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#11
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gluing organics to metal
On Wed, 16 Aug 2006 20:11:57 -0700, in rec.crafts.jewelry "Andrew Werby"
wrote: "Abrasha" wrote And what exactly do you mean with "mechanical mount"? How would you mount a pearl "mechanically" to a sterling silver post? Would you elaborate a bit please. -- Abrasha http://www.abrasha.com [I'm surprised you don't know how to do this. Split the post and insert a small wedge of silver. Push the pearl onto it, driving the wedge into the split and expanding it in the hole. This results in a "mechanical" connection that was often used before the advent of modern glues. Of course, a little epoxy helps too...] Andrew Werby www.unitedartworks.com And for those unfamilier with this currently seldom done method (though it's still useful every now and then), the easiest way to split the post is not to. instead, make it from a folded over piece of half round wire. Then all you need do is prevent the solder from flowing up into the split when you solder on the post, which is done simply by spreading the "wings" of the post while soldering. Close it up again before fitting the wedge and pearl. The pearl or bead or whatever part needs to be precisly fitted to the post and wedge, regarding the depth of the drill hole, so the wedge does get pushed into the post spreading it. This takes care, since if the wedge is too small or the hole too deep, the fit isn't so tight, and if the hole not quite deep enough or the wedge too big, the assembly jams tight before the pearl is fully pressed down. And once you assemble this, it cannot be taken apart again, so you don't get to trial fit it (at least not with the wedge in place...) And it holds best if you use a drill or bur to spread out the interior bottom end of the hole (undercut the hole on the inside), so the peg has something to spread into (the hole is wider inside than at the outside of the pearl). That way, once fitted, it cannot pull out. Commonly, even in the old days, some sort of cement was also used, if only to keep the pearl from being able to spin or wiggle a bit on the end of the post. Even in the (very) old days, glues sufficient for this task were available. All in all, though, this is fussy enough to do that I for one am quite grateful for modern glues. They hold when you want em to, and can be disassembled too, if you need to do so. cheers Peter |
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#12
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gluing organics to metal
Peter W.. Rowe, wrote:
On Wed, 16 Aug 2006 20:11:57 -0700, in rec.crafts.jewelry "Andrew Werby" wrote: "Abrasha" wrote And what exactly do you mean with "mechanical mount"? How would you mount a pearl "mechanically" to a sterling silver post? Would you elaborate a bit please. -- Abrasha http://www.abrasha.com [I'm surprised you don't know how to do this. Split the post and insert a small wedge of silver. Push the pearl onto it, driving the wedge into the split and expanding it in the hole. This results in a "mechanical" connection that was often used before the advent of modern glues. Of course, a little epoxy helps too...] Andrew Werby www.unitedartworks.com And for those unfamilier with this currently seldom done method (though it's still useful every now and then), the easiest way to split the post is not to. instead, make it from a folded over piece of half round wire. Then all you need do is prevent the solder from flowing up into the split when you solder on the post, which is done simply by spreading the "wings" of the post while soldering. Close it up again before fitting the wedge and pearl. The pearl or bead or whatever part needs to be precisly fitted to the post and wedge, regarding the depth of the drill hole, so the wedge does get pushed into the post spreading it. This takes care, since if the wedge is too small or the hole too deep, the fit isn't so tight, and if the hole not quite deep enough or the wedge too big, the assembly jams tight before the pearl is fully pressed down. And once you assemble this, it cannot be taken apart again, so you don't get to trial fit it (at least not with the wedge in place...) And it holds best if you use a drill or bur to spread out the interior bottom end of the hole (undercut the hole on the inside), so the peg has something to spread into (the hole is wider inside than at the outside of the pearl). That way, once fitted, it cannot pull out. Commonly, even in the old days, some sort of cement was also used, if only to keep the pearl from being able to spin or wiggle a bit on the end of the post. Even in the (very) old days, glues sufficient for this task were available. All in all, though, this is fussy enough to do that I for one am quite grateful for modern glues. They hold when you want em to, and can be disassembled too, if you need to do so. cheers Peter Is this called a 'trunnel' as in timber framing/ship building? Carl -- to reply, change ( .not) to ( .net) |
#13
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gluing organics to metal
On Wed, 16 Aug 2006 21:15:44 -0700, in rec.crafts.jewelry Carl 1 Lucky Texan
wrote: Is this called a 'trunnel' as in timber framing/ship building? Carl Sounds good to me, though I've never heard that term before. Don't happen to know a better one, so if you like, go with it! :-) |
#14
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gluing organics to metal
Carl 1 Lucky Texan wrote:
Is this called a 'trunnel' as in timber framing/ship building? No, a trunnel or 'tree-nail' is a wooden peg. The mechanism of a slotted tenon or peg with a wedge going into a blind hole is known as fox wedging. http://onlinedictionary.datasegment.com/word/fox+wedge (about 2/3 of the way down) - Carl (the other one) |
#15
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gluing organics to metal
Andrew Werby wrote:
"Abrasha" wrote And what exactly do you mean with "mechanical mount"? How would you mount a pearl "mechanically" to a sterling silver post? Would you elaborate a bit please. -- Abrasha http://www.abrasha.com [I'm surprised you don't know how to do this. Split the post and insert a small wedge of silver. I did know this, and I am fairly confident, that mbstevens did not. :-) -- Abrasha http://www.abrasha.com |
#16
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gluing organics to metal
On Sat, 26 Aug 2006 22:52:07 +0000, Abrasha wrote:
[I'm surprised you don't know how to do this. Split the post and insert a small wedge of silver. I did know this, and I am fairly confident, that mbstevens did not. :-) This is an _obvious_ bit of Abrashive trolling, but I notice it has a little smiley on it, so I'll ask first, just to save Peter some trouble: Do you --really-- want me to bite back, Abrasha? :~) |
#17
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gluing organics to metal
On Thu, 17 Aug 2006 04:17:18 GMT, "Peter W.. Rowe,"
wrote: On Wed, 16 Aug 2006 21:15:44 -0700, in rec.crafts.jewelry Carl 1 Lucky Texan wrote: Is this called a 'trunnel' as in timber framing/ship building? No. A trunnel depends on the wood getting wet and swelling. The split tenon technique is used in woodworking, though. Both in a blind mortise, as described here, and in a through mortise, where you can drive the wedge in from the other end. In that case, it's usually a wood of a contrasting color, for decorative purposes. Carl Sounds good to me, though I've never heard that term before. Don't happen to know a better one, so if you like, go with it! :-) -- Al Balmer Sun City, AZ |
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