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Welcome new members & old from the Lapidary/Gemstone Community Forum. Please join up. You will be approved after spam check & you must manually activate your acct with the link in your email

Congratulations to irockhound and his Condor Agate cab!

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Another cabochon contest coming soon!

All new members, just an FYI -- we are moving to a new server so there is a slight possibility you may have to re-register, not much possibility but a slight chance. if you are accidently left out of the move, please re-join. we are moving to a new hosting with better services. The move should be glitch free, but glitch free doesnt always happen 100%. Randy.
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 1 
 on: Today at 06:51:37 PM 
Started by FLRocks - Last post by FLRocks
Another at-a-boy for Phil. Received my last shipment today the cabs were very good. I need to set the cabs so I can buy more turquoise.  :Worthy:  :blob1:

Bennett
 

 2 
 on: Today at 05:26:18 PM 
Started by Back - Last post by jerrysg
Shawn,

Tell me about warm. Here in the Tucson area we are having most days above 110. And even though we are in the desert, it's not cooling off during the night. Mornings start above 80. We generally work outside but the last couple of days we have brought the flat lap into the motorhome and it sits on the stove cover.  Not good for meals but we work around that.

Jerry

 3 
 on: Today at 03:43:45 PM 
Started by 55fossil - Last post by 55fossil
   I am looking at purchasing a lightly used 24 inch Covington. Price is not cheap but fair. But I do not know a darn thing about Covington saws.  Anyone have any experience with the bigger units like this?  From pictures I cannot tell if the carriage is all bearing mounted or just slides on rail. Also wondering if it uses an oil pump or just splashes oil with blade. It is not like what I am use to but that does not make it bad. So, advice and wisdom please....

 4 
 on: Today at 03:11:34 PM 
Started by Back - Last post by Back
Hi Jerry

Thanks for posting. It has me moving again. I could not find a piece of stainless that would fit. In the morning I will have time to go look in another pile for some kind of "plastic" I might have a piece of Delron or UHMW that would fit.

When the weather gets warm I am lucky to do anything in my lapidary shop. But when I get the new face on the saw I will have to go and test it. I have 2 preforms just waiting to be cut out.

Thanks Again

Bless
Shawn

 5 
 on: Today at 09:20:18 AM 
Started by Neural - Last post by Neural
The main purpose of the guard is to protect fingers.  Most angle grinders have far more power than you will need for what you propose unless you want to use a wire brush.  Those use more power.  There are also flap discs used for sanding.  As an  aside, if you look at any professional welders' grinders you will find that the guards are always removed as they wear gloves and the guards just get in the way.
incorrect, the main reason for the shield is to deflect a grinding wheel from lodging itself inside your head or other body parts if it cracks and breaks away from the grinder.



Gotta agree there.  I had a long discussion with the manufacturer of the wheels I'm using, as they are basically a sponge material (can squish them slightly with finger pressure).  I asked specifically about whether or not they would shatter.  His statement was that they've never in all the years of production seen one do such a thing.  Doesn't mean it can't happen, but the structure of the material is more something that would tear, than break (again, it's basically a denser version of a kitchen sponge).    They are rated for 13k rpm, and the grinder only goes 11k, so there is some margin of safety there. 
My concern, even with the guard on, is that there's an area that is *not* guarded, and I need to know if someone standing near by might also be in danger, and the basic answer was "no".

All that said, my plans hit a major snag, and I have had to put the whole project on hold.  I have to work outside, and the sun plus 115F heat resulted in the grinding wheel burning, leaving black marks in the aluminum.  That and it's a miracle the grinder itself didn't burn out.  It was hot on my hand through the gloves.  So.. I have to wait until fall. :/

 6 
 on: Today at 07:27:06 AM 
Started by ileney - Last post by ileney
No worries slabbercabber, I have an ancient, but perfectly safe dental flexshaft that I use for carving now and sometimes secure in a block; I just liked the solid steadiness of that carving station for two handed use and hoped to use my lathe for that, but obviously that won't work. Thanks to you and everyone for saving me from either shocking myself or shorting out the motor or both. Fortunately, I knew you guys would know what is safe.

 7 
 on: Today at 05:34:30 AM 
Started by ileney - Last post by Slabbercabber
Just to be clear.  The Foredom machine is sealed and carries UL approval.  The one you are looking at is an open motor and ungrounded.  I would not even hook up a flexshaft to that much less let water get near it.  The housing is double insulated making it legal to sell that way, but if a flexshaft is used, that feature is lost.

 8 
 on: June 22, 2017, 09:39:01 PM 
Started by tntmom - Last post by irockhound
With Agate there is no need to wet/dry during grinding or polishing.  The reason for doing it with jade it because of the fibrous nature of jade and achieving a better polish.  Std grinding techniques work fine with agates.

 9 
 on: June 22, 2017, 08:13:03 PM 
Started by Neural - Last post by Phishisgroovin
The main purpose of the guard is to protect fingers.  Most angle grinders have far more power than you will need for what you propose unless you want to use a wire brush.  Those use more power.  There are also flap discs used for sanding.  As an  aside, if you look at any professional welders' grinders you will find that the guards are always removed as they wear gloves and the guards just get in the way.
incorrect, the main reason for the shield is to deflect a grinding wheel from lodging itself inside your head or other body parts if it cracks and breaks away from the grinder.


 10 
 on: June 22, 2017, 06:40:34 PM 
Started by ileney - Last post by ileney
Thank you for all the advice everyone! I'll work something out one way or another.

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