?
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Bernhard Riegler - Bay of Islands - New Zealand
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2014-10-05, 4:59am
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DaveK
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Join Date: Jul 03, 2013
Location: Eugene, Oregon
Posts: 301
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I tried to encase a brass screw in a marble, just for grins, the heat required to shape the marble deformed the brass screw quit a bit. I would think you would have better luck with stainless steel. The old style of doorknob, with the 1/4 inch square shaft would probably work better.
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2014-10-05, 3:20pm
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Borovangelist
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Join Date: Jan 26, 2007
Location: Auburn, MA
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These have the glass glued into the metal back piece.
https://www.etsy.com/listing/1533541..._home_active_3
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2014-10-05, 3:55pm
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Join Date: Jun 23, 2005
Location: Up and down I-95
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LOL! Keep an eye on your stuff. Good one Tom.
I haven't made anything as big as a doorknob, but for cabinet knobs I'll either make them on a mandrel and epoxy an insert, or make a cabochon and epoxy that. Depends on the hardware. I just don't trust metal to glass...heard some sad stories.
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Rebecca
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2014-10-05, 5:35pm
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Bernhard Riegler
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Join Date: Jun 03, 2010
Location: Northland - New Zealand
Posts: 452
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well, it didn't work for me - cracked - and I don't even want to do the big ones, only for cupboards. So the threaded piece would be for a 4-6mm thread - no more. Every time I mix glass with metal it cracks. Maybe glue is the only way? Thank you for your comments
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Bernhard Riegler - Bay of Islands - New Zealand
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2014-10-05, 6:04pm
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Senior Member
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Join Date: Jun 23, 2005
Location: Up and down I-95
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Bernhard, maybe something like this if you're using marbles? I buy from here but I don't know if they ship to NZ.
http://www.dlawlesshardware.com/knobbase.html
Personally, I think epoxy is the way to go. I know some people have used the inserts in glass with no problems with soft glass, but that's the kind of crap that keeps me up at night. lol
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Rebecca
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2014-10-05, 7:04pm
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DaveK
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Join Date: Jul 03, 2013
Location: Eugene, Oregon
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Quote:
Originally Posted by Onekura
I would like to make some doorknobs...
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Oookay then.
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2014-10-05, 8:52pm
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Borovangelist
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Location: Auburn, MA
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Epoxy is pretty much the best and easiest way. If you're really that concerned about the aesthetics of it, put a circle of felt on the back. Any spillage can typically be scraped off with a utility blade.
One other option you can consider: Years ago someone had posted on here that they were making knobs with the hole clean through them. You could put a long screw all the way through from the front and then use a nut on the end of the screw inside the drawer/cabinet. It was essentially a large shaped bead.
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