AW: [meteorite-list] CBN blades

From: Andreas Gren <*info_at_meteoritecentral.com*> Date: Mon Jan 3 16:19:59 2005 Message-ID: <200501032119.j03LJs8N011994_at_post.webmailer.de> · info_at_meteoritecentral.com

--
Eric Olson
ELKK Meteorites
http://www.star-bits.com
> I dont like the CBN blades either. They are the best
> that you can buy for about two minutes and then pretty
> much stop working.
> I have had people tell me that they will work cutting
> iron meteorites which you pretty well cant do using
> diamond but I havent done it myself so wont comment on
> cutting irons.
> But as far as chondrites go, I have tried them all,
> various lubricants ect and what I use is pro slicer.
> They are cheap and I buy them from the manufacturer 50
> at a time to get the lowest wholesale price. Over the
> past couple of years years I have used hundreds and
> hundreds of blades. 
> There is a brand name called MK and one of their
> blades are better than pro slicer but costs $70 (The
> similar priced MK model is not as good as pro slicer)
> so I dont use it because the higher costs cancels out
> its benefit. The worst blade that I have ever used is
> a brand called "ADVANTAGE". Not sure what the thing is
> supposed to do but it warp in about 15 seconds and
> sort of fall apart within a minute. The advantage
> blade I guess are designed for granny or the 4 year
> old kids so that they dont cut themselves if they
> break into your workshop sleepwalking at 3am. I cant
> think of another reason for that sad experimit in
> blade making that should be forgotten or never made in
> the first place like a wesley snipes vampire movie.
> Remember that us meteorite people are using blades for
> things that is pretty much over and above what
> manufacturers design blades for. The 20% or so iron is
> hard and makes things hot. Taking a break every couple
> minutes will likely save saw blade life. If you have
> two saws alternating between the two every 5 minutes
> will likely greatly increase the blade life as they
> will have time to cool down. 
> I suspect that meteorite people have differing
> opinions on blade life than people cutting other types
> of material. Meteorite people have differing needs
> than many other rockhounds including the hardless,
> fracture lines and cost of material.
> Cheers
> DEAN
> 
> 
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> 
> --- Midwest Meteorman <campoman_at_earthlink.net> wrote:
> 
> > Thanks for sharing this with us.
> > 
> > Tim Heitz
> > 
> > 
> > 
> > 
> > 
> > ----- Original Message ----- 
> > From: "Michel Franco" <michel_at_caillou-noir.com>
> > To: "almitt" <almitt_at_kconline.com>; "Andreas Gren"
> > <info_at_meteoritenhaus.de>
> > Cc: <meteorite-list_at_meteoritecentral.com>
> > Sent: Monday, January 03, 2005 4:18 AM
> > Subject: Re: [meteorite-list] CBN blades
> > 
> > 
> > > Hello list;
> > >
> > > I have some experience in cutting as I had an
> > order of 4000 stamp size 
> > > slices for new year's Eve cards ! I was cutting  
> > Sahara 02500 L3.
> > >
> > > Before this mass cutting I had used CBN or diamond
> > blades since 1998 in 
> > > cutting meteorites. I have 3 blade saws from 4 "
> > to 15 " diameter. The 
> > > smaller with adjustable speed. The 2 bigger with
> > high speed. Several home 
> > > made sample holders.
> > >
> > > TRo cut these stamp slices I cut thick slices 12
> > to 15 mm thick with a 1.8 
> > > mm 405 mm dia diamond balde. Then I prepared bars
> > from the slices, either 
> > > with 0.4  or 0.6 mm thin CBN or with 1 mm thin
> > Diamond blade. then I 
> > > sliced up the stamp size using both techniques.
> > >
> > > Definitly CBN blades do not last long. I started
> > cutting with CBN, ran out 
> > > of blades, ordered new blades, ran out again, and
> > finally finished the job 
> > > with an old diamond blade 1 mm thin.
> > >
> > > I have made all experiences possible with cutting
> > oils, speed etc.
> > >
> > > Diamond blades last more than 50 times more.They
> > are a bit thicker but 
> > > their longlife compensate by far the slightly
> > higher  cut loss.Another 
> > > aspect is the cutting time. Diamond blades cut
> > much faster. I was able to 
> > > cut 500 stamp size pieces a 8 hour work day using
> > 3 CBN blades, and I cut 
> > > 1500 stamp size slices with my usual Diamond
> > blade, still in good cutting 
> > > shape in the same time.
> > >
> > > My conclusion is CBN blades cut when new, but do
> > not last long at all. 
> > > They are quite expensive and I will not recommand
> > these CBN blades even 
> > > for stony meteorites.
> > >
> > > You can use them for very expensive material,
> > useless for mass production, 
> > > or if you cut a lot of material. Your cutting time
> > becoming a factor you 
> > > must take in consideration.
> > >
> > > CBN do not like high shock level,  at all.
> > >
> > > My 2 cents
> > >
> > > Michel
> > >
> > >
> > >
> > > ----- Original Message ----- 
> > > From: "almitt" <almitt_at_kconline.com>
> > > To: "Andreas Gren" <info_at_meteoritenhaus.de>
> > > Cc: <meteorite-list_at_meteoritecentral.com>
> > > Sent: Tuesday, December 28, 2004 7:41 PM
> > > Subject: Re: [meteorite-list] CBN blades
> > >
> > >
> > >> Hi Andreas,
> > >>
> > >> Hard to say what the problem is without some
> > other imput. First it 
> > >> depends what
> > >> you were cutting. If you were cutting urelite
> > then if you got one cut out 
> > >> of it
> > >> you were lucky. If you are cutting stony then
> > something is wrong. If you 
> > >> are
> > >> cutting iron then maybe you have run into carbos
> > (small little diamonds) 
> > >> or a
> > >> lot of schreibersite plates. The problem could be
> > with the blades 
> > >> themselves not
> > >> well made (usually the adhesive that binds the
> > cutting material on the 
> > >> blade can
> > >> be bad, or the way it was fused on the blade.
> > >>
> > >> The cutting material on the blade could also be
> > bad and not as hard as it
> > >> should. Sometimes it has to do with the cutting
> > fluid and the angles it 
> > >> goes on
> > >> at. Sometimes items cut really well and other
> > times when the fluid isn't
> > >> adjusted right then it can cause cutting
> > problems. I myself have been
> > >> experiencing cutting problems with these blades
> > (and why I have 
> > >> responded) and
> > >> it leads me to believe that there is a problem in
> > their manufacturing 
> > >> somehow.
> > >> They are useful but if they don't last then they
> > are useless. All my best 
> > >> to you
> > >> and everyone else who finds this useful.
> > >>
> > >> --AL Mitterling
> > >>
> > >> Andreas Gren wrote:
> > >>
> > >>> Hello List
> > >>> I have some question about CBN blades.
> > >>> Now I used a 8'blade 0,12'thick for reducing the
> > cut lost and after two
> > >>> small cuts al the CBN is lost in bits and now I
> > have a bright metal 
> > >>> blade. I
> > >>> bought the blades from different dealers. I
> > always use oil for cooling.
> > >>>
> > >>
> > >>> Now the questions:
> > >>> Did anyone had the same problem? Are there
> > different producers of CBN
> > >>> blades?
> > >>> Is it a quality problem? Have I done something
> > wrong?
> > >>> I think the blades are a little bit to expensive
> > to throw them away 
> > >>> after
> > >>> one use.
> > >>>
> > >>> Thanks
> > >>> Andi
> > >>
> > >> ______________________________________________
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> > >
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