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UHMWPE better than Nylon 66 for wear properties?

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bry1975:
Yup they say Nylon has enough grades to cover just about everything.

Have you ever looked at Iglidur plastic bearings? also Igus do some handy energy chains.

fatal-exception:
Black UHMW is very easy to machine by all normal methods. I've produced a few tanker trucks full of chips from CNC machining this material. Typical feed rates that I use are 200IPM with a 1/4" end mill, 1/8" to 1/4" DOC, 25-30kRPM. 2 Flute polished solid carbide tools are the best IMO.

Yes, this stuff dosen't really melt. I've tried to reform it, but it just becomes brittle when it cools. I'm sure I'm missing something there.

We also use the natural white UHMW for steel on plastic sliding parts in industrial machinery for the grain industry. The 'wipers' and 'slides' last a very long time, and are highly resistant to grain flowing over them.

John Hill:
A very interesting topic...

I have some scraps of engineering plastic, small bits of sheet and some thicker blocks, black and white bits.  How can I tell what is what among these bits?  Does it really matter?

My last project was a power feed for my mill using an aluminium plate worm wheel and a worm cut from stainless steel.  I dont think the wheel will lost for long so I am casting around for alternatives.  Can I heat and pressure form a new worm wheel?

Thanks

john

dvbydt:
John,

Plastics Identification - this might help.

http://ixian.ca/pics8/plastics.gif

Ian

Rob.Wilson:

--- Quote from: dvbydt on January 19, 2012, 06:45:53 AM ---John,

Plastics Identification - this might help.

http://ixian.ca/pics8/plastics.gif

Ian

--- End quote ---

Thanks for sharing that Ian  :clap: :clap: :clap: :thumbup:

I too have a box of assorted plastics that i have no idea of what type they are ,,I stand a fighting chance now  :thumbup:



Rob

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