In article , Richard J Kinch
says...

Plain PTFE would be a poor choice for a way bearing
surface IMO.

"Turcite" (not turcite) is just a brand name. My understanding is that
Turcite B is PTFE, and Turcite A or TA and TX or X are acetal-PTFE
copolymer. If you have some other information, I'd like to hear it.

The only information I *do* know is that pure PTFE cold-flows - a
lot. It would be a poor choice for way sliders.

Jim

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