[meteorite-list] CBN blades

From: dean bessey <deanbessey_at_meteoritecentral.com>
Date: Mon Jan 3 07:54:53 2005
Message-ID: <20050103125451.54141.qmail_at_web12309.mail.yahoo.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
















--- 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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> >
> >
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Received on Mon 03 Jan 2005 07:54:51 AM PST