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Lapidary / Gemstone Community Forum
March 24, 2019, 04:43:37 am
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New screw-closure bangle

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Author Topic: New screw-closure bangle  (Read 573 times)
ileney
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« on: August 27, 2015, 04:27:38 pm »

There is a watermelon tourmaline slice on the screw clasp for this hinged sterling bangle bracelet. This bracelet took FOREVER to make, and had way more steps than it looks like, so I am not sure I will ever make another, but it came out nice IMO and is a present for someone very kind who always helps others. There are different (rolled) patterns on the silver inside vs. out. The inside pattern is ribbed, the outside more of a subtle brushstroke. Forming the bracelet shape was very challenging because of the substantial weight (20 gauge) and added thickness of the border (10 gauge), as was getting the tubing to line up properly without melting or accidentally moving something in the process. I often use 20 gauge but not with this thick a border added on top and am not used to wailing on silver to get it to move!


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Steve
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« Reply #1 on: August 27, 2015, 05:53:35 pm »

SWEET......................... yes
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Steve.............The Silver Fox

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trigon
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« Reply #2 on: August 27, 2015, 07:02:45 pm »

I'm curious. Is there any kind of 'safety' on the screw mechanism, or are you just depending on the fact that it has to be unscrewed for the length of the screw to keep it in place?

I like the bold design.
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ileney
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« Reply #3 on: August 28, 2015, 04:14:29 pm »

Thank you. No, there's no need for a safety as the screw will not turn even a quarter inch without deliberate effort and must make several complete revolutions to clear just the first knuckle. I have no personal knowledge but was told only to use NC tap and dies with silver or other soft metals as the threads will not work as well if you use NF or SAE types. Also, I used very heavy wall tubing and 6 gauge wire to make the screw and catch and measured very carefully to ensure large enough threads and catch.
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hulagrub
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« Reply #4 on: August 30, 2015, 12:33:57 pm »

Very sweet!
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Carol M
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« Reply #5 on: August 30, 2015, 04:53:07 pm »

REALLY LOVELY ILENEY!!! yes

Love the screw clasp!!!

I've never made any hinges or screw clasps, so when you say "I have no personal knowledge but was told only to use NC tap and dies with silver or other soft metals as the threads will not work as well if you use NF or SAE types"

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Ciao,
Carol M
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Isotelus
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« Reply #6 on: August 31, 2015, 08:48:25 am »

NF is National Fine a thread pattern type

SAE is Society of Automotive Engineers early work to design the thread pitched and patterns seen in cars and so many every day common fastners- Nuts and Bolt threads

NC is National Coarse- the most common every day fastener thread.

Hope this helps just a little.
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Bryan
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« Reply #7 on: August 31, 2015, 10:53:35 am »

Ahhhh.
Thanks Bryan,
That makes sense. yes
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Ciao,
Carol M
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ileney
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« Reply #8 on: August 31, 2015, 03:41:34 pm »

Thank you Bryan. I knew NF was finer threads, but that was about it!  I am glad to hear a thorough explanation.

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Ken S.
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« Reply #9 on: September 27, 2015, 12:40:41 pm »

Very nice bangle ileney. dancer5

I'd be tempted to inlay between the channels.  Any thoughts towards that ? Maybe light stones to contrast with the tourmaline.

Again job well done ura

Ken S.
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ileney
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« Reply #10 on: September 29, 2015, 09:19:41 pm »

Very nice bangle ileney. dancer5

I'd be tempted to inlay between the channels.  Any thoughts towards that ? Maybe light stones to contrast with the tourmaline.

Again job well done ura

Ken S.

Many thanks. I like the subtle patterns I rolled on the metal (hard to see in the pics) and it is already so heavy, I don't want to complicate it any more than it is!
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