Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
搜索矿物的性质搜索矿物的化学Advanced Locality Search随意显示任何一 种矿物Random Locality使用minID搜索邻近产地Search Articles搜索词汇表更多搜索选项
╳Discussions
💬 Home🔎 Search📅 LatestGroups
EducationOpen discussion area.Fakes & FraudsOpen discussion area.Field CollectingOpen discussion area.FossilsOpen discussion area.Gems and GemologyOpen discussion area.GeneralOpen discussion area.How to ContributeOpen discussion area.Identity HelpOpen discussion area.Improving Mindat.orgOpen discussion area.LocalitiesOpen discussion area.Lost and Stolen SpecimensOpen discussion area.MarketplaceOpen discussion area.MeteoritesOpen discussion area.Mindat ProductsOpen discussion area.Mineral ExchangesOpen discussion area.Mineral PhotographyOpen discussion area.Mineral ShowsOpen discussion area.Mineralogical ClassificationOpen discussion area.Mineralogy CourseOpen discussion area.MineralsOpen discussion area.Minerals and MuseumsOpen discussion area.PhotosOpen discussion area.Techniques for CollectorsOpen discussion area.The Rock H. Currier Digital LibraryOpen discussion area.UV MineralsOpen discussion area.Recent Images in Discussions
Techniques for CollectorsTrimming techniques
15th Mar 2012 00:11 UTCRon Layton
15th Mar 2012 08:31 UTCMichel Ambroise
For very hard matrix, it's sometime very good to "precute" the stone with a electrical saw.
Then the trimming is easier and normally break where you want.
Make sure that the twochisel are really "press" against the stone, then you can pump...
Good luck and don't forget to start with some non "valuable" specimens to make your experience.
Every place where you collect, the matrix change, so it's always a new experience.
michel
15th Mar 2012 11:43 UTCRock Currier Expert
16th Mar 2012 17:24 UTCRon Layton
http://i32.photobucket.com/albums/d27/micron327/mining/100_0695.jpg
http://i32.photobucket.com/albums/d27/micron327/mining/100_0690.jpg
16th Mar 2012 18:43 UTCAnonymous User
Please could any one tell me
How can I get my hand on one of these?
Regards
Schalk
17th Mar 2012 00:22 UTCSteve Hardinger 🌟 Expert
17th Mar 2012 12:58 UTCMichel Ambroise
-------------------------------------------------------
> I should clarify my post. The Meister trimmer is a
> screw type. I fell victim to one of those little
> "C" clamp jobs and a Chinese hydraulic back in the
> late 90's at the Denver show. Both were sad
> excuses. Even though the Chinese one had been
> worked over by a dealer, it still didn't make it
> to a year of normal use. It would have been a nice
> trimmer if it were engineered correctly. I won't
> even bother talking about the "C" clamp. The best
> part about using the baggies to hold the specimen
> is not only do you get to see everything that came
> off during the trim but you keep dust out of the
> screw which to me is a major pain. Here are a few
> photo's of the Meister trimmer.
>
> http://i32.photobucket.com/albums/d27/micron327/mi
> ning/100_0695.jpg
> http://i32.photobucket.com/albums/d27/micron327/mi
> ning/100_0690.jpg
Unless for soft matrix and to prepar final micromount, i don't see any use for this type of trimmer......
It's totally unusable because you need your two hands to be efficient.
On a classic one it's good to keep one hand on the specimen in order to make sure to keep all the pieces if you make micro.
17th Mar 2012 18:05 UTCLuca Baralis Expert
On very hard cristalline matrix the time between pressing and cracking can be quite long (ten or more minutes, too).
17th Mar 2012 18:26 UTCDon Saathoff Expert
Don
18th Mar 2012 04:18 UTCRock Currier Expert
I have sent Annie Meister an email to see if these are still available. Her father used to run a machine shop and he was interested in gems and minerals to the extent that he he eventually became president of the American Association of Mineralogical societies and manufactured his own brand of faceting lap and these trimmers as well. If they are still available, Ill put you in touch with her.
18th Mar 2012 17:49 UTCRon Layton
http://i32.photobucket.com/albums/d27/micron327/mining/meistertrimmer.jpg
18th Mar 2012 18:33 UTCRolf Brandt
1st Apr 2012 13:13 UTCLuca Baralis Expert
Under my trimmer the chisel slide away, so I'm thinking about a V-shaped basement.
12th Apr 2012 03:08 UTCRon Layton
22nd Apr 2012 14:17 UTCLuca Baralis Expert
31st May 2012 16:54 UTCTim Jokela Jr
King of the trimmers is your basic core splitter. You lower it to the rock and then thwack it with a hammer. Apparently more are becoming available as mining co's go over to sawing core instead of splitting; keep an eye out if you frequent mining or coring operations, you might pick one up for a hundred or even free. Can't tell you how much I love these things; I've kicked the crap out of mine and it's still functioning ok, though the spring's gone, bolts are falling out, and the top hammer bit doesn't go down on it's own anymore lol. Definitely need to luck into another one. Has only been defeated by a fist sized piece of pectolite-fibre-included marble from Saint-Hilaire, that stuff is the devil, worse than the silicified dolomite of Herkimer, NY.
Flying chip retention is accomplished by sticking rags or gloves over the rock. Box in the back to catch stuff. Nothing fancy is needed.
Anything fragile, like a nice fluorite crystal, should be sawn out, there's no excuse for not owning some tool that can cut rock quickly, be it a tile saw, diamond blade in a skill saw or angle grinder, small handheld glass cutter, or full on concrete saw. Your average hardware store should have one option or another, for under $100. An inch deep cut combined with skinny wedges makes perfect breaks.
When in doubt, don't risk it, saw it!
5th Jun 2012 17:48 UTCAnonymous User
What is the problem with your Chinese trimmer and where are you located?
They are usually an easy repair to the pump.
The Chinese trimmers had the advantage of size and a stout build. The problem of designing one and manufacturing is a lot of money.
I use a thick clear plastic sheet cut to fit around the shaft of the lower chisel and draped over the bottom beam to keep grit out and provide a soft landing. The trimmer is set unattached in a cardboard box cut low in the front and angling up to a high back to keep flying debris in.
Dennis
22nd Jun 2012 02:51 UTCDavid Zimmerman (2)
22nd Jun 2012 08:51 UTCRock Currier Expert
22nd Jun 2012 12:44 UTCBart Cannon
I will also confirm that a core splitter is an excellent option with a less explosive rupture. They have square shouldered threads and are completely indestructable.
There are other methods I use. For boulders, the Micro-Blaster can be used with good precision. For smaller, but very large pieces, drilling holes and filling the holes with expansive mortars can work well, with luck.
And then there is a monument company in New Englad that sells tiny plugs and feathers. Drill a row of holes and enjoy the ping, ping, ping and then the lovely pop when the boulder splits. No flyrock whatsoever.
And sometimes there is no option but the diamond saw for getting the specimen into the jaws.
This is not even my job anymore. I hope none of my clients are reading my posts and getting annoyed at why I am not on their project.
Bart
22nd Jun 2012 15:49 UTCHarold Moritz 🌟 Expert
http://www.absoluteclarity.com/splitters.htm
I use the mid-sized one all the time with great success. Difficulty stems from when the sides of the specimen are not very parallel, so piece tends to slip out. I like the idea mentioned above about cutting some slots in the piece for the chisels to sit in, thanks for that!
Regarding the comment that one needs two hands to use this type of splitter, generally you must bolt or clamp the unit to a big table, then no problems. Once the specimen is set in the chisels, you can use two hands to advance the screw. You cant physically tighten this unit enough to explode a rock, so very safe. Overtightening will ruin the threads anyway. Everything has its limitations!
23rd Jun 2012 05:22 UTCDavid Zimmerman (2)
The hessonite garnet plate is from Jeffrey's Mine, Asbestos, Quebec, Canada. Would you mind dropping the name of the air chisel that you think is the best? To clarify your answer on value: While I know there is no industry rule, is it pretty factual to state that saw-marks on the backside do significantly reduce the specimen's value?
23rd Jun 2012 18:31 UTCJohn Lichtenberger
http://i3.photobucket.com/albums/y62/auplater/RCKSPLT1.jpg
24th Jun 2012 12:08 UTCRock Currier Expert
24th Jun 2012 14:10 UTCRobert Farrar
The company that has designed and is manufacturing pneumatic tools geared toward fossil preparation is PaleoTools of Brigham City, UT. We use their tools for projects of all scales - for detail work under the microscope as well as to remove limestone matrix from ammonite fossils. There should be several tools in their line applicable to working matrix on mineral specimens.
Bob
24th Jun 2012 15:07 UTCDavid Zimmerman (2)
John....that's too funny! :)-D I've been wondering about doing that for a long time now, but since I don't burn wood, it would only be used for rocks. What kind of rocks have you split with that? I'm sure sedimentary rocks, but do the harder granites and such also split? I would assume there is a safety pressure blow-back valve on those when overloaded, which is normal on most pneumatic cylinders...but a verification would be great to know. I'd love to hear some of your "log" splitting stories about applications.
版权所有© mindat.org1993年至2024年,除了规定的地方。 Mindat.org全赖于全球数千个以上成员和支持者们的参与。
隐私政策 - 条款和条款细则 - 联络我们 - Report a bug/vulnerability Current server date and time: 2024.4.25 06:28:54
隐私政策 - 条款和条款细则 - 联络我们 - Report a bug/vulnerability Current server date and time: 2024.4.25 06:28:54