> Can someonw please enlighten me, what is HPDE?
High Density PolyEthylene
aka Poor Man's Teflon(r) (PTFE)
Very low friction coefficient (not as low as PTFE), also melts at a
You'll also see UHMW PE (Ultra High Molecular Weight).
It's great stuff. Excellent dielectric properties, easy to machine (if
you have *sharp* tools), works great as a bearing material for low
speeds (e.g. mast bearing). Very inexpensive (cutting boards are the
most popular hobbyist source). It's used a lot in homebuilt HV stuff
where the lack of mechanical strength isn't a big deal.
Don't use it in a bending application (it's fairly flexible, and does
flow and/or take a set).
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