farrow
starting to shine!
James D. Farrow
Member since April 2015
Posts: 31
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Post by farrow on Dec 20, 2015 9:38:42 GMT -5
I am looking at getting some (people refer to them by different names) ) "up eyes" or "eye ups" or "eye pins" etc... Here is an example of them: www.amazon.com/dp/B008SZY8L6/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=2W3NCMIGAJR6L&coliid=IRJ19LZSQIJEF&psc=1 I want to drill a whole in the top of pendants and then glue them in using epoxy. I found some that look O.K at Fire Mountain Gems and (at the above link) Amazon. Fire Mountain Gems says the pegs are approximately .8mm in diameter, and the ones at Amazon say .7mm in diameter. Using an on-line conversion chart, that comes to approx. 1/32" (0.794mm) Here is the conversion chart I used: www.penn-union.com/ref%20material/Millimeter%20Decimal%20Fraction%20Conversion%20Chart.pdf Looks like the Fire Mountain ones are the closest to 1/32". I would still have to play a little with the hole or the peg to make it fit though. Don't know how difficult that would be. Now, trying to find 1/32" diameter diamond core bits is really frustrating. No luck at all. Google doesn't like 1/32 or 1/32" in the search terms and gives all kinds of non-applicable results. Anyone know where I gat get the diamond core bits in 1/32" diameter size? Thanks, James
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Post by mohs on Dec 20, 2015 9:46:52 GMT -5
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RocknCritter
spending too much on rocks
Member since November 2008
Posts: 489
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Post by RocknCritter on Dec 20, 2015 19:12:57 GMT -5
Core drills from 1 mm to 3.5 mm. link
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farrow
starting to shine!
James D. Farrow
Member since April 2015
Posts: 31
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Post by farrow on Dec 21, 2015 17:17:21 GMT -5
Thanks Ed! Will check it out.
RocknCritter, their smallest size (1mm) is to large. I need a 1/32" (0.794mm) diamond core drill bit.
That's the trouble I have finding.
James
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Post by jakesrocks on Dec 21, 2015 17:57:26 GMT -5
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farrow
starting to shine!
James D. Farrow
Member since April 2015
Posts: 31
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Post by farrow on Dec 21, 2015 18:48:42 GMT -5
Only 1mm for the smallest one.
Maybe I would be better off looking for larger "up eyes" or "eye ups" or "eye pins". LOL!
James
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Post by MrP on Dec 21, 2015 19:28:36 GMT -5
Try Kingsley North..........................MrP
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Dec 21, 2015 21:14:35 GMT -5
I don't know how much experience you have with such small bits,from my past experience it's like trying to drill a hole with a diamond crusted piece of hair.slow process,especially when drilling MOH 5&up,I'd look for larger findings,just my two sense Dave
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RocknCritter
spending too much on rocks
Member since November 2008
Posts: 489
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Post by RocknCritter on Dec 21, 2015 21:36:47 GMT -5
I don't know how much experience you have with such small bits,from my past experience it's like trying to drill a hole with a diamond crusted piece of hair.slow process,especially when drilling MOH 5&up,I'd look for larger findings,just my two sense Dave I'm with Dave. The difference between 1 mm (the smallest core drill available) and your findings (.8 mm) is about the same thickness as two sheets of paper. Since the manufacturing tolerances on the findings likely vary quite a bit combined with a little room for whatever adhesive your using, a .2 mm difference is insignificant. I really doubt anyone can even distinguish the difference between .8 mm and 1 mm without magnification. Trying to drill a multitude of tiny holes in harder gemstones seems like a recipe for endless frustration.
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Post by mohs on Dec 21, 2015 21:42:19 GMT -5
I have no experience with drilling tiny holes and from all I've read- I'm not sure I want any I suppose if holes were easy to drill heart pendants would be the next big thing
I use the 1/32 eye-pins I use to use diamond burrs drill out the epoxy would get 4 hearts drilled-- then the burrs were useless and they were like 3 dollars a pop expensive --just to drill out epoxy
then I got smarter and started using steel bits inexpensive and they last a long time
anyway --I have an idea for drilling a small hole in rock Those under 1mm diamond burrs are flimsy and expensive
What if you used a sturdier diameter burr say 1/8”-- drill out the hole --then fill that hole with a toothpick then drill out a 1/32” hole with a steel bit ? then epoxy in your eye pin.
I'm not sure its a solution or doable but its seem to me a sturdier bit wold make the drilling easier.
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Post by MrP on Dec 22, 2015 5:32:38 GMT -5
I don't know how much experience you have with such small bits,from my past experience it's like trying to drill a hole with a diamond crusted piece of hair.slow process,especially when drilling MOH 5&up,I'd look for larger findings,just my two sense Dave I'm with Dave. The difference between 1 mm (the smallest core drill available) and your findings (.8 mm) is about the same thickness as two sheets of paper. Since the manufacturing tolerances on the findings likely vary quite a bit combined with a little room for whatever adhesive your using, a .2 mm difference is insignificant. I really doubt anyone can even distinguish the difference between .8 mm and 1 mm without magnification. Trying to drill a multitude of tiny holes in harder gemstones seems like a recipe for endless frustration. I am with both @arrowheadave and RocknCritter It is difficult to drill holes in agate. I have drilled many hundreds of holes using Tripple Ripple bits from Kingsly North. When you get 20 holes from 1 bit the cost is not so much. When you have to use 3-4 bits for 1 hole the cost goes way up. I found that 3-5 holes per bit was probably average but that was only after learning by drilling many holes. I bought the drills in 100 packs. The smaller the bit the harder it is to make it last. Drill under water with very little pressure. Nothing is cheap when working with rocks.
I have also used the pins you are talking about and having an over size hole is not a problem, it just gets filled with the epoxy.
I now use an Ultrasonic Drill, much better........................................MrP
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farrow
starting to shine!
James D. Farrow
Member since April 2015
Posts: 31
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Post by farrow on Dec 22, 2015 16:38:56 GMT -5
Thanks everyone. You are right. The difference is negligible. I guess I was just looking at the numbers and not really interpreting them.
I will check out the links and suggestions.
Thanks again!
James
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Post by johnjsgems on Dec 22, 2015 18:55:17 GMT -5
Wouldn't a wire drill or Tripple Ripple type drill work better since you are not drilling all the way through? Wire drills run .75mm then up to 1mm. I'm guessing 1mm is what you need to have tolerance to fit the .8mm pin. The hole has to be larger to fit pin in.
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Post by Rockoonz on Dec 23, 2015 23:01:16 GMT -5
.2mm is .008" That is such a tight tolerance that with the glue on it you will have difficulty pushing it into the hole, the air will have difficulty escaping around it.
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