[meteorite-list] CBN blades
From: star-bits_at_comcast.net <star-bits_at_meteoritecentral.com>
Date: Mon Jan 3 12:42:28 2005 Message-ID: <010320051742.22533.41D984000001852E0000580522007507849C9B070DD39D0E9B9C_at_comcast.net> I used a CBN blade to cut a piece of Henbury a couple years ago. The first slice took 12 minutes, the next 20, the next 35, the next 55 minutes. All had about the same surface area. At that point I took the rest of the meteorite out of the saw and sent it to Jim Hartman and paid him to cut and etch it. For my money that was a much better solution than buying CBN blades. -- 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 > > > > > > > > > > > > > > > > > --- 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 > > >> > > >> ______________________________________________ > > >> Meteorite-list mailing list > > >> Meteorite-list_at_meteoritecentral.com > > >> > > > http://six.pairlist.net/mailman/listinfo/meteorite-list > > > > > > > > > ______________________________________________ > > > Meteorite-list mailing list > > > Meteorite-list_at_meteoritecentral.com > > > > > > http://six.pairlist.net/mailman/listinfo/meteorite-list > > > > > > > ______________________________________________ > > Meteorite-list mailing list > > Meteorite-list_at_meteoritecentral.com > > > http://six.pairlist.net/mailman/listinfo/meteorite-list > > > > > > > __________________________________ > Do you Yahoo!? > Yahoo! Mail - now with 250MB free storage. Learn more. > http://info.mail.yahoo.com/mail_250 > ______________________________________________ > Meteorite-list mailing list > Meteorite-list_at_meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-listReceived on Mon 03 Jan 2005 12:42:24 PM PST |
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