owelly
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| posted on 5/5/06 at 08:31 PM |
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Tungsten Carbide
One of the chaps I work with wants a piece of tungsten carbide. He's after a piece about 2" by 1"dia.
It's for a dragster engine. Something to do with balancing the crank. TBH I wasn't really listening, but it was definately a piece of
tungsten carbide!!
Any ideas??
Cheers, Owelly.
http://www.ppcmag.co.uk
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flak monkey
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| posted on 5/5/06 at 08:32 PM |
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Get your wallet out.... 
Sera
http://www.motosera.com
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owelly
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| posted on 5/5/06 at 08:36 PM |
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He's not short of a few quid but his engine builder has told him he is waiting for the tungsten carbide to finish his engine. he suspects the
guy is just stalling so he wants to get the stuff and give it to him to get the motor back and fitted ready for some upcoming event.
http://www.ppcmag.co.uk
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flak monkey
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| posted on 5/5/06 at 08:46 PM |
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What on earth would you want it for?
Its nearly impossible to cut/shape by conventional means. It is afterall used as tooling on many machine tools. Its also incredibly brittle.
Tools made of WC are not actually solid. They are what is known as cemented carbides. Basically fine grains of WC stuck together with a softer metal,
such as cobalt. When heated the cobalt melts and runs between the WC grains sticking them together. Tools are made in their finished shape normally,
with their edges ground using diamond wheels to produce a sharp edge.
Where you would get a lump that big I have no idea.
You sure he didnt need a carbide TOOL to machine the crank?
[Edited on 5/5/06 by flak monkey]
Sera
http://www.motosera.com
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owelly
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| posted on 5/5/06 at 08:55 PM |
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??????????????
I'm sure when he see's the cost he will think again! I'm not sure were he is going to stick it....
http://www.ppcmag.co.uk
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DarrenW
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| posted on 5/5/06 at 09:47 PM |
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quote:
Originally posted by flak monkey
Get your wallet out....
Ditto that if it even exists. The only TC ive seen are lathe tools or Sandvik type milling cutter tips. ive never seen a solid lump that size and no
idea what you'd use to cut it.
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muzchap
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| posted on 6/5/06 at 12:21 AM |
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Next he'll be asking for a GLASS HAMMER 
I saw it last, next to the 'Long weight'
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If you believe you're not crazy, whilst everybody is telling you, you are - then they are definitely wrong!
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MikeR
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| posted on 6/5/06 at 07:31 AM |
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ah, sorry, i moved it, i needed a left handed screw driver and it was in the way. Its now over by the short stand.
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Hellfire
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| posted on 6/5/06 at 08:04 AM |
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I'll see what I can do - I can get 2" x 1" x 1/2" slab for £10ea which is next to nowt, but it will need grinding. Green Grit
grinding wheels grind TC pretty easily. Cemented Carbide (Cermet) is not suitable as it is inherantly lighter and he needs the weight.
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NS Dev
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| posted on 11/5/06 at 12:10 AM |
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Just reading with some amusement!
As Hellfire answered, Tungsten Carbide isn;t that pricey, and certainly is available for things other than tool tips!
We use solid carbide drills regularly, but they aren't a patch on CuBN (Cubic Boron Nitride) drills!
Tungsten Carbide is regularly used for injection moulding tools, and if I remember correctly is usually shaped either by grinding for simple shapes or
spark erosion for complex stuff.
Sadly I don't have any lumps handy though!
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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johnjulie
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| posted on 25/5/06 at 09:28 PM |
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Does he want it to make a cutting tool for a lathe or something similar? To balance a crank. you would remove metal, not add it.
Cheers John
JFDI
"Just F*****G Do It"
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