Originally Posted by
armygreywolf
You need a materials engineer, someone who knows what certain parts need to be manufactured from for maximum durability. Even at 70g has nobody considered the use of coatings? Silicon carbide can be "coated" to a variety of high strength metals. If you manufacture from plastics, the obvious choice for abrasion resistance and natural lubricity would be Delrin.
Delrin is the wear pad material found on
forklift sideshifter mechanisms, crane wear and stage pads, delrin is also often used to prototype because it is quite strong.
This centrifuge has an 18 year history behind it to back up its performance which has proven out time after time to do as it was claimed to do. There have not been any new machines built since around 2003 but you'll still find them in the field recovering gold along with the odd one showing up for sale.
So I'm not about to dumb it down with plastics to save a few dollars over purchasing the more expensive AR plate.
If I needed a materials engineer I would contact the University or use
google scholar to search for whitepapers related to a questionable material.
Abrasion resistant plastics,
http://scholar.google.ca/scholar?hl=en&q=abrasion+resistant+plastics&btnG=& as_sdt=1%2C5&as_sdtp=
What would be in my best interests would be to hire someone with a good track record in global marketing to generate revenue from sales.
Your concerned with 70 G's of artificially produced gravity then my small 6 inch centrifuge would have you running for the hills with it's 500 G's generated from a bowel spinning at 2500 revolutions per minute. And this bowel was made from poly.
On a side note: Delrin is also used in hip implants and heart valves.
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