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Old December 11th, 2007, 00:52   #15
MadMax
Delierious Designer of Dastardly Detonations
 
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Join Date: Dec 2001
Location: in the dark recesses of some metal chip filled machine shop
SystemA does not achieve a press fit in any of those parts. The friction comes from the preload in the hopup assembly, not intentional interference between parts.

It's not very wise to manufacture with intentional interference involving cast parts that aren't finish machined especially if they're non round. Precise machined round holes are easy to manufacture for interference fits. Obround stuff that's cast is much less consistent.
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