On 9/20/2011 11:23 PM, Carl Ijames wrote:
At work we pay about $220 for a 2' x 4' x 3/8" thick sheet of black Acetron
GP (copolymer acetal), which going by weight would imply about $440 for a 4'
x 8' x 3/16" sheet. Our favorite supplier for plastics is Sabic
Polymershapes but Total Plastics usually isn't bad either (here in Maryland,
anyway). Definitely pay them to cut any material to your final size, the
smaller pieces make shipping much cheaper and they have the right blades and
setup for good quality cuts. A typical cut spec is -0 + 0.02". I know some
materials aren't available in larger sheets above some maximum thickness, I
guess it's possible you are running into that limit. Just call a few
distributors and they will tell you.



I never could find anywhere that would sell me a 4' x 8' sheet without
having a corporate account. I wanted to form an LLC eventually but it
will cost ~$700 I don't want to spend right now. PLus I think they want
a bank account to debit, not sure if they'd accept a company credit
card. :|

Its kinda stupid though. Cope Plastics main warehouse is ~30 minutes
away. They had it, and I didn't even need it cut. I can understand that
they don't want to get nickeled-and-dimed with everybody who wants half
a square foot of this-and-that, but this would have been a $450 sale
with not much real time or effort on their part.

Using two 4-foot strips joined turns out to be a lot easier anyway.

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I see that there are various fillings you can get in acetal, but what is
"acetal copolymer"? For a .25" x 2' x 4' sheet of real-actual-Delrin I
see prices around $220, for a 2' x 4' sheet of acetal I see prices
around $120, but for acetal copolymer they want $160?

Some places sell plain acetal sheet and also sell the 'acetal copolymer'
sheet, so it's not the same thing.