Turn the problem on it’s head

27 03 2009

What if we take the bottom cylinder of the vacuum chamber and flipped it upside down and used it like a bell-jar on top of a 316L stainless steel blank?

This would take the ASA (rubber) portal count from

7 X 14″, 2 X 27″


1 X 14″, 1 X 27″

This would require a custom fabricated blank, so while were are at it let’s add a flange for our turbo-molecular pump, in it’s ideal orientation:



I’m getting quotes on the custom 27″ blank.



One response

29 03 2009

Certainly easier to pull the big vacuum, but don’t you need at least a couple of ports?

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