Source for graphite piston material

You need pure graphite, or one of the many graphite impregnated materials? http://www.boedeker.com/search.htm is where I usually buy my plastics and they do have many with graphite in them. I've only used some sheet graphite in pure form, for vanes in an air motor of sorts, but it was customer furnished, so not aware of that source.
 
We have dealt with SGL Group for most of our needs. At times we have purchased from CMS Graphite but I believe that it was bought by SGL Group not too long ago.

I suspect that you will need premium die grade carbon. It appears that the link is for that type.
Pierre
 
I don't wish to hijack this thread but, can someone point me to information about using graphite for machining purposes (if that's even possible)? I'm thinking of using it for intake fan blades that spin up in the 100,000 to 120,000 RPM range...

Thanks

Ray
 
Ray C said:
I don't wish to hijack this thread but, can someone point me to information about using graphite for machining purposes (if that's even possible)? I'm thinking of using it for intake fan blades that spin up in the 100,000 to 120,000 RPM range...

Thanks

Ray
Click to expand...

I know used to be in our Pumps, used at my last job for two vacuum pumps, vanes were Graphite.

Jeff
 
Ray,
I'd be concerned about the mechanical properties limiting the structural integrity in that application, given the centrifugal forces at those speeds. I also have the same question. You need pure graphite for that? There are probably materials containing reinforcing elements that would endure it. And as I'm sure you are aware, you'll need balancing pretty high up in the G1 scale, probably.
 
Oh yes... I'm aware that graphite is used for turbo fan blades. The ones I know of are hand made with multiple layers of thin material epoxied together. I was wondering if it exists in solid form and can be machined. Right now, I'm using 70-series aluminum (individually machined blades on a hub/spoke yoke) and can spin up to desired speed but it would sure be nice to cut the weight in half...

Thanks for pointing that article out... OK, back to normal topic as not to hijack the thread.


Ray


pdentrem said:
Do you mean like this? Composite blade?

http://papers.sae.org/710771/

Pierre
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I'm thinking the same thing Tony... What little I know about graphite tells me that, in solid form, it won't have the yield strength I need. It didn't strike me as the type of material that can be machined but maybe there are new varieties now. I'll research more.

Tony Wells said:
Ray,
I'd be concerned about the mechanical properties limiting the structural integrity in that application, given the centrifugal forces at those speeds. I also have the same question. You need pure graphite for that? There are probably materials containing reinforcing elements that would endure it. And as I'm sure you are aware, you'll need balancing pretty high up in the G1 scale, probably.
Click to expand...
 
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