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Tips, Techniques, and Questions -- Technical questions or tips |
2012-12-04, 8:49pm
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coring
I am measurement challenged. I would like to order some tubing to try coring.
I would like to get copper and aluminum. I have 1/4 mandrels and I believe 5/32. Is that the size tubing I need to look for?
Thank you all in advance.
Cherri
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2012-12-05, 2:38am
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It depends what the beads are intended for. If you need them to fit charm bracelets, it's important to know what inner diameter will work with them.
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Anne
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2012-12-05, 9:08pm
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I tried them (I think beads made with 5/32) on the bracelets that my friend has and they fit. I have some of the glue in rivets and tested them again and they fit her bracelet. Of course the 1/4 fit and plenty big enough.. I don't know much about the bracelets, I guess I better do some more hunting. I have some 1/4 outside dia. copper, but need to figure out what to buy for the smaller bead holes.
Thank you for the reply.
Cherri
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2012-12-05, 10:11pm
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Mr Brutus RIP
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Cherri
If you remind me (i'm off to bed) I can measure for mine...... I have a bracelet, beads, mandrels and I also have a digital caliper......SO I can take all the measurements and let you know. Email me in the am or so.
Thanks
Sue
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2012-12-06, 2:01am
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Where did you get your glue in rivets ? Are they SS ?
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Anne
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2012-12-06, 2:14am
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Melody of Glass
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The "fits Pandora" tubing from Ginko works perfectly for me and fits nicely on Pandora and Amore and Baci. I believe it fits the others as well but I've not tried. I should double dip the 3/16 but I don't. I use a rotary tool to slightly enlarge the holes to fit the tubing.
My experience with the aluminum was that it split too easily when I tried to flare it. I went to ss but there is a bit of a price difference!!
The descriptions talk about mandrel size.
http://www.etsy.com/shop/ginkodesigns#
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2012-12-06, 7:22pm
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Here is the information that I've copied from several sources. Hopefully it's correct.
Pandora style use a 3/16th mandrel if you plan on coring them. If you don't, then make them on a 5/32.
Pandora chains are 4.2mm
Biagi chains are 4.1mm
Troll chains are less than 4mm
European chains, the minimum hole size is 4.37mm
Uncored beads made on 5/32" mandrels will fit because 5/32" is 0.15625" which is 3.96875mm provided that your bead release is 0.2mm thick
If you core your beads and want to use 3/16" mandrels, you must get the special sterling silver tubings Debbi Hackeson/ginkodesigns worked with Indian Jewelry Supply to custom produce the ONLY 5.08mm tubings that will fit Pandora chains allowing you to use 3/16" mandrels. 27 gauge, 5.08mm OD, 4.37mm ID are the important specifications. The standard 3/16" tubings from Rio Grande and other suppliers will NOT work. http://www.etsy.com/shop/ginkodesigns
Even then, the mandrel is 3/16" which is 4.7625mm. The tubing is a smidge over 5mm. Thus if you have a thin coat of bead release, you do need to dremel the hole out a bit to fit.
Like I said this is just accumulated information. I've never done any coring. Hopefully it's correct and helpful.
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2012-12-06, 8:37pm
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That pretty much covers it. Let me know if I can help out. Dave at Art in the Round has good information on his site, and makes a great coring tool. A simple plumbers tube cutter works well for cutting the tubing.
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Available in my Etsy: Fits-Pandora tubing in silver, copper, brass and aluminum.
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2012-12-07, 5:13pm
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professional gimme fiver
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Hi Cherrie,
When I started coring about 2 yrs. ago, I made a list of resources that had good tips & info. I'll share it with ya:
A good discussion on coring
http://lampworketc.com/forums/showthread.php?t=4386
Youtube video on how to prepare your metal tube
http://www.youtube.com/watch?v=_d_-d...eature=related
Tubing discussion, including sizes
http://lampworketc.com/forums/showth...=silver+tubing
Hole size & mandrel size discussion
http://lampworketc.com/forums/showth...andora+mandrel
When I first started coring (and realized how expensive a foot of silver tubing is) I decided to practice using copper & brass. I went to the hardware store with a couple beads in my pocket and used them to measure what size tubing I needed. Of course, silver feels a bit different from copper or brass when you core it, but there are plenty of skills a new corer needs to practice that are applicable for cheap brass & copper instead of using your expensive silver. I know Ginko on Etsy also sells aluminum, so you could practice on that, too. Likewise, you'll find some at your local hardware store, usually in with the copper & brass.
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2012-12-11, 9:22am
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Thank you everyone... Sorry for the delay. sort of slammed at work with Christmas orders. I will check out all the information. Thank you again.
Cherri
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2012-12-11, 10:44am
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da General
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Quote:
Originally Posted by PiP
Pandora chains are 4.2mm
Biagi chains are 4.1mm
Troll chains are less than 4mm
European chains, the minimum hole size is 4.37mm
Uncored beads made on 5/32" mandrels will fit because 5/32" is 0.15625" which is 3.96875mm provided that your bead release is 0.2mm thick
If you core your beads and want to use 3/16" mandrels, you must get the special sterling silver tubings Debbi Hackeson/ginkodesigns worked with Indian Jewelry Supply to custom produce the ONLY 5.08mm tubings that will fit Pandora chains allowing you to use 3/16" mandrels. 27 gauge, 5.08mm OD, 4.37mm ID are the important specifications. The standard 3/16" tubings from Rio Grande and other suppliers will NOT work. http://www.etsy.com/shop/ginkodesigns
Even then, the mandrel is 3/16" which is 4.7625mm. The tubing is a smidge over 5mm. Thus if you have a thin coat of bead release, you do need to dremel the hole out a bit to fit.
Like I said this is just accumulated information. I've never done any coring. Hopefully it's correct and helpful.
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All of the above information is from my first post of the Big-Hole Bead Exchange. There are more information in that post and throughout the exchange thread if you are interested.
http://www.lampworketc.com/forums/sh...d.php?t=166167
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Hayley
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2012-12-11, 5:21pm
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Melody of Glass
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Wow, Hayley....when you're done with earrings, looks like it might be time for a BHB4!
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2012-12-13, 4:46am
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Great info around.
Does anyone know of a European supplier of the premade silver cores ? The kind you wind the glass onto ?
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Anne
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2012-12-13, 6:25am
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Renee
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I have some tubing in the garage sale that fits 5/32. I got it from Rio.
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2020-11-18, 8:51am
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Does anyone know where I can get the silver tubing that Ginko used to sell? Her supplier of course is no longer in business and this tubing was always so perfect for BHB on a 3/16 mandrel. I stopped coring several years ago and want to get back into it. Thanks.
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2020-11-18, 1:19pm
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Santa Fe Jewelry supply Item # 118205
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2020-11-20, 6:00pm
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Thanks Kathy!
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2020-12-27, 12:07pm
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Thank-you Kathy, I was looking at all the old posts and getting confused. Most of the old links, part numbers didn't work.
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