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    80D is extremely hard for a plastic, I don't...

    80D is extremely hard for a plastic, I don't think I have ever machined any plastics that hard. Acetals and nylons are in the 65-70D range if memory serves, polyethylenes are softer. 70 to 80D is a...
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    Nevermind, I was thinking Shore A. No experience...

    Nevermind, I was thinking Shore A. No experience machining harder than 85A.
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